Add m-esr52 at 52.6.0

101 files changed, 10724 insertions, 0 deletions

diff --git a/dom/imptests/README b/dom/imptests/README
new file mode 100644
index 0000000000..13906cef97
--- /dev/null
+++ b/dom/imptests/README
@@ -0,0 +1,106 @@
+This directory contains tests imported from W3C test suites. In order to make it
+as easy as possible to update these tests, no changes are made to the imported
+files (names for scripted tests do get a test_ prefix to integrate with the test
+runner, however). The scripts to update tests are provided.
+
+
+=======================
+Files in this directory
+=======================
+
+Source;  Usage and purpose;  License
+
+* testharness.js / testharness.css
+  Directly imported from the W3C repository (<http://dvcs.w3.org/hg/resources>),
+  with the updateTestharness.py script.
+  Provide the test harness.
+  W3C Test Suite License / W3C 3-clause BSD License
+
+* idlharness.js
+  Directly imported from the W3C repository (<http://dvcs.w3.org/hg/resources>),
+  with the updateTestharness.py script.
+  Used to test WebIDL.
+  W3C Test Suite License / W3C 3-clause BSD License
+
+* WebIDLParser.js
+  Directly imported from the W3C repository (<http://dvcs.w3.org/hg/resources>),
+  with the updateTestharness.py script.
+  Used by idlharness.js to parse IDL blocks.
+  MIT License
+
+* updateTestharness.py
+  Used to update the above files.
+  MPL
+
+* parseManifest.py
+  Imported from <https://bitbucket.org/ms2ger/test-runner>. Parses MANIFEST
+  files (provided in the W3C repository) as documented at
+  <https://bitbucket.org/ms2ger/test-runner/raw/tip/manifests.txt>.
+  MIT License
+
+* testharnessreport.js
+  Glue between testharness.js and our Mochitest runner.
+  MPL
+
+* importTestsuite.py
+  Imports a test suite from a remote repository. Takes one argument, a file in
+  the format described under webapps.txt.
+  Note: removes both source and destination directory before starting. Do not
+        use with outstanding changes in either directory.
+  MPL
+
+* parseFailures.py
+  Parses failures out of a mochitest log and writes out JSON files and Makefiles
+  into the correct failures/ folder.
+  The mochitest log should be produced by setting the 'dumpFailures' flag in
+  testharnessreport.js; this will print out the encountered failures, marked
+  by @ signs.
+  MPL
+
+* writeBuildFiles.py
+  Helper functions to write out automatically generated build files.
+  MPL
+
+* Makefile.in
+  Integration with our build system. Installs support files into /resources and
+  includes a .mk file for each repository.
+  MPL
+
+* failures/
+  Expected failures for tests in each repository.  Each test's failures, if
+  any, are in a file with the same path and name with .json appended.  New
+  expected fail files currently needed to be added manually to makefiles.
+
+* html.mk / webapps.mk / ...
+  Generated by importTestsuite.py from webapps.txt.
+  Contains a list of the directories with tests. To be included in Makefile.in.
+
+* html.txt / webapps.txt / ...
+  Input to importTestsuite.py.
+  Lists the URL of the repository and the destination directory (separated by a
+  vertical bar), followed by a list of directories within the repository
+  (separated by line feeds).
+
+* html / webapps / ...
+  Actual tests.
+  W3C Test Suite License / W3C 3-clause BSD License
+
+
+=====================================================================
+Importing an additional directory from an already-imported repository
+=====================================================================
+
+Add a line to the relevant data file (e.g. webapps.txt), with the path to the
+additional directory relative to the root of the remote repository, and then run
+the importTestsuite.py script, passing the data file as its argument.
+
+
+==========================
+Importing a new test suite
+==========================
+
+Create a data file in the format documented above, and run the
+importTestsuite.py script, passing the data file as its argument.
+This will create a foo.mk file; include this file in dom/imptests/Makefile.in.
+
+Add any necessary files in failures/.
diff --git a/dom/imptests/WebIDLParser.js b/dom/imptests/WebIDLParser.js
new file mode 100644
index 0000000000..103a7f48bd
--- /dev/null
+++ b/dom/imptests/WebIDLParser.js
@@ -0,0 +1,924 @@
+
+
+(function () {
+    var tokenise = function (str) {
+        var tokens = []
+        ,   re = {
+                "float":        /^-?(([0-9]+\.[0-9]*|[0-9]*\.[0-9]+)([Ee][-+]?[0-9]+)?|[0-9]+[Ee][-+]?[0-9]+)/
+            ,   "integer":      /^-?(0([Xx][0-9A-Fa-f]+|[0-7]*)|[1-9][0-9]*)/
+            ,   "identifier":   /^[A-Z_a-z][0-9A-Z_a-z]*/
+            ,   "string":       /^"[^"]*"/
+            ,   "whitespace":   /^(?:[\t\n\r ]+|[\t\n\r ]*((\/\/.*|\/\*(.|\n|\r)*?\*\/)[\t\n\r ]*))+/
+            ,   "other":        /^[^\t\n\r 0-9A-Z_a-z]/
+            }
+        ,   types = []
+        ;
+        for (var k in re) types.push(k);
+        while (str.length > 0) {
+            var matched = false;
+            for (var i = 0, n = types.length; i < n; i++) {
+                var type = types[i];
+                str = str.replace(re[type], function (tok) {
+                    tokens.push({ type: type, value: tok });
+                    matched = true;
+                    return "";
+                });
+                if (matched) break;
+            }
+            if (matched) continue;
+            throw new Error("Token stream not progressing");
+        }
+        return tokens;
+    };
+    
+    var parse = function (tokens, opt) {
+        var line = 1;
+        tokens = tokens.slice();
+        
+        var FLOAT = "float"
+        ,   INT = "integer"
+        ,   ID = "identifier"
+        ,   STR = "string"
+        ,   OTHER = "other"
+        ;
+        
+        var WebIDLParseError = function (str, line, input, tokens) {
+            this.message = str;
+            this.line = line;
+            this.input = input;
+            this.tokens = tokens;
+        };
+        WebIDLParseError.prototype.toString = function () {
+            return this.message + ", line " + this.line + " (tokens: '" + this.input + "')\n" +
+                   JSON.stringify(this.tokens, null, 4);
+        };
+        
+        var error = function (str) {
+            var tok = "", numTokens = 0, maxTokens = 5;
+            while (numTokens < maxTokens && tokens.length > numTokens) {
+                tok += tokens[numTokens].value;
+                numTokens++;
+            }
+            throw new WebIDLParseError(str, line, tok, tokens.slice(0, 5));
+        };
+        
+        var last_token = null;
+        
+        var consume = function (type, value) {
+            if (!tokens.length || tokens[0].type !== type) return;
+            if (typeof value === "undefined" || tokens[0].value === value) {
+                 last_token = tokens.shift();
+                 if (type === ID) last_token.value = last_token.value.replace(/^_/, "");
+                 return last_token;
+             }
+        };
+        
+        var ws = function () {
+            if (!tokens.length) return;
+            if (tokens[0].type === "whitespace") {
+                var t = tokens.shift();
+                t.value.replace(/\n/g, function (m) { line++; return m; });
+                return t;
+            }
+        };
+        
+        var all_ws = function (store, pea) { // pea == post extended attribute, tpea = same for types
+            var t = { type: "whitespace", value: "" };
+            while (true) {
+                var w = ws();
+                if (!w) break;
+                t.value += w.value;
+            }
+            if (t.value.length > 0) {
+                if (store) {
+                    var w = t.value
+                    ,   re = {
+                            "ws":                   /^([\t\n\r ]+)/
+                        ,   "line-comment":         /^\/\/(.*)\n?/m
+                        ,   "multiline-comment":    /^\/\*((?:.|\n|\r)*?)\*\//
+                        }
+                    ,   wsTypes = []
+                    ;
+                    for (var k in re) wsTypes.push(k);
+                    while (w.length) {
+                        var matched = false;
+                        for (var i = 0, n = wsTypes.length; i < n; i++) {
+                            var type = wsTypes[i];
+                            w = w.replace(re[type], function (tok, m1) {
+                                store.push({ type: type + (pea ? ("-" + pea) : ""), value: m1 });
+                                matched = true;
+                                return "";
+                            });
+                            if (matched) break;
+                        }
+                        if (matched) continue;
+                        throw new Error("Surprising white space construct."); // this shouldn't happen
+                    }
+                }
+                return t;
+            }
+        };
+        
+        var integer_type = function () {
+            var ret = "";
+            all_ws();
+            if (consume(ID, "unsigned")) ret = "unsigned ";
+            all_ws();
+            if (consume(ID, "short")) return ret + "short";
+            if (consume(ID, "long")) {
+                ret += "long";
+                all_ws();
+                if (consume(ID, "long")) return ret + " long";
+                return ret;
+            }
+            if (ret) error("Failed to parse integer type");
+        };
+        
+        var float_type = function () {
+            var ret = "";
+            all_ws();
+            if (consume(ID, "unrestricted")) ret = "unrestricted ";
+            all_ws();
+            if (consume(ID, "float")) return ret + "float";
+            if (consume(ID, "double")) return ret + "double";
+            if (ret) error("Failed to parse float type");
+        };
+        
+        var primitive_type = function () {
+            var num_type = integer_type() || float_type();
+            if (num_type) return num_type;
+            all_ws();
+            if (consume(ID, "boolean")) return "boolean";
+            if (consume(ID, "byte")) return "byte";
+            if (consume(ID, "octet")) return "octet";
+        };
+        
+        var const_value = function () {
+            if (consume(ID, "true")) return { type: "boolean", value: true };
+            if (consume(ID, "false")) return { type: "boolean", value: false };
+            if (consume(ID, "null")) return { type: "null" };
+            if (consume(ID, "Infinity")) return { type: "Infinity", negative: false };
+            if (consume(ID, "NaN")) return { type: "NaN" };
+            var ret = consume(FLOAT) || consume(INT);
+            if (ret) return { type: "number", value: 1 * ret.value };
+            var tok = consume(OTHER, "-");
+            if (tok) {
+                if (consume(ID, "Infinity")) return { type: "Infinity", negative: true };
+                else tokens.unshift(tok);
+            }
+        };
+        
+        var type_suffix = function (obj) {
+            while (true) {
+                all_ws();
+                if (consume(OTHER, "?")) {
+                    if (obj.nullable) error("Can't nullable more than once");
+                    obj.nullable = true;
+                }
+                else if (consume(OTHER, "[")) {
+                    all_ws();
+                    consume(OTHER, "]") || error("Unterminated array type");
+                    if (!obj.array) {
+                        obj.array = 1;
+                        obj.nullableArray = [obj.nullable];
+                    }
+                    else {
+                        obj.array++;
+                        obj.nullableArray.push(obj.nullable);
+                    }
+                    obj.nullable = false;
+                }
+                else return;
+            }
+        };
+        
+        var single_type = function () {
+            var prim = primitive_type()
+            ,   ret = { sequence: false, generic: null, nullable: false, array: false, union: false }
+            ,   name
+            ,   value
+            ;
+            if (prim) {
+                ret.idlType = prim;
+            }
+            else if (name = consume(ID)) {
+                value = name.value;
+                all_ws();
+                // Generic types
+                if (consume(OTHER, "<")) {
+                    // backwards compat
+                    if (value === "sequence") {
+                        ret.sequence = true;
+                    }
+                    ret.generic = value;
+                    ret.idlType = type() || error("Error parsing generic type " + value);
+                    all_ws();
+                    if (!consume(OTHER, ">")) error("Unterminated generic type " + value);
+                    all_ws();
+                    if (consume(OTHER, "?")) ret.nullable = true;
+                    return ret;
+                }
+                else {
+                    ret.idlType = value;
+                }
+            }
+            else {
+                return;
+            }
+            type_suffix(ret);
+            if (ret.nullable && !ret.array && ret.idlType === "any") error("Type any cannot be made nullable");
+            return ret;
+        };
+        
+        var union_type = function () {
+            all_ws();
+            if (!consume(OTHER, "(")) return;
+            var ret = { sequence: false, generic: null, nullable: false, array: false, union: true, idlType: [] };
+            var fst = type() || error("Union type with no content");
+            ret.idlType.push(fst);
+            while (true) {
+                all_ws();
+                if (!consume(ID, "or")) break;
+                var typ = type() || error("No type after 'or' in union type");
+                ret.idlType.push(typ);
+            }
+            if (!consume(OTHER, ")")) error("Unterminated union type");
+            type_suffix(ret);
+            return ret;
+        };
+        
+        var type = function () {
+            return single_type() || union_type();
+        };
+        
+        var argument = function (store) {
+            var ret = { optional: false, variadic: false };
+            ret.extAttrs = extended_attrs(store);
+            all_ws(store, "pea");
+            var opt_token = consume(ID, "optional");
+            if (opt_token) {
+                ret.optional = true;
+                all_ws();
+            }
+            ret.idlType = type();
+            if (!ret.idlType) {
+                if (opt_token) tokens.unshift(opt_token);
+                return;
+            }
+            var type_token = last_token;
+            if (!ret.optional) {
+                all_ws();
+                if (tokens.length >= 3 &&
+                    tokens[0].type === "other" && tokens[0].value === "." &&
+                    tokens[1].type === "other" && tokens[1].value === "." &&
+                    tokens[2].type === "other" && tokens[2].value === "."
+                    ) {
+                    tokens.shift();
+                    tokens.shift();
+                    tokens.shift();
+                    ret.variadic = true;
+                }
+            }
+            all_ws();
+            var name = consume(ID);
+            if (!name) {
+                if (opt_token) tokens.unshift(opt_token);
+                tokens.unshift(type_token);
+                return;
+            }
+            ret.name = name.value;
+            if (ret.optional) {
+                all_ws();
+                ret["default"] = default_();
+            }
+            return ret;
+        };
+        
+        var argument_list = function (store) {
+            var ret = []
+            ,   arg = argument(store ? ret : null)
+            ;
+            if (!arg) return;
+            ret.push(arg);
+            while (true) {
+                all_ws(store ? ret : null);
+                if (!consume(OTHER, ",")) return ret;
+                var nxt = argument(store ? ret : null) || error("Trailing comma in arguments list");
+                ret.push(nxt);
+            }
+        };
+        
+        var type_pair = function () {
+            all_ws();
+            var k = type();
+            if (!k) return;
+            all_ws()
+            if (!consume(OTHER, ",")) return;
+            all_ws();
+            var v = type();
+            if (!v) return;
+            return [k, v];
+        };
+        
+        var simple_extended_attr = function (store) {
+            all_ws();
+            var name = consume(ID);
+            if (!name) return;
+            var ret = {
+                name: name.value
+            ,   "arguments": null
+            };
+            all_ws();
+            var eq = consume(OTHER, "=");
+            if (eq) {
+                all_ws();
+                ret.rhs = consume(ID);
+                if (!ret.rhs) return error("No right hand side to extended attribute assignment");
+            }
+            all_ws();
+            if (consume(OTHER, "(")) {
+                var args, pair;
+                // [Constructor(DOMString str)]
+                if (args = argument_list(store)) {
+                    ret["arguments"] = args;
+                }
+                // [MapClass(DOMString, DOMString)]
+                else if (pair = type_pair()) {
+                    ret.typePair = pair;
+                }
+                // [Constructor()]
+                else {
+                    ret["arguments"] = [];
+                }
+                all_ws();
+                consume(OTHER, ")") || error("Unexpected token in extended attribute argument list or type pair");
+            }
+            return ret;
+        };
+        
+        // Note: we parse something simpler than the official syntax. It's all that ever
+        // seems to be used
+        var extended_attrs = function (store) {
+            var eas = [];
+            all_ws(store);
+            if (!consume(OTHER, "[")) return eas;
+            eas[0] = simple_extended_attr(store) || error("Extended attribute with not content");
+            all_ws();
+            while (consume(OTHER, ",")) {
+                eas.push(simple_extended_attr(store) || error("Trailing comma in extended attribute"));
+                all_ws();
+            }
+            consume(OTHER, "]") || error("No end of extended attribute");
+            return eas;
+        };
+        
+        var default_ = function () {
+            all_ws();
+            if (consume(OTHER, "=")) {
+                all_ws();
+                var def = const_value();
+                if (def) {
+                    return def;
+                }
+                else {
+                    var str = consume(STR) || error("No value for default");
+                    str.value = str.value.replace(/^"/, "").replace(/"$/, "");
+                    return str;
+                }
+            }
+        };
+        
+        var const_ = function (store) {
+            all_ws(store, "pea");
+            if (!consume(ID, "const")) return;
+            var ret = { type: "const", nullable: false };
+            all_ws();
+            var typ = primitive_type();
+            if (!typ) {
+                typ = consume(ID) || error("No type for const");
+                typ = typ.value;
+            }
+            ret.idlType = typ;
+            all_ws();
+            if (consume(OTHER, "?")) {
+                ret.nullable = true;
+                all_ws();
+            }
+            var name = consume(ID) || error("No name for const");
+            ret.name = name.value;
+            all_ws();
+            consume(OTHER, "=") || error("No value assignment for const");
+            all_ws();
+            var cnt = const_value();
+            if (cnt) ret.value = cnt;
+            else error("No value for const");
+            all_ws();
+            consume(OTHER, ";") || error("Unterminated const");
+            return ret;
+        };
+        
+        var inheritance = function () {
+            all_ws();
+            if (consume(OTHER, ":")) {
+                all_ws();
+                var inh = consume(ID) || error ("No type in inheritance");
+                return inh.value;
+            }
+        };
+        
+        var operation_rest = function (ret, store) {
+            all_ws();
+            if (!ret) ret = {};
+            var name = consume(ID);
+            ret.name = name ? name.value : null;
+            all_ws();
+            consume(OTHER, "(") || error("Invalid operation");
+            ret["arguments"] = argument_list(store) || [];
+            all_ws();
+            consume(OTHER, ")") || error("Unterminated operation");
+            all_ws();
+            consume(OTHER, ";") || error("Unterminated operation");
+            return ret;
+        };
+        
+        var callback = function (store) {
+            all_ws(store, "pea");
+            var ret;
+            if (!consume(ID, "callback")) return;
+            all_ws();
+            var tok = consume(ID, "interface");
+            if (tok) {
+                tokens.unshift(tok);
+                ret = interface_();
+                ret.type = "callback interface";
+                return ret;
+            }
+            var name = consume(ID) || error("No name for callback");
+            ret = { type: "callback", name: name.value };
+            all_ws();
+            consume(OTHER, "=") || error("No assignment in callback");
+            all_ws();
+            ret.idlType = return_type();
+            all_ws();
+            consume(OTHER, "(") || error("No arguments in callback");
+            ret["arguments"] = argument_list(store) || [];
+            all_ws();
+            consume(OTHER, ")") || error("Unterminated callback");
+            all_ws();
+            consume(OTHER, ";") || error("Unterminated callback");
+            return ret;
+        };
+
+        var attribute = function (store) {
+            all_ws(store, "pea");
+            var grabbed = []
+            ,   ret = {
+                type:           "attribute"
+            ,   "static":       false
+            ,   stringifier:    false
+            ,   inherit:        false
+            ,   readonly:       false
+            };
+            if (consume(ID, "static")) {
+                ret["static"] = true;
+                grabbed.push(last_token);
+            }
+            else if (consume(ID, "stringifier")) {
+                ret.stringifier = true;
+                grabbed.push(last_token);
+            }
+            var w = all_ws();
+            if (w) grabbed.push(w);
+            if (consume(ID, "inherit")) {
+                if (ret["static"] || ret.stringifier) error("Cannot have a static or stringifier inherit");
+                ret.inherit = true;
+                grabbed.push(last_token);
+                var w = all_ws();
+                if (w) grabbed.push(w);
+            }
+            if (consume(ID, "readonly")) {
+                ret.readonly = true;
+                grabbed.push(last_token);
+                var w = all_ws();
+                if (w) grabbed.push(w);
+            }
+            if (!consume(ID, "attribute")) {
+                tokens = grabbed.concat(tokens);
+                return;
+            }
+            all_ws();
+            ret.idlType = type() || error("No type in attribute");
+            if (ret.idlType.sequence) error("Attributes cannot accept sequence types");
+            all_ws();
+            var name = consume(ID) || error("No name in attribute");
+            ret.name = name.value;
+            all_ws();
+            consume(OTHER, ";") || error("Unterminated attribute");
+            return ret;
+        };
+        
+        var return_type = function () {
+            var typ = type();
+            if (!typ) {
+                if (consume(ID, "void")) {
+                    return "void";
+                }
+                else error("No return type");
+            }
+            return typ;
+        };
+        
+        var operation = function (store) {
+            all_ws(store, "pea");
+            var ret = {
+                type:           "operation"
+            ,   getter:         false
+            ,   setter:         false
+            ,   creator:        false
+            ,   deleter:        false
+            ,   legacycaller:   false
+            ,   "static":       false
+            ,   stringifier:    false
+            };
+            while (true) {
+                all_ws();
+                if (consume(ID, "getter")) ret.getter = true;
+                else if (consume(ID, "setter")) ret.setter = true;
+                else if (consume(ID, "creator")) ret.creator = true;
+                else if (consume(ID, "deleter")) ret.deleter = true;
+                else if (consume(ID, "legacycaller")) ret.legacycaller = true;
+                else break;
+            }
+            if (ret.getter || ret.setter || ret.creator || ret.deleter || ret.legacycaller) {
+                all_ws();
+                ret.idlType = return_type();
+                operation_rest(ret, store);
+                return ret;
+            }
+            if (consume(ID, "static")) {
+                ret["static"] = true;
+                ret.idlType = return_type();
+                operation_rest(ret, store);
+                return ret;
+            }
+            else if (consume(ID, "stringifier")) {
+                ret.stringifier = true;
+                all_ws();
+                if (consume(OTHER, ";")) return ret;
+                ret.idlType = return_type();
+                operation_rest(ret, store);
+                return ret;
+            }
+            ret.idlType = return_type();
+            all_ws();
+            if (consume(ID, "iterator")) {
+                all_ws();
+                ret.type = "iterator";
+                if (consume(ID, "object")) {
+                    ret.iteratorObject = "object";
+                }
+                else if (consume(OTHER, "=")) {
+                    all_ws();
+                    var name = consume(ID) || error("No right hand side in iterator");
+                    ret.iteratorObject = name.value;
+                }
+                all_ws();
+                consume(OTHER, ";") || error("Unterminated iterator");
+                return ret;
+            }
+            else {
+                operation_rest(ret, store);
+                return ret;
+            }
+        };
+        
+        var identifiers = function (arr) {
+            while (true) {
+                all_ws();
+                if (consume(OTHER, ",")) {
+                    all_ws();
+                    var name = consume(ID) || error("Trailing comma in identifiers list");
+                    arr.push(name.value);
+                }
+                else break;
+            }
+        };
+        
+        var serialiser = function (store) {
+            all_ws(store, "pea");
+            if (!consume(ID, "serializer")) return;
+            var ret = { type: "serializer" };
+            all_ws();
+            if (consume(OTHER, "=")) {
+                all_ws();
+                if (consume(OTHER, "{")) {
+                    ret.patternMap = true;
+                    all_ws();
+                    var id = consume(ID);
+                    if (id && id.value === "getter") {
+                        ret.names = ["getter"];
+                    }
+                    else if (id && id.value === "inherit") {
+                        ret.names = ["inherit"];
+                        identifiers(ret.names);
+                    }
+                    else if (id) {
+                        ret.names = [id.value];
+                        identifiers(ret.names);
+                    }
+                    else {
+                        ret.names = [];
+                    }
+                    all_ws();
+                    consume(OTHER, "}") || error("Unterminated serializer pattern map");
+                }
+                else if (consume(OTHER, "[")) {
+                    ret.patternList = true;
+                    all_ws();
+                    var id = consume(ID);
+                    if (id && id.value === "getter") {
+                        ret.names = ["getter"];
+                    }
+                    else if (id) {
+                        ret.names = [id.value];
+                        identifiers(ret.names);
+                    }
+                    else {
+                        ret.names = [];
+                    }
+                    all_ws();
+                    consume(OTHER, "]") || error("Unterminated serializer pattern list");
+                }
+                else {
+                    var name = consume(ID) || error("Invalid serializer");
+                    ret.name = name.value;
+                }
+                all_ws();
+                consume(OTHER, ";") || error("Unterminated serializer");
+                return ret;
+            }
+            else if (consume(OTHER, ";")) {
+                // noop, just parsing
+            }
+            else {
+                ret.idlType = return_type();
+                all_ws();
+                ret.operation = operation_rest(null, store);
+            }
+            return ret;
+        };
+        
+        var interface_ = function (isPartial, store) {
+            all_ws(isPartial ? null : store, "pea");
+            if (!consume(ID, "interface")) return;
+            all_ws();
+            var name = consume(ID) || error("No name for interface");
+            var mems = []
+            ,   ret = {
+                type:   "interface"
+            ,   name:   name.value
+            ,   partial:    false
+            ,   members:    mems
+            };
+            if (!isPartial) ret.inheritance = inheritance() || null;
+            all_ws();
+            consume(OTHER, "{") || error("Bodyless interface");
+            while (true) {
+                all_ws(store ? mems : null);
+                if (consume(OTHER, "}")) {
+                    all_ws();
+                    consume(OTHER, ";") || error("Missing semicolon after interface");
+                    return ret;
+                }
+                var ea = extended_attrs(store ? mems : null);
+                all_ws();
+                var cnt = const_(store ? mems : null);
+                if (cnt) {
+                    cnt.extAttrs = ea;
+                    ret.members.push(cnt);
+                    continue;
+                }
+                var mem = serialiser(store ? mems : null) ||
+                          attribute(store ? mems : null) ||
+                          operation(store ? mems : null) ||
+                          error("Unknown member");
+                mem.extAttrs = ea;
+                ret.members.push(mem);
+            }
+        };
+        
+        var partial = function (store) {
+            all_ws(store, "pea");
+            if (!consume(ID, "partial")) return;
+            var thing = dictionary(true, store) ||
+                        interface_(true, store) ||
+                        error("Partial doesn't apply to anything");
+            thing.partial = true;
+            return thing;
+        };
+        
+        var dictionary = function (isPartial, store) {
+            all_ws(isPartial ? null : store, "pea");
+            if (!consume(ID, "dictionary")) return;
+            all_ws();
+            var name = consume(ID) || error("No name for dictionary");
+            var mems = []
+            ,   ret = {
+                type:   "dictionary"
+            ,   name:   name.value
+            ,   partial:    false
+            ,   members:    mems
+            };
+            if (!isPartial) ret.inheritance = inheritance() || null;
+            all_ws();
+            consume(OTHER, "{") || error("Bodyless dictionary");
+            while (true) {
+                all_ws(store ? mems : null);
+                if (consume(OTHER, "}")) {
+                    all_ws();
+                    consume(OTHER, ";") || error("Missing semicolon after dictionary");
+                    return ret;
+                }
+                var ea = extended_attrs(store ? mems : null);
+                all_ws(store ? mems : null, "pea");
+                var typ = type() || error("No type for dictionary member");
+                all_ws();
+                var name = consume(ID) || error("No name for dictionary member");
+                ret.members.push({
+                    type:       "field"
+                ,   name:       name.value
+                ,   idlType:    typ
+                ,   extAttrs:   ea
+                ,   "default":  default_()
+                });
+                all_ws();
+                consume(OTHER, ";") || error("Unterminated dictionary member");
+            }
+        };
+        
+        var exception = function (store) {
+            all_ws(store, "pea");
+            if (!consume(ID, "exception")) return;
+            all_ws();
+            var name = consume(ID) || error("No name for exception");
+            var mems = []
+            ,   ret = {
+                type:   "exception"
+            ,   name:   name.value
+            ,   members:    mems
+            };
+            ret.inheritance = inheritance() || null;
+            all_ws();
+            consume(OTHER, "{") || error("Bodyless exception");
+            while (true) {
+                all_ws(store ? mems : null);
+                if (consume(OTHER, "}")) {
+                    all_ws();
+                    consume(OTHER, ";") || error("Missing semicolon after exception");
+                    return ret;
+                }
+                var ea = extended_attrs(store ? mems : null);
+                all_ws(store ? mems : null, "pea");
+                var cnt = const_();
+                if (cnt) {
+                    cnt.extAttrs = ea;
+                    ret.members.push(cnt);
+                }
+                else {
+                    var typ = type();
+                    all_ws();
+                    var name = consume(ID);
+                    all_ws();
+                    if (!typ || !name || !consume(OTHER, ";")) error("Unknown member in exception body");
+                    ret.members.push({
+                        type:       "field"
+                    ,   name:       name.value
+                    ,   idlType:    typ
+                    ,   extAttrs:   ea
+                    });
+                }
+            }
+        };
+        
+        var enum_ = function (store) {
+            all_ws(store, "pea");
+            if (!consume(ID, "enum")) return;
+            all_ws();
+            var name = consume(ID) || error("No name for enum");
+            var vals = []
+            ,   ret = {
+                type:   "enum"
+            ,   name:   name.value
+            ,   values: vals
+            };
+            all_ws();
+            consume(OTHER, "{") || error("No curly for enum");
+            var saw_comma = false;
+            while (true) {
+                all_ws(store ? vals : null);
+                if (consume(OTHER, "}")) {
+                    all_ws();
+                    if (saw_comma) error("Trailing comma in enum");
+                    consume(OTHER, ";") || error("No semicolon after enum");
+                    return ret;
+                }
+                var val = consume(STR) || error("Unexpected value in enum");
+                ret.values.push(val.value.replace(/"/g, ""));
+                all_ws(store ? vals : null);
+                if (consume(OTHER, ",")) {
+                    if (store) vals.push({ type: "," });
+                    all_ws(store ? vals : null);
+                    saw_comma = true;
+                }
+                else {
+                    saw_comma = false;
+                }
+            }
+        };
+        
+        var typedef = function (store) {
+            all_ws(store, "pea");
+            if (!consume(ID, "typedef")) return;
+            var ret = {
+                type:   "typedef"
+            };
+            all_ws();
+            ret.typeExtAttrs = extended_attrs();
+            all_ws(store, "tpea");
+            ret.idlType = type() || error("No type in typedef");
+            all_ws();
+            var name = consume(ID) || error("No name in typedef");
+            ret.name = name.value;
+            all_ws();
+            consume(OTHER, ";") || error("Unterminated typedef");
+            return ret;
+        };
+        
+        var implements_ = function (store) {
+            all_ws(store, "pea");
+            var target = consume(ID);
+            if (!target) return;
+            var w = all_ws();
+            if (consume(ID, "implements")) {
+                var ret = {
+                    type:   "implements"
+                ,   target: target.value
+                };
+                all_ws();
+                var imp = consume(ID) || error("Incomplete implements statement");
+                ret["implements"] = imp.value;
+                all_ws();
+                consume(OTHER, ";") || error("No terminating ; for implements statement");
+                return ret;
+            }
+            else {
+                // rollback
+                tokens.unshift(w);
+                tokens.unshift(target);
+            }
+        };
+        
+        var definition = function (store) {
+            return  callback(store)             ||
+                    interface_(false, store)    ||
+                    partial(store)              ||
+                    dictionary(false, store)    ||
+                    exception(store)            ||
+                    enum_(store)                ||
+                    typedef(store)              ||
+                    implements_(store)
+                    ;
+        };
+        
+        var definitions = function (store) {
+            if (!tokens.length) return [];
+            var defs = [];
+            while (true) {
+                var ea = extended_attrs(store ? defs : null)
+                ,   def = definition(store ? defs : null);
+                if (!def) {
+                    if (ea.length) error("Stray extended attributes");
+                    break;
+                }
+                def.extAttrs = ea;
+                defs.push(def);
+            }
+            return defs;
+        };
+        var res = definitions(opt.ws);
+        if (tokens.length) error("Unrecognised tokens");
+        return res;
+    };
+
+    var inNode = typeof module !== "undefined" && module.exports
+    ,   obj = {
+            parse:  function (str, opt) {
+                if (!opt) opt = {};
+                var tokens = tokenise(str);
+                return parse(tokens, opt);
+            }
+    };
+
+    if (inNode) module.exports = obj;
+    else        self.WebIDL2 = obj;
+}());
diff --git a/dom/imptests/editing/mochitest.ini b/dom/imptests/editing/mochitest.ini
new file mode 100644
index 0000000000..b5c82f5d49
--- /dev/null
+++ b/dom/imptests/editing/mochitest.ini
@@ -0,0 +1,26 @@
+# THIS FILE IS AUTOGENERATED BY importTestsuite.py - DO NOT EDIT
+[DEFAULT]
+support-files =
+  conformancetest/data.js
+  css/reset.css
+  implementation.js
+  selecttest/common.js
+  selecttest/test-iframe.html
+  tests.js
+
+[conformancetest/test_event.html]
+[conformancetest/test_runtest.html]
+skip-if = toolkit == 'android'
+[selecttest/test_Document-open.html]
+[selecttest/test_addRange.html]
+skip-if = toolkit == 'android' #android(bug 775227)
+[selecttest/test_collapse.html]
+[selecttest/test_collapseToStartEnd.html]
+[selecttest/test_deleteFromDocument.html]
+[selecttest/test_extend.html]
+[selecttest/test_getRangeAt.html]
+[selecttest/test_getSelection.html]
+[selecttest/test_interfaces.html]
+[selecttest/test_isCollapsed.html]
+[selecttest/test_removeAllRanges.html]
+[selecttest/test_selectAllChildren.html]
diff --git a/dom/imptests/failures/html/dom/nodes/mochitest.ini b/dom/imptests/failures/html/dom/nodes/mochitest.ini
new file mode 100644
index 0000000000..4fb17f193b
--- /dev/null
+++ b/dom/imptests/failures/html/dom/nodes/mochitest.ini
@@ -0,0 +1,13 @@
+# THIS FILE IS AUTOGENERATED BY parseFailures.py - DO NOT EDIT
+[DEFAULT]
+support-files =
+
+
+[test_Document-createElement-namespace.html.json]
+[test_Document-createElementNS.html.json]
+[test_Document-getElementsByTagName.html.json]
+[test_Node-properties.html.json]
+[test_attributes.html.json]
+[test_case.html.json]
+[test_getElementsByClassName-10.xml.json]
+[test_getElementsByClassName-11.xml.json]
diff --git a/dom/imptests/failures/html/dom/ranges/mochitest.ini b/dom/imptests/failures/html/dom/ranges/mochitest.ini
new file mode 100644
index 0000000000..da0d1a7711
--- /dev/null
+++ b/dom/imptests/failures/html/dom/ranges/mochitest.ini
@@ -0,0 +1,7 @@
+# THIS FILE IS AUTOGENERATED BY parseFailures.py - DO NOT EDIT
+[DEFAULT]
+support-files =
+
+
+[test_Range-insertNode.html.json]
+[test_Range-surroundContents.html.json]
diff --git a/dom/imptests/failures/html/dom/ranges/test_Range-insertNode.html.json b/dom/imptests/failures/html/dom/ranges/test_Range-insertNode.html.json
new file mode 100644
index 0000000000..a5ac1621d2
--- /dev/null
+++ b/dom/imptests/failures/html/dom/ranges/test_Range-insertNode.html.json
@@ -0,0 +1,6 @@
+{
+  "0,1: resulting range position for range [paras[0].firstChild, 0, paras[0].firstChild, 0], node paras[0].firstChild": true,
+  "4,2: resulting range position for range [paras[1].firstChild, 0, paras[1].firstChild, 0], node paras[1].firstChild": true,
+  "6,6: resulting range position for range [detachedPara1.firstChild, 0, detachedPara1.firstChild, 0], node detachedPara1.firstChild": true,
+  "8,4: resulting range position for range [foreignPara1.firstChild, 0, foreignPara1.firstChild, 0], node foreignPara1.firstChild": true
+}
diff --git a/dom/imptests/failures/html/dom/ranges/test_Range-surroundContents.html.json b/dom/imptests/failures/html/dom/ranges/test_Range-surroundContents.html.json
new file mode 100644
index 0000000000..720ee5edb6
--- /dev/null
+++ b/dom/imptests/failures/html/dom/ranges/test_Range-surroundContents.html.json
@@ -0,0 +1,44 @@
+{
+  "0,1: resulting range position for range [paras[0].firstChild, 0, paras[0].firstChild, 0], node paras[0].firstChild": true,
+  "1,1: resulting range position for range [paras[0].firstChild, 0, paras[0].firstChild, 1], node paras[0].firstChild": true,
+  "2,1: resulting range position for range [paras[0].firstChild, 2, paras[0].firstChild, 8], node paras[0].firstChild": true,
+  "3,1: resulting range position for range [paras[0].firstChild, 2, paras[0].firstChild, 9], node paras[0].firstChild": true,
+  "4,2: resulting range position for range [paras[1].firstChild, 0, paras[1].firstChild, 0], node paras[1].firstChild": true,
+  "5,2: resulting range position for range [paras[1].firstChild, 2, paras[1].firstChild, 9], node paras[1].firstChild": true,
+  "6,6: resulting range position for range [detachedPara1.firstChild, 0, detachedPara1.firstChild, 0], node detachedPara1.firstChild": true,
+  "7,6: resulting range position for range [detachedPara1.firstChild, 2, detachedPara1.firstChild, 8], node detachedPara1.firstChild": true,
+  "8,4: resulting range position for range [foreignPara1.firstChild, 0, foreignPara1.firstChild, 0], node foreignPara1.firstChild": true,
+  "9,4: resulting range position for range [foreignPara1.firstChild, 2, foreignPara1.firstChild, 8], node foreignPara1.firstChild": true,
+  "37,0: resulting DOM for range [processingInstruction, 0, processingInstruction, 4], node paras[0]": true,
+  "37,0: resulting range position for range [processingInstruction, 0, processingInstruction, 4], node paras[0]": true,
+  "37,1: resulting DOM for range [processingInstruction, 0, processingInstruction, 4], node paras[0].firstChild": true,
+  "37,1: resulting range position for range [processingInstruction, 0, processingInstruction, 4], node paras[0].firstChild": true,
+  "37,2: resulting DOM for range [processingInstruction, 0, processingInstruction, 4], node paras[1].firstChild": true,
+  "37,2: resulting range position for range [processingInstruction, 0, processingInstruction, 4], node paras[1].firstChild": true,
+  "37,3: resulting DOM for range [processingInstruction, 0, processingInstruction, 4], node foreignPara1": true,
+  "37,3: resulting range position for range [processingInstruction, 0, processingInstruction, 4], node foreignPara1": true,
+  "37,4: resulting DOM for range [processingInstruction, 0, processingInstruction, 4], node foreignPara1.firstChild": true,
+  "37,4: resulting range position for range [processingInstruction, 0, processingInstruction, 4], node foreignPara1.firstChild": true,
+  "37,5: resulting DOM for range [processingInstruction, 0, processingInstruction, 4], node detachedPara1": true,
+  "37,5: resulting range position for range [processingInstruction, 0, processingInstruction, 4], node detachedPara1": true,
+  "37,6: resulting DOM for range [processingInstruction, 0, processingInstruction, 4], node detachedPara1.firstChild": true,
+  "37,6: resulting range position for range [processingInstruction, 0, processingInstruction, 4], node detachedPara1.firstChild": true,
+  "37,8: resulting DOM for range [processingInstruction, 0, processingInstruction, 4], node detachedDiv": true,
+  "37,8: resulting range position for range [processingInstruction, 0, processingInstruction, 4], node detachedDiv": true,
+  "37,10: resulting DOM for range [processingInstruction, 0, processingInstruction, 4], node foreignPara2": true,
+  "37,10: resulting range position for range [processingInstruction, 0, processingInstruction, 4], node foreignPara2": true,
+  "37,12: resulting DOM for range [processingInstruction, 0, processingInstruction, 4], node xmlElement": true,
+  "37,12: resulting range position for range [processingInstruction, 0, processingInstruction, 4], node xmlElement": true,
+  "37,13: resulting DOM for range [processingInstruction, 0, processingInstruction, 4], node detachedTextNode": true,
+  "37,13: resulting range position for range [processingInstruction, 0, processingInstruction, 4], node detachedTextNode": true,
+  "37,14: resulting DOM for range [processingInstruction, 0, processingInstruction, 4], node foreignTextNode": true,
+  "37,14: resulting range position for range [processingInstruction, 0, processingInstruction, 4], node foreignTextNode": true,
+  "37,15: resulting DOM for range [processingInstruction, 0, processingInstruction, 4], node processingInstruction": true,
+  "37,15: resulting range position for range [processingInstruction, 0, processingInstruction, 4], node processingInstruction": true,
+  "37,16: resulting DOM for range [processingInstruction, 0, processingInstruction, 4], node detachedProcessingInstruction": true,
+  "37,16: resulting range position for range [processingInstruction, 0, processingInstruction, 4], node detachedProcessingInstruction": true,
+  "37,17: resulting DOM for range [processingInstruction, 0, processingInstruction, 4], node comment": true,
+  "37,17: resulting range position for range [processingInstruction, 0, processingInstruction, 4], node comment": true,
+  "37,18: resulting DOM for range [processingInstruction, 0, processingInstruction, 4], node detachedComment": true,
+  "37,18: resulting range position for range [processingInstruction, 0, processingInstruction, 4], node detachedComment": true
+}
diff --git a/dom/imptests/failures/html/dom/test_historical.html.json b/dom/imptests/failures/html/dom/test_historical.html.json
new file mode 100644
index 0000000000..42e78b23d5
--- /dev/null
+++ b/dom/imptests/failures/html/dom/test_historical.html.json
@@ -0,0 +1,10 @@
+{
+  "Historical DOM features must be removed: CDATASection": true,
+  "Historical DOM features must be removed: createCDATASection": true,
+  "Historical DOM features must be removed: createAttribute": true,
+  "Historical DOM features must be removed: createAttributeNS": true,
+  "Historical DOM features must be removed: getAttributeNode": true,
+  "Historical DOM features must be removed: getAttributeNodeNS": true,
+  "Historical DOM features must be removed: setAttributeNode": true,
+  "Historical DOM features must be removed: removeAttributeNode": true
+}
diff --git a/dom/imptests/failures/html/html/browsers/the-window-object/test_window-named-properties.html.json b/dom/imptests/failures/html/html/browsers/the-window-object/test_window-named-properties.html.json
new file mode 100644
index 0000000000..2c63c08510
--- /dev/null
+++ b/dom/imptests/failures/html/html/browsers/the-window-object/test_window-named-properties.html.json
@@ -0,0 +1,2 @@
+{
+}
diff --git a/dom/imptests/failures/html/html/browsers/the-window-object/test_window-properties.html.json b/dom/imptests/failures/html/html/browsers/the-window-object/test_window-properties.html.json
new file mode 100644
index 0000000000..b34f6573fa
--- /dev/null
+++ b/dom/imptests/failures/html/html/browsers/the-window-object/test_window-properties.html.json
@@ -0,0 +1,31 @@
+{
+  "EventTarget method: addEventListener": true,
+  "EventTarget method: removeEventListener": true,
+  "EventTarget method: dispatchEvent": true,
+  "Window readonly attribute: history": true,
+  "Window readonly attribute: parent": true,
+  "Window readonly attribute: frameElement": true,
+  "Window readonly attribute: navigator": true,
+  "Window readonly attribute: external": true,
+  "Window readonly attribute: applicationCache": true,
+  "Window readonly attribute: sessionStorage": true,
+  "Window readonly attribute: localStorage": true,
+  "Window readonly attribute: screen": true,
+  "Window readonly attribute: innerWidth": true,
+  "Window readonly attribute: innerHeight": true,
+  "Window readonly attribute: scrollX": true,
+  "Window readonly attribute: pageXOffset": true,
+  "Window readonly attribute: scrollY": true,
+  "Window readonly attribute: pageYOffset": true,
+  "Window readonly attribute: screenX": true,
+  "Window readonly attribute: screenY": true,
+  "Window readonly attribute: outerWidth": true,
+  "Window readonly attribute: outerHeight": true,
+  "Window attribute: oncancel": true,
+  "Window attribute: onclose": true,
+  "Window attribute: oncuechange": true,
+  "Window attribute: onmousewheel": true,
+  "Window unforgeable attribute: window": true,
+  "Window unforgeable attribute: document": true,
+  "Window unforgeable attribute: top": true
+}
diff --git a/dom/imptests/failures/html/html/dom/documents/dta/mochitest.ini b/dom/imptests/failures/html/html/dom/documents/dta/mochitest.ini
new file mode 100644
index 0000000000..6777d58162
--- /dev/null
+++ b/dom/imptests/failures/html/html/dom/documents/dta/mochitest.ini
@@ -0,0 +1,11 @@
+# THIS FILE IS AUTOGENERATED BY parseFailures.py - DO NOT EDIT
+[DEFAULT]
+support-files =
+
+
+[test_document.title-06.html.json]
+[test_nameditem-02.html.json]
+[test_nameditem-03.html.json]
+[test_nameditem-04.html.json]
+[test_nameditem-05.html.json]
+[test_nameditem-06.html.json]
diff --git a/dom/imptests/failures/html/html/dom/documents/dta/test_nameditem-06.html.json b/dom/imptests/failures/html/html/dom/documents/dta/test_nameditem-06.html.json
new file mode 100644
index 0000000000..504194194b
--- /dev/null
+++ b/dom/imptests/failures/html/html/dom/documents/dta/test_nameditem-06.html.json
@@ -0,0 +1,3 @@
+{
+  "If there are two imgs, a collection should be returned. (name)": true
+}
diff --git a/dom/imptests/failures/html/typedarrays/mochitest.ini b/dom/imptests/failures/html/typedarrays/mochitest.ini
new file mode 100644
index 0000000000..90d5fe8020
--- /dev/null
+++ b/dom/imptests/failures/html/typedarrays/mochitest.ini
@@ -0,0 +1,6 @@
+# THIS FILE IS AUTOGENERATED BY parseFailures.py - DO NOT EDIT
+[DEFAULT]
+support-files =
+
+
+[test_constructors.html.json]
diff --git a/dom/imptests/failures/html/typedarrays/test_constructors.html.json b/dom/imptests/failures/html/typedarrays/test_constructors.html.json
new file mode 100644
index 0000000000..046fde96de
--- /dev/null
+++ b/dom/imptests/failures/html/typedarrays/test_constructors.html.json
@@ -0,0 +1,147 @@
+{
+  "Constructing interface Int8Array with no arguments should throw.": true,
+  "Constructing interface Uint8Array with no arguments should throw.": true,
+  "Constructing interface Uint8ClampedArray with no arguments should throw.": true,
+  "Constructing interface Int16Array with no arguments should throw.": true,
+  "Constructing interface Uint16Array with no arguments should throw.": true,
+  "Constructing interface Int32Array with no arguments should throw.": true,
+  "Constructing interface Uint32Array with no arguments should throw.": true,
+  "Constructing interface Float32Array with no arguments should throw.": true,
+  "Constructing interface Float64Array with no arguments should throw.": true,
+  "Constructing interface ArrayBuffer with no arguments should throw.": true,
+  "The argument NaN (0) should be interpreted as 0 for interface Int8Array.": true,
+  "The argument Infinity (1) should be interpreted as 0 for interface Int8Array.": true,
+  "The argument -Infinity (2) should be interpreted as 0 for interface Int8Array.": true,
+  "The argument -0.4 (5) should be interpreted as 0 for interface Int8Array.": true,
+  "The argument -0.9 (6) should be interpreted as 0 for interface Int8Array.": true,
+  "The argument 1.1 (7) should be interpreted as 1 for interface Int8Array.": true,
+  "The argument 2.9 (8) should be interpreted as 2 for interface Int8Array.": true,
+  "The argument -4043309056 (10) should be interpreted as 251658240 for interface Int8Array.": true,
+  "The argument \"1\" (11) should be interpreted as 1 for interface Int8Array.": true,
+  "The argument \"1e2\" (12) should be interpreted as 100 for interface Int8Array.": true,
+  "The argument undefined (13) should be interpreted as 0 for interface Int8Array.": true,
+  "The argument null (14) should be interpreted as 0 for interface Int8Array.": true,
+  "The argument false (15) should be interpreted as 0 for interface Int8Array.": true,
+  "The argument true (16) should be interpreted as 1 for interface Int8Array.": true,
+  "The argument object \"[object Object]\" (18) should be interpreted as 0 for interface Int8Array.": true,
+  "The argument NaN (0) should be interpreted as 0 for interface Uint8Array.": true,
+  "The argument Infinity (1) should be interpreted as 0 for interface Uint8Array.": true,
+  "The argument -Infinity (2) should be interpreted as 0 for interface Uint8Array.": true,
+  "The argument -0.4 (5) should be interpreted as 0 for interface Uint8Array.": true,
+  "The argument -0.9 (6) should be interpreted as 0 for interface Uint8Array.": true,
+  "The argument 1.1 (7) should be interpreted as 1 for interface Uint8Array.": true,
+  "The argument 2.9 (8) should be interpreted as 2 for interface Uint8Array.": true,
+  "The argument -4043309056 (10) should be interpreted as 251658240 for interface Uint8Array.": true,
+  "The argument \"1\" (11) should be interpreted as 1 for interface Uint8Array.": true,
+  "The argument \"1e2\" (12) should be interpreted as 100 for interface Uint8Array.": true,
+  "The argument undefined (13) should be interpreted as 0 for interface Uint8Array.": true,
+  "The argument null (14) should be interpreted as 0 for interface Uint8Array.": true,
+  "The argument false (15) should be interpreted as 0 for interface Uint8Array.": true,
+  "The argument true (16) should be interpreted as 1 for interface Uint8Array.": true,
+  "The argument object \"[object Object]\" (18) should be interpreted as 0 for interface Uint8Array.": true,
+  "The argument NaN (0) should be interpreted as 0 for interface Uint8ClampedArray.": true,
+  "The argument Infinity (1) should be interpreted as 0 for interface Uint8ClampedArray.": true,
+  "The argument -Infinity (2) should be interpreted as 0 for interface Uint8ClampedArray.": true,
+  "The argument -0.4 (5) should be interpreted as 0 for interface Uint8ClampedArray.": true,
+  "The argument -0.9 (6) should be interpreted as 0 for interface Uint8ClampedArray.": true,
+  "The argument 1.1 (7) should be interpreted as 1 for interface Uint8ClampedArray.": true,
+  "The argument 2.9 (8) should be interpreted as 2 for interface Uint8ClampedArray.": true,
+  "The argument -4043309056 (10) should be interpreted as 251658240 for interface Uint8ClampedArray.": true,
+  "The argument \"1\" (11) should be interpreted as 1 for interface Uint8ClampedArray.": true,
+  "The argument \"1e2\" (12) should be interpreted as 100 for interface Uint8ClampedArray.": true,
+  "The argument undefined (13) should be interpreted as 0 for interface Uint8ClampedArray.": true,
+  "The argument null (14) should be interpreted as 0 for interface Uint8ClampedArray.": true,
+  "The argument false (15) should be interpreted as 0 for interface Uint8ClampedArray.": true,
+  "The argument true (16) should be interpreted as 1 for interface Uint8ClampedArray.": true,
+  "The argument object \"[object Object]\" (18) should be interpreted as 0 for interface Uint8ClampedArray.": true,
+  "The argument NaN (0) should be interpreted as 0 for interface Int16Array.": true,
+  "The argument Infinity (1) should be interpreted as 0 for interface Int16Array.": true,
+  "The argument -Infinity (2) should be interpreted as 0 for interface Int16Array.": true,
+  "The argument -0.4 (5) should be interpreted as 0 for interface Int16Array.": true,
+  "The argument -0.9 (6) should be interpreted as 0 for interface Int16Array.": true,
+  "The argument 1.1 (7) should be interpreted as 1 for interface Int16Array.": true,
+  "The argument 2.9 (8) should be interpreted as 2 for interface Int16Array.": true,
+  "The argument -4043309056 (10) should be interpreted as 251658240 for interface Int16Array.": true,
+  "The argument \"1\" (11) should be interpreted as 1 for interface Int16Array.": true,
+  "The argument \"1e2\" (12) should be interpreted as 100 for interface Int16Array.": true,
+  "The argument undefined (13) should be interpreted as 0 for interface Int16Array.": true,
+  "The argument null (14) should be interpreted as 0 for interface Int16Array.": true,
+  "The argument false (15) should be interpreted as 0 for interface Int16Array.": true,
+  "The argument true (16) should be interpreted as 1 for interface Int16Array.": true,
+  "The argument object \"[object Object]\" (18) should be interpreted as 0 for interface Int16Array.": true,
+  "The argument NaN (0) should be interpreted as 0 for interface Uint16Array.": true,
+  "The argument Infinity (1) should be interpreted as 0 for interface Uint16Array.": true,
+  "The argument -Infinity (2) should be interpreted as 0 for interface Uint16Array.": true,
+  "The argument -0.4 (5) should be interpreted as 0 for interface Uint16Array.": true,
+  "The argument -0.9 (6) should be interpreted as 0 for interface Uint16Array.": true,
+  "The argument 1.1 (7) should be interpreted as 1 for interface Uint16Array.": true,
+  "The argument 2.9 (8) should be interpreted as 2 for interface Uint16Array.": true,
+  "The argument -4043309056 (10) should be interpreted as 251658240 for interface Uint16Array.": true,
+  "The argument \"1\" (11) should be interpreted as 1 for interface Uint16Array.": true,
+  "The argument \"1e2\" (12) should be interpreted as 100 for interface Uint16Array.": true,
+  "The argument undefined (13) should be interpreted as 0 for interface Uint16Array.": true,
+  "The argument null (14) should be interpreted as 0 for interface Uint16Array.": true,
+  "The argument false (15) should be interpreted as 0 for interface Uint16Array.": true,
+  "The argument true (16) should be interpreted as 1 for interface Uint16Array.": true,
+  "The argument object \"[object Object]\" (18) should be interpreted as 0 for interface Uint16Array.": true,
+  "The argument NaN (0) should be interpreted as 0 for interface Int32Array.": true,
+  "The argument Infinity (1) should be interpreted as 0 for interface Int32Array.": true,
+  "The argument -Infinity (2) should be interpreted as 0 for interface Int32Array.": true,
+  "The argument -0.4 (5) should be interpreted as 0 for interface Int32Array.": true,
+  "The argument -0.9 (6) should be interpreted as 0 for interface Int32Array.": true,
+  "The argument 1.1 (7) should be interpreted as 1 for interface Int32Array.": true,
+  "The argument 2.9 (8) should be interpreted as 2 for interface Int32Array.": true,
+  "The argument -4043309056 (10) should be interpreted as 251658240 for interface Int32Array.": true,
+  "The argument \"1\" (11) should be interpreted as 1 for interface Int32Array.": true,
+  "The argument \"1e2\" (12) should be interpreted as 100 for interface Int32Array.": true,
+  "The argument undefined (13) should be interpreted as 0 for interface Int32Array.": true,
+  "The argument null (14) should be interpreted as 0 for interface Int32Array.": true,
+  "The argument false (15) should be interpreted as 0 for interface Int32Array.": true,
+  "The argument true (16) should be interpreted as 1 for interface Int32Array.": true,
+  "The argument object \"[object Object]\" (18) should be interpreted as 0 for interface Int32Array.": true,
+  "The argument NaN (0) should be interpreted as 0 for interface Uint32Array.": true,
+  "The argument Infinity (1) should be interpreted as 0 for interface Uint32Array.": true,
+  "The argument -Infinity (2) should be interpreted as 0 for interface Uint32Array.": true,
+  "The argument -0.4 (5) should be interpreted as 0 for interface Uint32Array.": true,
+  "The argument -0.9 (6) should be interpreted as 0 for interface Uint32Array.": true,
+  "The argument 1.1 (7) should be interpreted as 1 for interface Uint32Array.": true,
+  "The argument 2.9 (8) should be interpreted as 2 for interface Uint32Array.": true,
+  "The argument -4043309056 (10) should be interpreted as 251658240 for interface Uint32Array.": true,
+  "The argument \"1\" (11) should be interpreted as 1 for interface Uint32Array.": true,
+  "The argument \"1e2\" (12) should be interpreted as 100 for interface Uint32Array.": true,
+  "The argument undefined (13) should be interpreted as 0 for interface Uint32Array.": true,
+  "The argument null (14) should be interpreted as 0 for interface Uint32Array.": true,
+  "The argument false (15) should be interpreted as 0 for interface Uint32Array.": true,
+  "The argument true (16) should be interpreted as 1 for interface Uint32Array.": true,
+  "The argument object \"[object Object]\" (18) should be interpreted as 0 for interface Uint32Array.": true,
+  "The argument NaN (0) should be interpreted as 0 for interface Float32Array.": true,
+  "The argument Infinity (1) should be interpreted as 0 for interface Float32Array.": true,
+  "The argument -Infinity (2) should be interpreted as 0 for interface Float32Array.": true,
+  "The argument -0.4 (5) should be interpreted as 0 for interface Float32Array.": true,
+  "The argument -0.9 (6) should be interpreted as 0 for interface Float32Array.": true,
+  "The argument 1.1 (7) should be interpreted as 1 for interface Float32Array.": true,
+  "The argument 2.9 (8) should be interpreted as 2 for interface Float32Array.": true,
+  "The argument -4043309056 (10) should be interpreted as 251658240 for interface Float32Array.": true,
+  "The argument \"1\" (11) should be interpreted as 1 for interface Float32Array.": true,
+  "The argument \"1e2\" (12) should be interpreted as 100 for interface Float32Array.": true,
+  "The argument undefined (13) should be interpreted as 0 for interface Float32Array.": true,
+  "The argument null (14) should be interpreted as 0 for interface Float32Array.": true,
+  "The argument false (15) should be interpreted as 0 for interface Float32Array.": true,
+  "The argument true (16) should be interpreted as 1 for interface Float32Array.": true,
+  "The argument object \"[object Object]\" (18) should be interpreted as 0 for interface Float32Array.": true,
+  "The argument NaN (0) should be interpreted as 0 for interface Float64Array.": true,
+  "The argument Infinity (1) should be interpreted as 0 for interface Float64Array.": true,
+  "The argument -Infinity (2) should be interpreted as 0 for interface Float64Array.": true,
+  "The argument -0.4 (5) should be interpreted as 0 for interface Float64Array.": true,
+  "The argument -0.9 (6) should be interpreted as 0 for interface Float64Array.": true,
+  "The argument 1.1 (7) should be interpreted as 1 for interface Float64Array.": true,
+  "The argument 2.9 (8) should be interpreted as 2 for interface Float64Array.": true,
+  "The argument -4043309056 (10) should be interpreted as 251658240 for interface Float64Array.": true,
+  "The argument \"1\" (11) should be interpreted as 1 for interface Float64Array.": true,
+  "The argument \"1e2\" (12) should be interpreted as 100 for interface Float64Array.": true,
+  "The argument undefined (13) should be interpreted as 0 for interface Float64Array.": true,
+  "The argument null (14) should be interpreted as 0 for interface Float64Array.": true,
+  "The argument false (15) should be interpreted as 0 for interface Float64Array.": true,
+  "The argument true (16) should be interpreted as 1 for interface Float64Array.": true,
+  "The argument object \"[object Object]\" (18) should be interpreted as 0 for interface Float64Array.": true
+}
diff --git a/dom/imptests/failures/webapps/WebStorage/tests/submissions/Infraware/mochitest.ini b/dom/imptests/failures/webapps/WebStorage/tests/submissions/Infraware/mochitest.ini
new file mode 100644
index 0000000000..f17aa2160f
--- /dev/null
+++ b/dom/imptests/failures/webapps/WebStorage/tests/submissions/Infraware/mochitest.ini
@@ -0,0 +1,6 @@
+# THIS FILE IS AUTOGENERATED BY parseFailures.py - DO NOT EDIT
+[DEFAULT]
+support-files =
+
+
+[test_storage_local_security.html.json]
diff --git a/dom/imptests/failures/webapps/WebStorage/tests/submissions/Infraware/test_storage_local_security.html.json b/dom/imptests/failures/webapps/WebStorage/tests/submissions/Infraware/test_storage_local_security.html.json
new file mode 100644
index 0000000000..ea1a73ebfc
--- /dev/null
+++ b/dom/imptests/failures/webapps/WebStorage/tests/submissions/Infraware/test_storage_local_security.html.json
@@ -0,0 +1,3 @@
+{
+  "storage local security test": true
+}
diff --git a/dom/imptests/html.txt b/dom/imptests/html.txt
new file mode 100644
index 0000000000..2d06371d86
--- /dev/null
+++ b/dom/imptests/html.txt
@@ -0,0 +1,3 @@
+git|git://github.com/w3c/web-platform-tests.git|html
+typedarrays
+webgl
diff --git a/dom/imptests/html/dom/common.js b/dom/imptests/html/dom/common.js
new file mode 100644
index 0000000000..dc7528a9a9
--- /dev/null
+++ b/dom/imptests/html/dom/common.js
@@ -0,0 +1,1087 @@
+"use strict";
+// Written by Aryeh Gregor <ayg@aryeh.name>
+
+// TODO: iframes, contenteditable/designMode
+
+// Everything is done in functions in this test harness, so we have to declare
+// all the variables before use to make sure they can be reused.
+var selection;
+var testDiv, paras, detachedDiv, detachedPara1, detachedPara2,
+	foreignDoc, foreignPara1, foreignPara2, xmlDoc, xmlElement,
+	detachedXmlElement, detachedTextNode, foreignTextNode,
+	detachedForeignTextNode, xmlTextNode, detachedXmlTextNode,
+	processingInstruction, detachedProcessingInstruction, comment,
+	detachedComment, foreignComment, detachedForeignComment, xmlComment,
+	detachedXmlComment, docfrag, foreignDocfrag, xmlDocfrag, doctype,
+	foreignDoctype, xmlDoctype;
+var testRangesShort, testRanges, testPoints, testNodesShort, testNodes;
+
+function setupRangeTests() {
+	selection = getSelection();
+	testDiv = document.querySelector("#test");
+	if (testDiv) {
+		testDiv.parentNode.removeChild(testDiv);
+	}
+	testDiv = document.createElement("div");
+	testDiv.id = "test";
+	document.body.insertBefore(testDiv, document.body.firstChild);
+
+	paras = [];
+	paras.push(document.createElement("p"));
+	paras[0].setAttribute("id", "a");
+	// Test some diacritics, to make sure browsers are using code units here
+	// and not something like grapheme clusters.
+	paras[0].textContent = "A\u0308b\u0308c\u0308d\u0308e\u0308f\u0308g\u0308h\u0308\n";
+	testDiv.appendChild(paras[0]);
+
+	paras.push(document.createElement("p"));
+	paras[1].setAttribute("id", "b");
+	paras[1].setAttribute("style", "display:none");
+	paras[1].textContent = "Ijklmnop\n";
+	testDiv.appendChild(paras[1]);
+
+	paras.push(document.createElement("p"));
+	paras[2].setAttribute("id", "c");
+	paras[2].textContent = "Qrstuvwx";
+	testDiv.appendChild(paras[2]);
+
+	paras.push(document.createElement("p"));
+	paras[3].setAttribute("id", "d");
+	paras[3].setAttribute("style", "display:none");
+	paras[3].textContent = "Yzabcdef";
+	testDiv.appendChild(paras[3]);
+
+	paras.push(document.createElement("p"));
+	paras[4].setAttribute("id", "e");
+	paras[4].setAttribute("style", "display:none");
+	paras[4].textContent = "Ghijklmn";
+	testDiv.appendChild(paras[4]);
+
+	detachedDiv = document.createElement("div");
+	detachedPara1 = document.createElement("p");
+	detachedPara1.appendChild(document.createTextNode("Opqrstuv"));
+	detachedPara2 = document.createElement("p");
+	detachedPara2.appendChild(document.createTextNode("Wxyzabcd"));
+	detachedDiv.appendChild(detachedPara1);
+	detachedDiv.appendChild(detachedPara2);
+
+	// Opera doesn't automatically create a doctype for a new HTML document,
+	// contrary to spec.  It also doesn't let you add doctypes to documents
+	// after the fact through any means I've tried.  So foreignDoc in Opera
+	// will have no doctype, foreignDoctype will be null, and Opera will fail
+	// some tests somewhat mysteriously as a result.
+	foreignDoc = document.implementation.createHTMLDocument("");
+	foreignPara1 = foreignDoc.createElement("p");
+	foreignPara1.appendChild(foreignDoc.createTextNode("Efghijkl"));
+	foreignPara2 = foreignDoc.createElement("p");
+	foreignPara2.appendChild(foreignDoc.createTextNode("Mnopqrst"));
+	foreignDoc.body.appendChild(foreignPara1);
+	foreignDoc.body.appendChild(foreignPara2);
+
+	// Now we get to do really silly stuff, which nobody in the universe is
+	// ever going to actually do, but the spec defines behavior, so too bad.
+	// Testing is fun!
+	xmlDoctype = document.implementation.createDocumentType("qorflesnorf", "abcde", "x\"'y");
+	xmlDoc = document.implementation.createDocument(null, null, xmlDoctype);
+	detachedXmlElement = xmlDoc.createElement("everyone-hates-hyphenated-element-names");
+	detachedTextNode = document.createTextNode("Uvwxyzab");
+	detachedForeignTextNode = foreignDoc.createTextNode("Cdefghij");
+	detachedXmlTextNode = xmlDoc.createTextNode("Klmnopqr");
+	// PIs only exist in XML documents, so don't bother with document or
+	// foreignDoc.
+	detachedProcessingInstruction = xmlDoc.createProcessingInstruction("whippoorwill", "chirp chirp chirp");
+	detachedComment = document.createComment("Stuvwxyz");
+	// Hurrah, we finally got to "z" at the end!
+	detachedForeignComment = foreignDoc.createComment("אריה יהודה");
+	detachedXmlComment = xmlDoc.createComment("בן חיים אליעזר");
+
+	// We should also test with document fragments that actually contain stuff
+	// . . . but, maybe later.
+	docfrag = document.createDocumentFragment();
+	foreignDocfrag = foreignDoc.createDocumentFragment();
+	xmlDocfrag = xmlDoc.createDocumentFragment();
+
+	xmlElement = xmlDoc.createElement("igiveuponcreativenames");
+	xmlTextNode = xmlDoc.createTextNode("do re mi fa so la ti");
+	xmlElement.appendChild(xmlTextNode);
+	processingInstruction = xmlDoc.createProcessingInstruction("somePI", 'Did you know that ":syn sync fromstart" is very useful when using vim to edit large amounts of JavaScript embedded in HTML?');
+	xmlDoc.appendChild(xmlElement);
+	xmlDoc.appendChild(processingInstruction);
+	xmlComment = xmlDoc.createComment("I maliciously created a comment that will break incautious XML serializers, but Firefox threw an exception, so all I got was this lousy T-shirt");
+	xmlDoc.appendChild(xmlComment);
+
+	comment = document.createComment("Alphabet soup?");
+	testDiv.appendChild(comment);
+
+	foreignComment = foreignDoc.createComment('"Commenter" and "commentator" mean different things.  I\'ve seen non-native speakers trip up on this.');
+	foreignDoc.appendChild(foreignComment);
+	foreignTextNode = foreignDoc.createTextNode("I admit that I harbor doubts about whether we really need so many things to test, but it's too late to stop now.");
+	foreignDoc.body.appendChild(foreignTextNode);
+
+	doctype = document.doctype;
+	foreignDoctype = foreignDoc.doctype;
+
+	testRangesShort = [
+		// Various ranges within the text node children of different
+		// paragraphs.  All should be valid.
+		"[paras[0].firstChild, 0, paras[0].firstChild, 0]",
+		"[paras[0].firstChild, 0, paras[0].firstChild, 1]",
+		"[paras[0].firstChild, 2, paras[0].firstChild, 8]",
+		"[paras[0].firstChild, 2, paras[0].firstChild, 9]",
+		"[paras[1].firstChild, 0, paras[1].firstChild, 0]",
+		"[paras[1].firstChild, 2, paras[1].firstChild, 9]",
+		"[detachedPara1.firstChild, 0, detachedPara1.firstChild, 0]",
+		"[detachedPara1.firstChild, 2, detachedPara1.firstChild, 8]",
+		"[foreignPara1.firstChild, 0, foreignPara1.firstChild, 0]",
+		"[foreignPara1.firstChild, 2, foreignPara1.firstChild, 8]",
+		// Now try testing some elements, not just text nodes.
+		"[document.documentElement, 0, document.documentElement, 1]",
+		"[document.documentElement, 0, document.documentElement, 2]",
+		"[document.documentElement, 1, document.documentElement, 2]",
+		"[document.head, 1, document.head, 1]",
+		"[document.body, 4, document.body, 5]",
+		"[foreignDoc.documentElement, 0, foreignDoc.documentElement, 1]",
+		"[paras[0], 0, paras[0], 1]",
+		"[detachedPara1, 0, detachedPara1, 1]",
+		// Now try some ranges that span elements.
+		"[paras[0].firstChild, 0, paras[1].firstChild, 0]",
+		"[paras[0].firstChild, 0, paras[1].firstChild, 8]",
+		"[paras[0].firstChild, 3, paras[3], 1]",
+		// How about something that spans a node and its descendant?
+		"[paras[0], 0, paras[0].firstChild, 7]",
+		"[testDiv, 2, paras[4], 1]",
+		// Then a few more interesting things just for good measure.
+		"[document, 0, document, 1]",
+		"[document, 0, document, 2]",
+		"[comment, 2, comment, 3]",
+		"[testDiv, 0, comment, 5]",
+		"[foreignDoc, 1, foreignComment, 2]",
+		"[foreignDoc.body, 0, foreignTextNode, 36]",
+		"[xmlDoc, 1, xmlComment, 0]",
+		"[detachedTextNode, 0, detachedTextNode, 8]",
+		"[detachedForeignTextNode, 0, detachedForeignTextNode, 8]",
+		"[detachedXmlTextNode, 0, detachedXmlTextNode, 8]",
+		"[detachedComment, 3, detachedComment, 4]",
+		"[detachedForeignComment, 0, detachedForeignComment, 1]",
+		"[detachedXmlComment, 2, detachedXmlComment, 6]",
+		"[docfrag, 0, docfrag, 0]",
+	];
+
+	testRanges = testRangesShort.concat([
+		"[paras[1].firstChild, 0, paras[1].firstChild, 1]",
+		"[paras[1].firstChild, 2, paras[1].firstChild, 8]",
+		"[detachedPara1.firstChild, 0, detachedPara1.firstChild, 1]",
+		"[foreignPara1.firstChild, 0, foreignPara1.firstChild, 1]",
+		"[foreignDoc.head, 1, foreignDoc.head, 1]",
+		"[foreignDoc.body, 0, foreignDoc.body, 0]",
+		"[paras[0], 0, paras[0], 0]",
+		"[detachedPara1, 0, detachedPara1, 0]",
+		"[testDiv, 1, paras[2].firstChild, 5]",
+		"[document.documentElement, 1, document.body, 0]",
+		"[foreignDoc.documentElement, 1, foreignDoc.body, 0]",
+		"[document, 1, document, 2]",
+		"[paras[2].firstChild, 4, comment, 2]",
+		"[paras[3], 1, comment, 8]",
+		"[foreignDoc, 0, foreignDoc, 0]",
+		"[xmlDoc, 0, xmlDoc, 0]",
+		"[detachedForeignTextNode, 7, detachedForeignTextNode, 7]",
+		"[detachedXmlTextNode, 7, detachedXmlTextNode, 7]",
+		"[detachedComment, 5, detachedComment, 5]",
+		"[detachedForeignComment, 4, detachedForeignComment, 4]",
+		"[foreignDocfrag, 0, foreignDocfrag, 0]",
+		"[xmlDocfrag, 0, xmlDocfrag, 0]",
+	]);
+
+	testPoints = [
+		// Various positions within the page, some invalid.  Remember that
+		// paras[0] is visible, and paras[1] is display: none.
+		"[paras[0].firstChild, -1]",
+		"[paras[0].firstChild, 0]",
+		"[paras[0].firstChild, 1]",
+		"[paras[0].firstChild, 2]",
+		"[paras[0].firstChild, 8]",
+		"[paras[0].firstChild, 9]",
+		"[paras[0].firstChild, 10]",
+		"[paras[0].firstChild, 65535]",
+		"[paras[1].firstChild, -1]",
+		"[paras[1].firstChild, 0]",
+		"[paras[1].firstChild, 1]",
+		"[paras[1].firstChild, 2]",
+		"[paras[1].firstChild, 8]",
+		"[paras[1].firstChild, 9]",
+		"[paras[1].firstChild, 10]",
+		"[paras[1].firstChild, 65535]",
+		"[detachedPara1.firstChild, 0]",
+		"[detachedPara1.firstChild, 1]",
+		"[detachedPara1.firstChild, 8]",
+		"[detachedPara1.firstChild, 9]",
+		"[foreignPara1.firstChild, 0]",
+		"[foreignPara1.firstChild, 1]",
+		"[foreignPara1.firstChild, 8]",
+		"[foreignPara1.firstChild, 9]",
+		// Now try testing some elements, not just text nodes.
+		"[document.documentElement, -1]",
+		"[document.documentElement, 0]",
+		"[document.documentElement, 1]",
+		"[document.documentElement, 2]",
+		"[document.documentElement, 7]",
+		"[document.head, 1]",
+		"[document.body, 3]",
+		"[foreignDoc.documentElement, 0]",
+		"[foreignDoc.documentElement, 1]",
+		"[foreignDoc.head, 0]",
+		"[foreignDoc.body, 1]",
+		"[paras[0], 0]",
+		"[paras[0], 1]",
+		"[paras[0], 2]",
+		"[paras[1], 0]",
+		"[paras[1], 1]",
+		"[paras[1], 2]",
+		"[detachedPara1, 0]",
+		"[detachedPara1, 1]",
+		"[testDiv, 0]",
+		"[testDiv, 3]",
+		// Then a few more interesting things just for good measure.
+		"[document, -1]",
+		"[document, 0]",
+		"[document, 1]",
+		"[document, 2]",
+		"[document, 3]",
+		"[comment, -1]",
+		"[comment, 0]",
+		"[comment, 4]",
+		"[comment, 96]",
+		"[foreignDoc, 0]",
+		"[foreignDoc, 1]",
+		"[foreignComment, 2]",
+		"[foreignTextNode, 0]",
+		"[foreignTextNode, 36]",
+		"[xmlDoc, -1]",
+		"[xmlDoc, 0]",
+		"[xmlDoc, 1]",
+		"[xmlDoc, 5]",
+		"[xmlComment, 0]",
+		"[xmlComment, 4]",
+		"[processingInstruction, 0]",
+		"[processingInstruction, 5]",
+		"[processingInstruction, 9]",
+		"[detachedTextNode, 0]",
+		"[detachedTextNode, 8]",
+		"[detachedForeignTextNode, 0]",
+		"[detachedForeignTextNode, 8]",
+		"[detachedXmlTextNode, 0]",
+		"[detachedXmlTextNode, 8]",
+		"[detachedProcessingInstruction, 12]",
+		"[detachedComment, 3]",
+		"[detachedComment, 5]",
+		"[detachedForeignComment, 0]",
+		"[detachedForeignComment, 4]",
+		"[detachedXmlComment, 2]",
+		"[docfrag, 0]",
+		"[foreignDocfrag, 0]",
+		"[xmlDocfrag, 0]",
+		"[doctype, 0]",
+		"[doctype, -17]",
+		"[doctype, 1]",
+		"[foreignDoctype, 0]",
+		"[xmlDoctype, 0]",
+	];
+
+	testNodesShort = [
+		"paras[0]",
+		"paras[0].firstChild",
+		"paras[1].firstChild",
+		"foreignPara1",
+		"foreignPara1.firstChild",
+		"detachedPara1",
+		"detachedPara1.firstChild",
+		"document",
+		"detachedDiv",
+		"foreignDoc",
+		"foreignPara2",
+		"xmlDoc",
+		"xmlElement",
+		"detachedTextNode",
+		"foreignTextNode",
+		"processingInstruction",
+		"detachedProcessingInstruction",
+		"comment",
+		"detachedComment",
+		"docfrag",
+		"doctype",
+		"foreignDoctype",
+	];
+
+	testNodes = testNodesShort.concat([
+		"paras[1]",
+		"detachedPara2",
+		"detachedPara2.firstChild",
+		"testDiv",
+		"detachedXmlElement",
+		"detachedForeignTextNode",
+		"xmlTextNode",
+		"detachedXmlTextNode",
+		"xmlComment",
+		"foreignComment",
+		"detachedForeignComment",
+		"detachedXmlComment",
+		"foreignDocfrag",
+		"xmlDocfrag",
+		"xmlDoctype",
+	]);
+}
+if ("setup" in window) {
+	setup(setupRangeTests);
+} else {
+	// Presumably we're running from within an iframe or something
+	setupRangeTests();
+}
+
+/**
+ * The "length" of a node as defined by the Ranges section of DOM4.
+ */
+function nodeLength(node) {
+	// "The length of a node node depends on node:
+	//
+	// "DocumentType
+	//   "0."
+	if (node.nodeType == Node.DOCUMENT_TYPE_NODE) {
+		return 0;
+	}
+	// "Text
+	// "ProcessingInstruction
+	// "Comment
+	//   "Its length attribute value."
+	// Browsers don't historically support the length attribute on
+	// ProcessingInstruction, so to avoid spurious failures, do
+	// node.data.length instead of node.length.
+	if (node.nodeType == Node.TEXT_NODE || node.nodeType == Node.PROCESSING_INSTRUCTION_NODE || node.nodeType == Node.COMMENT_NODE) {
+		return node.data.length;
+	}
+	// "Any other node
+	//   "Its number of children."
+	return node.childNodes.length;
+}
+
+/**
+ * Returns the furthest ancestor of a Node as defined by the spec.
+ */
+function furthestAncestor(node) {
+	var root = node;
+	while (root.parentNode != null) {
+		root = root.parentNode;
+	}
+	return root;
+}
+
+/**
+ * "The ancestor containers of a Node are the Node itself and all its
+ * ancestors."
+ *
+ * Is node1 an ancestor container of node2?
+ */
+function isAncestorContainer(node1, node2) {
+	return node1 == node2 ||
+		(node2.compareDocumentPosition(node1) & Node.DOCUMENT_POSITION_CONTAINS);
+}
+
+/**
+ * Returns the first Node that's after node in tree order, or null if node is
+ * the last Node.
+ */
+function nextNode(node) {
+	if (node.hasChildNodes()) {
+		return node.firstChild;
+	}
+	return nextNodeDescendants(node);
+}
+
+/**
+ * Returns the last Node that's before node in tree order, or null if node is
+ * the first Node.
+ */
+function previousNode(node) {
+	if (node.previousSibling) {
+		node = node.previousSibling;
+		while (node.hasChildNodes()) {
+			node = node.lastChild;
+		}
+		return node;
+	}
+	return node.parentNode;
+}
+
+/**
+ * Returns the next Node that's after node and all its descendants in tree
+ * order, or null if node is the last Node or an ancestor of it.
+ */
+function nextNodeDescendants(node) {
+	while (node && !node.nextSibling) {
+		node = node.parentNode;
+	}
+	if (!node) {
+		return null;
+	}
+	return node.nextSibling;
+}
+
+/**
+ * Returns the ownerDocument of the Node, or the Node itself if it's a
+ * Document.
+ */
+function ownerDocument(node) {
+	return node.nodeType == Node.DOCUMENT_NODE
+		? node
+		: node.ownerDocument;
+}
+
+/**
+ * Returns true if ancestor is an ancestor of descendant, false otherwise.
+ */
+function isAncestor(ancestor, descendant) {
+	if (!ancestor || !descendant) {
+		return false;
+	}
+	while (descendant && descendant != ancestor) {
+		descendant = descendant.parentNode;
+	}
+	return descendant == ancestor;
+}
+
+/**
+ * Returns true if ancestor is an inclusive ancestor of descendant, false
+ * otherwise.
+ */
+function isInclusiveAncestor(ancestor, descendant) {
+	return ancestor === descendant || isAncestor(ancestor, descendant);
+}
+
+/**
+ * Returns true if descendant is a descendant of ancestor, false otherwise.
+ */
+function isDescendant(descendant, ancestor) {
+	return isAncestor(ancestor, descendant);
+}
+
+/**
+ * Returns true if descendant is an inclusive descendant of ancestor, false
+ * otherwise.
+ */
+function isInclusiveDescendant(descendant, ancestor) {
+	return descendant === ancestor || isDescendant(descendant, ancestor);
+}
+
+/**
+ * The position of two boundary points relative to one another, as defined by
+ * the spec.
+ */
+function getPosition(nodeA, offsetA, nodeB, offsetB) {
+	// "If node A is the same as node B, return equal if offset A equals offset
+	// B, before if offset A is less than offset B, and after if offset A is
+	// greater than offset B."
+	if (nodeA == nodeB) {
+		if (offsetA == offsetB) {
+			return "equal";
+		}
+		if (offsetA < offsetB) {
+			return "before";
+		}
+		if (offsetA > offsetB) {
+			return "after";
+		}
+	}
+
+	// "If node A is after node B in tree order, compute the position of (node
+	// B, offset B) relative to (node A, offset A). If it is before, return
+	// after. If it is after, return before."
+	if (nodeB.compareDocumentPosition(nodeA) & Node.DOCUMENT_POSITION_FOLLOWING) {
+		var pos = getPosition(nodeB, offsetB, nodeA, offsetA);
+		if (pos == "before") {
+			return "after";
+		}
+		if (pos == "after") {
+			return "before";
+		}
+	}
+
+	// "If node A is an ancestor of node B:"
+	if (nodeB.compareDocumentPosition(nodeA) & Node.DOCUMENT_POSITION_CONTAINS) {
+		// "Let child equal node B."
+		var child = nodeB;
+
+		// "While child is not a child of node A, set child to its parent."
+		while (child.parentNode != nodeA) {
+			child = child.parentNode;
+		}
+
+		// "If the index of child is less than offset A, return after."
+		if (indexOf(child) < offsetA) {
+			return "after";
+		}
+	}
+
+	// "Return before."
+	return "before";
+}
+
+/**
+ * "contained" as defined by DOM Range: "A Node node is contained in a range
+ * range if node's furthest ancestor is the same as range's root, and (node, 0)
+ * is after range's start, and (node, length of node) is before range's end."
+ */
+function isContained(node, range) {
+	var pos1 = getPosition(node, 0, range.startContainer, range.startOffset);
+	var pos2 = getPosition(node, nodeLength(node), range.endContainer, range.endOffset);
+
+	return furthestAncestor(node) == furthestAncestor(range.startContainer)
+		&& pos1 == "after"
+		&& pos2 == "before";
+}
+
+/**
+ * "partially contained" as defined by DOM Range: "A Node is partially
+ * contained in a range if it is an ancestor container of the range's start but
+ * not its end, or vice versa."
+ */
+function isPartiallyContained(node, range) {
+	var cond1 = isAncestorContainer(node, range.startContainer);
+	var cond2 = isAncestorContainer(node, range.endContainer);
+	return (cond1 && !cond2) || (cond2 && !cond1);
+}
+
+/**
+ * Index of a node as defined by the spec.
+ */
+function indexOf(node) {
+	if (!node.parentNode) {
+		// No preceding sibling nodes, right?
+		return 0;
+	}
+	var i = 0;
+	while (node != node.parentNode.childNodes[i]) {
+		i++;
+	}
+	return i;
+}
+
+/**
+ * extractContents() implementation, following the spec.  If an exception is
+ * supposed to be thrown, will return a string with the name (e.g.,
+ * "HIERARCHY_REQUEST_ERR") instead of a document fragment.  It might also
+ * return an arbitrary human-readable string if a condition is hit that implies
+ * a spec bug.
+ */
+function myExtractContents(range) {
+	// "If the context object's detached flag is set, raise an
+	// INVALID_STATE_ERR exception and abort these steps."
+	try {
+		range.collapsed;
+	} catch (e) {
+		return "INVALID_STATE_ERR";
+	}
+
+	// "Let frag be a new DocumentFragment whose ownerDocument is the same as
+	// the ownerDocument of the context object's start node."
+	var ownerDoc = range.startContainer.nodeType == Node.DOCUMENT_NODE
+		? range.startContainer
+		: range.startContainer.ownerDocument;
+	var frag = ownerDoc.createDocumentFragment();
+
+	// "If the context object's start and end are the same, abort this method,
+	// returning frag."
+	if (range.startContainer == range.endContainer
+	&& range.startOffset == range.endOffset) {
+		return frag;
+	}
+
+	// "Let original start node, original start offset, original end node, and
+	// original end offset be the context object's start and end nodes and
+	// offsets, respectively."
+	var originalStartNode = range.startContainer;
+	var originalStartOffset = range.startOffset;
+	var originalEndNode = range.endContainer;
+	var originalEndOffset = range.endOffset;
+
+	// "If original start node and original end node are the same, and they are
+	// a Text or Comment node:"
+	if (range.startContainer == range.endContainer
+	&& (range.startContainer.nodeType == Node.TEXT_NODE
+	|| range.startContainer.nodeType == Node.COMMENT_NODE)) {
+		// "Let clone be the result of calling cloneNode(false) on original
+		// start node."
+		var clone = originalStartNode.cloneNode(false);
+
+		// "Set the data of clone to the result of calling
+		// substringData(original start offset, original end offset − original
+		// start offset) on original start node."
+		clone.data = originalStartNode.substringData(originalStartOffset,
+			originalEndOffset - originalStartOffset);
+
+		// "Append clone as the last child of frag."
+		frag.appendChild(clone);
+
+		// "Call deleteData(original start offset, original end offset −
+		// original start offset) on original start node."
+		originalStartNode.deleteData(originalStartOffset,
+			originalEndOffset - originalStartOffset);
+
+		// "Abort this method, returning frag."
+		return frag;
+	}
+
+	// "Let common ancestor equal original start node."
+	var commonAncestor = originalStartNode;
+
+	// "While common ancestor is not an ancestor container of original end
+	// node, set common ancestor to its own parent."
+	while (!isAncestorContainer(commonAncestor, originalEndNode)) {
+		commonAncestor = commonAncestor.parentNode;
+	}
+
+	// "If original start node is an ancestor container of original end node,
+	// let first partially contained child be null."
+	var firstPartiallyContainedChild;
+	if (isAncestorContainer(originalStartNode, originalEndNode)) {
+		firstPartiallyContainedChild = null;
+	// "Otherwise, let first partially contained child be the first child of
+	// common ancestor that is partially contained in the context object."
+	} else {
+		for (var i = 0; i < commonAncestor.childNodes.length; i++) {
+			if (isPartiallyContained(commonAncestor.childNodes[i], range)) {
+				firstPartiallyContainedChild = commonAncestor.childNodes[i];
+				break;
+			}
+		}
+		if (!firstPartiallyContainedChild) {
+			throw "Spec bug: no first partially contained child!";
+		}
+	}
+
+	// "If original end node is an ancestor container of original start node,
+	// let last partially contained child be null."
+	var lastPartiallyContainedChild;
+	if (isAncestorContainer(originalEndNode, originalStartNode)) {
+		lastPartiallyContainedChild = null;
+	// "Otherwise, let last partially contained child be the last child of
+	// common ancestor that is partially contained in the context object."
+	} else {
+		for (var i = commonAncestor.childNodes.length - 1; i >= 0; i--) {
+			if (isPartiallyContained(commonAncestor.childNodes[i], range)) {
+				lastPartiallyContainedChild = commonAncestor.childNodes[i];
+				break;
+			}
+		}
+		if (!lastPartiallyContainedChild) {
+			throw "Spec bug: no last partially contained child!";
+		}
+	}
+
+	// "Let contained children be a list of all children of common ancestor
+	// that are contained in the context object, in tree order."
+	//
+	// "If any member of contained children is a DocumentType, raise a
+	// HIERARCHY_REQUEST_ERR exception and abort these steps."
+	var containedChildren = [];
+	for (var i = 0; i < commonAncestor.childNodes.length; i++) {
+		if (isContained(commonAncestor.childNodes[i], range)) {
+			if (commonAncestor.childNodes[i].nodeType
+			== Node.DOCUMENT_TYPE_NODE) {
+				return "HIERARCHY_REQUEST_ERR";
+			}
+			containedChildren.push(commonAncestor.childNodes[i]);
+		}
+	}
+
+	// "If original start node is an ancestor container of original end node,
+	// set new node to original start node and new offset to original start
+	// offset."
+	var newNode, newOffset;
+	if (isAncestorContainer(originalStartNode, originalEndNode)) {
+		newNode = originalStartNode;
+		newOffset = originalStartOffset;
+	// "Otherwise:"
+	} else {
+		// "Let reference node equal original start node."
+		var referenceNode = originalStartNode;
+
+		// "While reference node's parent is not null and is not an ancestor
+		// container of original end node, set reference node to its parent."
+		while (referenceNode.parentNode
+		&& !isAncestorContainer(referenceNode.parentNode, originalEndNode)) {
+			referenceNode = referenceNode.parentNode;
+		}
+
+		// "Set new node to the parent of reference node, and new offset to one
+		// plus the index of reference node."
+		newNode = referenceNode.parentNode;
+		newOffset = 1 + indexOf(referenceNode);
+	}
+
+	// "If first partially contained child is a Text or Comment node:"
+	if (firstPartiallyContainedChild
+	&& (firstPartiallyContainedChild.nodeType == Node.TEXT_NODE
+	|| firstPartiallyContainedChild.nodeType == Node.COMMENT_NODE)) {
+		// "Let clone be the result of calling cloneNode(false) on original
+		// start node."
+		var clone = originalStartNode.cloneNode(false);
+
+		// "Set the data of clone to the result of calling substringData() on
+		// original start node, with original start offset as the first
+		// argument and (length of original start node − original start offset)
+		// as the second."
+		clone.data = originalStartNode.substringData(originalStartOffset,
+			nodeLength(originalStartNode) - originalStartOffset);
+
+		// "Append clone as the last child of frag."
+		frag.appendChild(clone);
+
+		// "Call deleteData() on original start node, with original start
+		// offset as the first argument and (length of original start node −
+		// original start offset) as the second."
+		originalStartNode.deleteData(originalStartOffset,
+			nodeLength(originalStartNode) - originalStartOffset);
+	// "Otherwise, if first partially contained child is not null:"
+	} else if (firstPartiallyContainedChild) {
+		// "Let clone be the result of calling cloneNode(false) on first
+		// partially contained child."
+		var clone = firstPartiallyContainedChild.cloneNode(false);
+
+		// "Append clone as the last child of frag."
+		frag.appendChild(clone);
+
+		// "Let subrange be a new Range whose start is (original start node,
+		// original start offset) and whose end is (first partially contained
+		// child, length of first partially contained child)."
+		var subrange = ownerDoc.createRange();
+		subrange.setStart(originalStartNode, originalStartOffset);
+		subrange.setEnd(firstPartiallyContainedChild,
+			nodeLength(firstPartiallyContainedChild));
+
+		// "Let subfrag be the result of calling extractContents() on
+		// subrange."
+		var subfrag = myExtractContents(subrange);
+
+		// "For each child of subfrag, in order, append that child to clone as
+		// its last child."
+		for (var i = 0; i < subfrag.childNodes.length; i++) {
+			clone.appendChild(subfrag.childNodes[i]);
+		}
+	}
+
+	// "For each contained child in contained children, append contained child
+	// as the last child of frag."
+	for (var i = 0; i < containedChildren.length; i++) {
+		frag.appendChild(containedChildren[i]);
+	}
+
+	// "If last partially contained child is a Text or Comment node:"
+	if (lastPartiallyContainedChild
+	&& (lastPartiallyContainedChild.nodeType == Node.TEXT_NODE
+	|| lastPartiallyContainedChild.nodeType == Node.COMMENT_NODE)) {
+		// "Let clone be the result of calling cloneNode(false) on original
+		// end node."
+		var clone = originalEndNode.cloneNode(false);
+
+		// "Set the data of clone to the result of calling substringData(0,
+		// original end offset) on original end node."
+		clone.data = originalEndNode.substringData(0, originalEndOffset);
+
+		// "Append clone as the last child of frag."
+		frag.appendChild(clone);
+
+		// "Call deleteData(0, original end offset) on original end node."
+		originalEndNode.deleteData(0, originalEndOffset);
+	// "Otherwise, if last partially contained child is not null:"
+	} else if (lastPartiallyContainedChild) {
+		// "Let clone be the result of calling cloneNode(false) on last
+		// partially contained child."
+		var clone = lastPartiallyContainedChild.cloneNode(false);
+
+		// "Append clone as the last child of frag."
+		frag.appendChild(clone);
+
+		// "Let subrange be a new Range whose start is (last partially
+		// contained child, 0) and whose end is (original end node, original
+		// end offset)."
+		var subrange = ownerDoc.createRange();
+		subrange.setStart(lastPartiallyContainedChild, 0);
+		subrange.setEnd(originalEndNode, originalEndOffset);
+
+		// "Let subfrag be the result of calling extractContents() on
+		// subrange."
+		var subfrag = myExtractContents(subrange);
+
+		// "For each child of subfrag, in order, append that child to clone as
+		// its last child."
+		for (var i = 0; i < subfrag.childNodes.length; i++) {
+			clone.appendChild(subfrag.childNodes[i]);
+		}
+	}
+
+	// "Set the context object's start and end to (new node, new offset)."
+	range.setStart(newNode, newOffset);
+	range.setEnd(newNode, newOffset);
+
+	// "Return frag."
+	return frag;
+}
+
+/**
+ * insertNode() implementation, following the spec.  If an exception is meant
+ * to be thrown, will return a string with the expected exception name, for
+ * instance "HIERARCHY_REQUEST_ERR".
+ */
+function myInsertNode(range, node) {
+    // "If range's start node is either a ProcessingInstruction or Comment
+    // node, or a Text node whose parent is null, throw an
+    // "HierarchyRequestError" exception and terminate these steps."
+    if (range.startContainer.nodeType == Node.PROCESSING_INSTRUCTION_NODE
+            || range.startContainer.nodeType == Node.COMMENT_NODE
+            || (range.startContainer.nodeType == Node.TEXT_NODE
+                && !range.startContainer.parentNode)) {
+                    return "HIERARCHY_REQUEST_ERR";
+    }
+
+    // "Let referenceNode be null."
+    var referenceNode = null;
+
+    // "If range's start node is a Text node, set referenceNode to that Text node."
+    if (range.startContainer.nodeType == Node.TEXT_NODE) {
+        referenceNode = range.startContainer;
+
+        // "Otherwise, set referenceNode to the child of start node whose index is
+        // start offset, and null if there is no such child."
+    } else {
+        if (range.startOffset < range.startContainer.childNodes.length) {
+            referenceNode = range.startContainer.childNodes[range.startOffset];
+        } else {
+            referenceNode = null;
+        }
+    }
+
+    // "Let parent be range's start node if referenceNode is null, and
+    // referenceNode's parent otherwise."
+    var parent_ = referenceNode === null ? range.startContainer :
+        referenceNode.parentNode;
+
+    // "Ensure pre-insertion validity of node into parent before
+    // referenceNode."
+    var error = ensurePreInsertionValidity(node, parent_, referenceNode);
+    if (error) {
+        return error;
+    }
+
+    // "If range's start node is a Text node, set referenceNode to the result
+    // of splitting it with offset range's start offset."
+    if (range.startContainer.nodeType == Node.TEXT_NODE) {
+        referenceNode = range.startContainer.splitText(range.startOffset);
+    }
+
+    // "If node is referenceNode, set referenceNode to its next sibling."
+    if (node == referenceNode) {
+        referenceNode = referenceNode.nextSibling;
+    }
+
+    // "If node's parent is not null, remove node from its parent."
+    if (node.parentNode) {
+        node.parentNode.removeChild(node);
+    }
+
+    // "Let newOffset be parent's length if referenceNode is null, and
+    // referenceNode's index otherwise."
+    var newOffset = referenceNode === null ? nodeLength(parent_) :
+        indexOf(referenceNode);
+
+    // "Increase newOffset by node's length if node is a DocumentFragment node,
+    // and one otherwise."
+    newOffset += node.nodeType == Node.DOCUMENT_FRAGMENT_NODE ?
+        nodeLength(node) : 1;
+
+    // "Pre-insert node into parent before referenceNode."
+    parent_.insertBefore(node, referenceNode);
+
+    // "If range's start and end are the same, set range's end to (parent,
+    // newOffset)."
+    if (range.startContainer == range.endContainer
+    && range.startOffset == range.endOffset) {
+        range.setEnd(parent_, newOffset);
+    }
+}
+
+// To make filter() calls more readable
+function isElement(node) {
+    return node.nodeType == Node.ELEMENT_NODE;
+}
+
+function isText(node) {
+    return node.nodeType == Node.TEXT_NODE;
+}
+
+function isDoctype(node) {
+    return node.nodeType == Node.DOCUMENT_TYPE_NODE;
+}
+
+function ensurePreInsertionValidity(node, parent_, child) {
+    // "If parent is not a Document, DocumentFragment, or Element node, throw a
+    // HierarchyRequestError."
+    if (parent_.nodeType != Node.DOCUMENT_NODE
+            && parent_.nodeType != Node.DOCUMENT_FRAGMENT_NODE
+            && parent_.nodeType != Node.ELEMENT_NODE) {
+                return "HIERARCHY_REQUEST_ERR";
+    }
+
+    // "If node is a host-including inclusive ancestor of parent, throw a
+    // HierarchyRequestError."
+    //
+    // XXX Does not account for host
+    if (isInclusiveAncestor(node, parent_)) {
+        return "HIERARCHY_REQUEST_ERR";
+    }
+
+    // "If child is not null and its parent is not parent, throw a NotFoundError
+    // exception."
+    if (child && child.parentNode != parent_) {
+        return "NOT_FOUND_ERR";
+    }
+
+    // "If node is not a DocumentFragment, DocumentType, Element, Text,
+    // ProcessingInstruction, or Comment node, throw a HierarchyRequestError."
+    if (node.nodeType != Node.DOCUMENT_FRAGMENT_NODE
+            && node.nodeType != Node.DOCUMENT_TYPE_NODE
+            && node.nodeType != Node.ELEMENT_NODE
+            && node.nodeType != Node.TEXT_NODE
+            && node.nodeType != Node.PROCESSING_INSTRUCTION_NODE
+            && node.nodeType != Node.COMMENT_NODE) {
+                return "HIERARCHY_REQUEST_ERR";
+    }
+
+    // "If either node is a Text node and parent is a document, or node is a
+    // doctype and parent is not a document, throw a HierarchyRequestError."
+    if ((node.nodeType == Node.TEXT_NODE
+                && parent_.nodeType == Node.DOCUMENT_NODE)
+            || (node.nodeType == Node.DOCUMENT_TYPE_NODE
+                && parent_.nodeType != Node.DOCUMENT_NODE)) {
+                    return "HIERARCHY_REQUEST_ERR";
+    }
+
+    // "If parent is a document, and any of the statements below, switched on
+    // node, are true, throw a HierarchyRequestError."
+    if (parent_.nodeType == Node.DOCUMENT_NODE) {
+        switch (node.nodeType) {
+        case Node.DOCUMENT_FRAGMENT_NODE:
+            // "If node has more than one element child or has a Text node
+            // child.  Otherwise, if node has one element child and either
+            // parent has an element child, child is a doctype, or child is not
+            // null and a doctype is following child."
+            if ([].filter.call(node.childNodes, isElement).length > 1) {
+                return "HIERARCHY_REQUEST_ERR";
+            }
+
+            if ([].some.call(node.childNodes, isText)) {
+                return "HIERARCHY_REQUEST_ERR";
+            }
+
+            if ([].filter.call(node.childNodes, isElement).length == 1) {
+                if ([].some.call(parent_.childNodes, isElement)) {
+                    return "HIERARCHY_REQUEST_ERR";
+                }
+
+                if (child && child.nodeType == Node.DOCUMENT_TYPE_NODE) {
+                    return "HIERARCHY_REQUEST_ERR";
+                }
+
+                if (child && [].slice.call(parent_.childNodes, indexOf(child) + 1)
+                               .filter(isDoctype)) {
+                    return "HIERARCHY_REQUEST_ERR";
+                }
+            }
+            break;
+
+        case Node.ELEMENT_NODE:
+            // "parent has an element child, child is a doctype, or child is
+            // not null and a doctype is following child."
+            if ([].some.call(parent_.childNodes, isElement)) {
+                return "HIERARCHY_REQUEST_ERR";
+            }
+
+            if (child.nodeType == Node.DOCUMENT_TYPE_NODE) {
+                return "HIERARCHY_REQUEST_ERR";
+            }
+
+            if (child && [].slice.call(parent_.childNodes, indexOf(child) + 1)
+                           .filter(isDoctype)) {
+                return "HIERARCHY_REQUEST_ERR";
+            }
+            break;
+
+        case Node.DOCUMENT_TYPE_NODE:
+            // "parent has a doctype child, an element is preceding child, or
+            // child is null and parent has an element child."
+            if ([].some.call(parent_.childNodes, isDoctype)) {
+                return "HIERARCHY_REQUEST_ERR";
+            }
+
+            if (child && [].slice.call(parent_.childNodes, 0, indexOf(child))
+                           .some(isElement)) {
+                return "HIERARCHY_REQUEST_ERR";
+            }
+
+            if (!child && [].some.call(parent_.childNodes, isElement)) {
+                return "HIERARCHY_REQUEST_ERR";
+            }
+            break;
+        }
+    }
+}
+
+/**
+ * Asserts that two nodes are equal, in the sense of isEqualNode().  If they
+ * aren't, tries to print a relatively informative reason why not.  TODO: Move
+ * this to testharness.js?
+ */
+function assertNodesEqual(actual, expected, msg) {
+	if (!actual.isEqualNode(expected)) {
+		msg = "Actual and expected mismatch for " + msg + ".  ";
+
+		while (actual && expected) {
+			assert_true(actual.nodeType === expected.nodeType
+				&& actual.nodeName === expected.nodeName
+				&& actual.nodeValue === expected.nodeValue
+				&& actual.childNodes.length === expected.childNodes.length,
+				"First differing node: expected " + format_value(expected)
+				+ ", got " + format_value(actual));
+			actual = nextNode(actual);
+			expected = nextNode(expected);
+		}
+
+		assert_unreached("DOMs were not equal but we couldn't figure out why");
+	}
+}
+
+/**
+ * Given a DOMException, return the name (e.g., "HIERARCHY_REQUEST_ERR").
+ */
+function getDomExceptionName(e) {
+	var ret = null;
+	for (var prop in e) {
+		if (/^[A-Z_]+_ERR$/.test(prop) && e[prop] == e.code) {
+			return prop;
+		}
+	}
+
+	throw "Exception seems to not be a DOMException?  " + e;
+}
+
+/**
+ * Given an array of endpoint data [start container, start offset, end
+ * container, end offset], returns a Range with those endpoints.
+ */
+function rangeFromEndpoints(endpoints) {
+	// If we just use document instead of the ownerDocument of endpoints[0],
+	// WebKit will throw on setStart/setEnd.  This is a WebKit bug, but it's in
+	// range, not selection, so we don't want to fail anything for it.
+	var range = ownerDocument(endpoints[0]).createRange();
+	range.setStart(endpoints[0], endpoints[1]);
+	range.setEnd(endpoints[2], endpoints[3]);
+	return range;
+}
diff --git a/dom/imptests/html/dom/test_interface-objects.html b/dom/imptests/html/dom/test_interface-objects.html
new file mode 100644
index 0000000000..0e2bf1acdd
--- /dev/null
+++ b/dom/imptests/html/dom/test_interface-objects.html
@@ -0,0 +1,45 @@
+<!DOCTYPE html>
+<title>Interfaces</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<div id="log"></div>
+<script>
+function testInterfaceDeletable(iface) {
+  test(function() {
+    assert_true(!!window[iface], "Interface should exist.")
+    assert_true(delete window[iface], "The delete operator should return true.")
+    assert_equals(window[iface], undefined, "Interface should be gone.")
+  }, "Should be able to delete " + iface + ".")
+}
+var interfaces = [
+  "Event",
+  "CustomEvent",
+  "EventTarget",
+  "Node",
+  "Document",
+  "DOMImplementation",
+  "DocumentFragment",
+  "ProcessingInstruction",
+  "DocumentType",
+  "Element",
+  "Attr",
+  "CharacterData",
+  "Text",
+  "Comment",
+  "NodeIterator",
+  "TreeWalker",
+  "NodeFilter",
+  "NodeList",
+  "HTMLCollection",
+  "DOMStringList",
+  "DOMTokenList",
+ ];
+test(function() {
+  for (var p in window) {
+    interfaces.forEach(function(i) {
+      assert_not_equals(p, i)
+    })
+  }
+}, "Interface objects properties should not be Enumerable")
+interfaces.forEach(testInterfaceDeletable);
+</script>
diff --git a/dom/imptests/html/dom/test_interfaces.html b/dom/imptests/html/dom/test_interfaces.html
new file mode 100644
index 0000000000..9299ec8b7b
--- /dev/null
+++ b/dom/imptests/html/dom/test_interfaces.html
@@ -0,0 +1,455 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>DOM IDL tests</title>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script src=/resources/WebIDLParser.js></script>
+<script src=/resources/idlharness.js></script>
+
+<h1>DOM IDL tests</h1>
+<div id=log></div>
+
+<script type=text/plain>
+[Constructor(DOMString name)]
+interface DOMError {
+  readonly attribute DOMString name;
+};
+
+[Constructor(DOMString type, optional EventInit eventInitDict)]
+interface Event {
+  readonly attribute DOMString type;
+  readonly attribute EventTarget? target;
+  readonly attribute EventTarget? currentTarget;
+
+  const unsigned short NONE = 0;
+  const unsigned short CAPTURING_PHASE = 1;
+  const unsigned short AT_TARGET = 2;
+  const unsigned short BUBBLING_PHASE = 3;
+  readonly attribute unsigned short eventPhase;
+
+  void stopPropagation();
+  void stopImmediatePropagation();
+
+  readonly attribute boolean bubbles;
+  readonly attribute boolean cancelable;
+  void preventDefault();
+  readonly attribute boolean defaultPrevented;
+
+  [Unforgeable] readonly attribute boolean isTrusted;
+  readonly attribute /* DOMTimeStamp */ unsigned long long timeStamp;
+
+  void initEvent(DOMString type, boolean bubbles, boolean cancelable);
+};
+
+dictionary EventInit {
+  boolean bubbles = false;
+  boolean cancelable = false;
+};
+
+[Constructor(DOMString type, optional CustomEventInit eventInitDict)]
+interface CustomEvent : Event {
+  readonly attribute any detail;
+
+  void initCustomEvent(DOMString type, boolean bubbles, boolean cancelable, any details);
+};
+
+dictionary CustomEventInit : EventInit {
+  any detail = null;
+};
+
+interface EventTarget {
+  void addEventListener(DOMString type, EventListener? callback, optional boolean capture);
+  void removeEventListener(DOMString type, EventListener? callback, optional boolean capture);
+  boolean dispatchEvent(Event event);
+};
+
+[Callback]
+interface EventListener {
+  void handleEvent(Event event);
+};
+
+[NoInterfaceObject]
+interface ParentNode {
+  readonly attribute HTMLCollection children;
+  readonly attribute Element? firstElementChild;
+  readonly attribute Element? lastElementChild;
+  readonly attribute unsigned long childElementCount;
+
+  void prepend((Node or DOMString)... nodes);
+  void append((Node or DOMString)... nodes);
+};
+Document implements ParentNode;
+DocumentFragment implements ParentNode;
+Element implements ParentNode;
+
+[NoInterfaceObject]
+interface ChildNode {
+  void before((Node or DOMString)... nodes);
+  void after((Node or DOMString)... nodes);
+  void replace((Node or DOMString)... nodes);
+  void remove();
+};
+DocumentType implements ChildNode;
+Element implements ChildNode;
+CharacterData implements ChildNode;
+
+[NoInterfaceObject]
+interface NonDocumentTypeChildNode {
+  readonly attribute Element? previousElementSibling;
+  readonly attribute Element? nextElementSibling;
+};
+Element implements NonDocumentTypeChildNode;
+CharacterData implements NonDocumentTypeChildNode;
+
+[Constructor(MutationCallback callback)]
+interface MutationObserver {
+  void observe(Node target, MutationObserverInit options);
+  void disconnect();
+  sequence<MutationRecord> takeRecords();
+};
+
+callback MutationCallback = void (sequence<MutationRecord> mutations, MutationObserver observer);
+
+dictionary MutationObserverInit {
+  boolean childList = false;
+  boolean attributes = false;
+  boolean characterData = false;
+  boolean subtree = false;
+  boolean attributeOldValue = false;
+  boolean characterDataOldValue = false;
+  sequence<DOMString> attributeFilter;
+};
+
+interface MutationRecord {
+  readonly attribute DOMString type;
+  readonly attribute Node target;
+  readonly attribute NodeList addedNodes;
+  readonly attribute NodeList removedNodes;
+  readonly attribute Node? previousSibling;
+  readonly attribute Node? nextSibling;
+  readonly attribute DOMString? attributeName;
+  readonly attribute DOMString? attributeNamespace;
+  readonly attribute DOMString? oldValue;
+};
+
+interface Node : EventTarget {
+  const unsigned short ELEMENT_NODE = 1;
+  const unsigned short ATTRIBUTE_NODE = 2; // historical
+  const unsigned short TEXT_NODE = 3;
+  const unsigned short CDATA_SECTION_NODE = 4; // historical
+  const unsigned short ENTITY_REFERENCE_NODE = 5; // historical
+  const unsigned short ENTITY_NODE = 6; // historical
+  const unsigned short PROCESSING_INSTRUCTION_NODE = 7;
+  const unsigned short COMMENT_NODE = 8;
+  const unsigned short DOCUMENT_NODE = 9;
+  const unsigned short DOCUMENT_TYPE_NODE = 10;
+  const unsigned short DOCUMENT_FRAGMENT_NODE = 11;
+  const unsigned short NOTATION_NODE = 12; // historical
+  readonly attribute unsigned short nodeType;
+  readonly attribute DOMString nodeName;
+
+  readonly attribute DOMString? baseURI;
+
+  readonly attribute Document? ownerDocument;
+  readonly attribute Node? parentNode;
+  readonly attribute Element? parentElement;
+  boolean hasChildNodes();
+  readonly attribute NodeList childNodes;
+  readonly attribute Node? firstChild;
+  readonly attribute Node? lastChild;
+  readonly attribute Node? previousSibling;
+  readonly attribute Node? nextSibling;
+
+           attribute DOMString? nodeValue;
+           attribute DOMString? textContent;
+  void normalize();
+
+  Node cloneNode(optional boolean deep);
+  boolean isEqualNode(Node? node);
+
+  const unsigned short DOCUMENT_POSITION_DISCONNECTED = 0x01;
+  const unsigned short DOCUMENT_POSITION_PRECEDING = 0x02;
+  const unsigned short DOCUMENT_POSITION_FOLLOWING = 0x04;
+  const unsigned short DOCUMENT_POSITION_CONTAINS = 0x08;
+  const unsigned short DOCUMENT_POSITION_CONTAINED_BY = 0x10;
+  const unsigned short DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC = 0x20;
+  unsigned short compareDocumentPosition(Node other);
+  boolean contains(Node? other);
+
+  DOMString? lookupPrefix(DOMString? namespace);
+  DOMString? lookupNamespaceURI(DOMString? prefix);
+  boolean isDefaultNamespace(DOMString? namespace);
+
+  Node insertBefore(Node node, Node? child);
+  Node appendChild(Node node);
+  Node replaceChild(Node node, Node child);
+  Node removeChild(Node child);
+};
+
+[Constructor]
+interface Document : Node {
+  readonly attribute DOMImplementation implementation;
+  readonly attribute DOMString URL;
+  readonly attribute DOMString documentURI;
+  readonly attribute DOMString compatMode;
+  readonly attribute DOMString characterSet;
+  readonly attribute DOMString contentType;
+
+  readonly attribute DocumentType? doctype;
+  readonly attribute Element? documentElement;
+  HTMLCollection getElementsByTagName(DOMString localName);
+  HTMLCollection getElementsByTagNameNS(DOMString? namespace, DOMString localName);
+  HTMLCollection getElementsByClassName(DOMString classNames);
+  Element? getElementById(DOMString elementId);
+
+  Element createElement(DOMString localName);
+  Element createElementNS(DOMString? namespace, DOMString qualifiedName);
+  DocumentFragment createDocumentFragment();
+  Text createTextNode(DOMString data);
+  Comment createComment(DOMString data);
+  ProcessingInstruction createProcessingInstruction(DOMString target, DOMString data);
+
+  Node importNode(Node node, optional boolean deep);
+  Node adoptNode(Node node);
+
+  Event createEvent(DOMString interface);
+
+  Range createRange();
+
+  // NodeFilter.SHOW_ALL = 0xFFFFFFFF
+  NodeIterator createNodeIterator(Node root, optional unsigned long whatToShow, optional NodeFilter? filter);
+  TreeWalker createTreeWalker(Node root, optional unsigned long whatToShow, optional NodeFilter? filter);
+};
+
+interface XMLDocument : Document {};
+
+interface DOMImplementation {
+  DocumentType createDocumentType(DOMString qualifiedName, DOMString publicId, DOMString systemId);
+  XMLDocument createDocument(DOMString? namespace, [TreatNullAs=EmptyString] DOMString qualifiedName, optional DocumentType? doctype = null);
+  Document createHTMLDocument(optional DOMString title);
+
+  boolean hasFeature(DOMString feature, [TreatNullAs=EmptyString] DOMString version);
+};
+
+[Constructor]
+interface DocumentFragment : Node {
+};
+
+interface DocumentType : Node {
+  readonly attribute DOMString name;
+  readonly attribute DOMString publicId;
+  readonly attribute DOMString systemId;
+};
+
+interface Element : Node {
+  readonly attribute DOMString? namespaceURI;
+  readonly attribute DOMString? prefix;
+  readonly attribute DOMString localName;
+  readonly attribute DOMString tagName;
+
+           attribute DOMString id;
+           attribute DOMString className;
+  [PutForwards=value]
+  readonly attribute DOMTokenList classList;
+
+  readonly attribute Attr[] attributes;
+  DOMString? getAttribute(DOMString name);
+  DOMString? getAttributeNS(DOMString? namespace, DOMString localName);
+  void setAttribute(DOMString name, DOMString value);
+  void setAttributeNS(DOMString? namespace, DOMString name, DOMString value);
+  void removeAttribute(DOMString name);
+  void removeAttributeNS(DOMString? namespace, DOMString localName);
+  boolean hasAttribute(DOMString name);
+  boolean hasAttributeNS(DOMString? namespace, DOMString localName);
+
+  HTMLCollection getElementsByTagName(DOMString localName);
+  HTMLCollection getElementsByTagNameNS(DOMString? namespace, DOMString localName);
+  HTMLCollection getElementsByClassName(DOMString classNames);
+};
+
+interface Attr {
+  readonly attribute DOMString localName;
+           attribute DOMString value;
+
+  readonly attribute DOMString name;
+  readonly attribute DOMString? namespaceURI;
+  readonly attribute DOMString? prefix;
+};
+
+interface CharacterData : Node {
+  [TreatNullAs=EmptyString] attribute DOMString data;
+  readonly attribute unsigned long length;
+  DOMString substringData(unsigned long offset, unsigned long count);
+  void appendData(DOMString data);
+  void insertData(unsigned long offset, DOMString data);
+  void deleteData(unsigned long offset, unsigned long count);
+  void replaceData(unsigned long offset, unsigned long count, DOMString data);
+};
+
+[Constructor(optional DOMString data)]
+interface Text : CharacterData {
+  Text splitText(unsigned long offset);
+  readonly attribute DOMString wholeText;
+};
+
+interface ProcessingInstruction : CharacterData {
+  readonly attribute DOMString target;
+};
+
+[Constructor(optional DOMString data)]
+interface Comment : CharacterData {
+};
+
+[Constructor]
+interface Range {
+  readonly attribute Node startContainer;
+  readonly attribute unsigned long startOffset;
+  readonly attribute Node endContainer;
+  readonly attribute unsigned long endOffset;
+  readonly attribute boolean collapsed;
+  readonly attribute Node commonAncestorContainer;
+
+  void setStart(Node refNode, unsigned long offset);
+  void setEnd(Node refNode, unsigned long offset);
+  void setStartBefore(Node refNode);
+  void setStartAfter(Node refNode);
+  void setEndBefore(Node refNode);
+  void setEndAfter(Node refNode);
+  void collapse(optional boolean toStart = false);
+  void selectNode(Node refNode);
+  void selectNodeContents(Node refNode);
+
+  const unsigned short START_TO_START = 0;
+  const unsigned short START_TO_END = 1;
+  const unsigned short END_TO_END = 2;
+  const unsigned short END_TO_START = 3;
+  short compareBoundaryPoints(unsigned short how, Range sourceRange);
+
+  void deleteContents();
+  DocumentFragment extractContents();
+  DocumentFragment cloneContents();
+  void insertNode(Node node);
+  void surroundContents(Node newParent);
+
+  Range cloneRange();
+  void detach();
+
+  boolean isPointInRange(Node node, unsigned long offset);
+  short comparePoint(Node node, unsigned long offset);
+
+  boolean intersectsNode(Node node);
+
+  stringifier;
+};
+
+interface NodeIterator {
+  readonly attribute Node root;
+  readonly attribute Node? referenceNode;
+  readonly attribute boolean pointerBeforeReferenceNode;
+  readonly attribute unsigned long whatToShow;
+  readonly attribute NodeFilter? filter;
+
+  Node? nextNode();
+  Node? previousNode();
+
+  void detach();
+};
+
+interface TreeWalker {
+  readonly attribute Node root;
+  readonly attribute unsigned long whatToShow;
+  readonly attribute NodeFilter? filter;
+           attribute Node currentNode;
+
+  Node? parentNode();
+  Node? firstChild();
+  Node? lastChild();
+  Node? previousSibling();
+  Node? nextSibling();
+  Node? previousNode();
+  Node? nextNode();
+};
+
+[Callback]
+interface NodeFilter {
+  // Constants for acceptNode()
+  const unsigned short FILTER_ACCEPT = 1;
+  const unsigned short FILTER_REJECT = 2;
+  const unsigned short FILTER_SKIP = 3;
+
+  // Constants for whatToShow
+  const unsigned long SHOW_ALL = 0xFFFFFFFF;
+  const unsigned long SHOW_ELEMENT = 0x1;
+  const unsigned long SHOW_ATTRIBUTE = 0x2; // historical
+  const unsigned long SHOW_TEXT = 0x4;
+  const unsigned long SHOW_CDATA_SECTION = 0x8; // historical
+  const unsigned long SHOW_ENTITY_REFERENCE = 0x10; // historical
+  const unsigned long SHOW_ENTITY = 0x20; // historical
+  const unsigned long SHOW_PROCESSING_INSTRUCTION = 0x40;
+  const unsigned long SHOW_COMMENT = 0x80;
+  const unsigned long SHOW_DOCUMENT = 0x100;
+  const unsigned long SHOW_DOCUMENT_TYPE = 0x200;
+  const unsigned long SHOW_DOCUMENT_FRAGMENT = 0x400;
+  const unsigned long SHOW_NOTATION = 0x800; // historical
+
+  unsigned short acceptNode(Node node);
+};
+
+[ArrayClass]
+interface NodeList {
+  getter Node? item(unsigned long index);
+  readonly attribute unsigned long length;
+};
+
+interface HTMLCollection {
+  readonly attribute unsigned long length;
+  getter Element? item(unsigned long index);
+  getter object? namedItem(DOMString name); // only returns Element
+};
+
+interface DOMTokenList {
+  readonly attribute unsigned long length;
+  getter DOMString? item(unsigned long index);
+  boolean contains(DOMString token);
+  void add(DOMString... tokens);
+  void remove(DOMString... tokens);
+  boolean toggle(DOMString token, optional boolean force);
+  stringifier;
+  attribute DOMString value;
+};
+</script>
+<script>
+"use strict";
+var xmlDoc, detachedRange, element;
+var idlArray;
+setup(function() {
+	xmlDoc = document.implementation.createDocument(null, "", null);
+	detachedRange = document.createRange();
+	detachedRange.detach();
+	element = xmlDoc.createElementNS(null, "test");
+	element.setAttribute("bar", "baz");
+
+	idlArray = new IdlArray();
+	idlArray.add_idls(document.querySelector("script[type=text\\/plain]").textContent);
+	idlArray.add_objects({
+		Event: ['document.createEvent("Event")', 'new Event("foo")'],
+		CustomEvent: ['new CustomEvent("foo")'],
+		XMLDocument: ['xmlDoc'],
+		DOMImplementation: ['document.implementation'],
+		DocumentFragment: ['document.createDocumentFragment()'],
+		DocumentType: ['document.doctype'],
+		Element: ['element'],
+		Attr: ['document.querySelector("[id]").attributes[0]'],
+		Text: ['document.createTextNode("abc")'],
+		ProcessingInstruction: ['xmlDoc.createProcessingInstruction("abc", "def")'],
+		Comment: ['document.createComment("abc")'],
+		Range: ['document.createRange()', 'detachedRange'],
+		NodeIterator: ['document.createNodeIterator(document.body, NodeFilter.SHOW_ALL, null, false)'],
+		TreeWalker: ['document.createTreeWalker(document.body, NodeFilter.SHOW_ALL, null, false)'],
+		NodeList: ['document.querySelectorAll("script")'],
+		HTMLCollection: ['document.body.children'],
+		DOMTokenList: ['document.body.classList'],
+	});
+});
+idlArray.test();
+</script>
diff --git a/dom/imptests/html/html/browsers/the-window-object/test_window-named-properties.html b/dom/imptests/html/html/browsers/the-window-object/test_window-named-properties.html
new file mode 100644
index 0000000000..b01e24da98
--- /dev/null
+++ b/dom/imptests/html/html/browsers/the-window-object/test_window-named-properties.html
@@ -0,0 +1,69 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>Changes to named properties of the window object</title>
+<link rel="author" title="Ms2ger" href="ms2ger@gmail.com">
+<link rel="author" title="Boris Zbarsky" href="bzbarsky@mit.edu">
+<link rel="help" href="http://www.whatwg.org/html/#window">
+<link rel="help" href="http://www.whatwg.org/html/#dom-window-nameditem">
+<link rel="help" href="http://dev.w3.org/2006/webapi/WebIDL/#named-properties-object">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<div id=log></div>
+<iframe name="bar"></iframe>
+<iframe name="constructor"></iframe>
+<script>
+function assert_data_propdesc(pd, Writable, Enumerable, Configurable) {
+  assert_equals(typeof pd, "object");
+  assert_equals(pd.writable, Writable);
+  assert_equals(pd.enumerable, Enumerable);
+  assert_equals(pd.configurable, Configurable);
+}
+test(function() {
+  assert_true("bar" in window, "bar not in window");
+  assert_equals(window["bar"],
+                document.getElementsByTagName("iframe")[0].contentWindow);
+}, "Static name");
+test(function() {
+  assert_true("bar" in Window.prototype, "bar in Window.prototype");
+  assert_false(Window.prototype.hasOwnProperty("bar"), "Window.prototype.hasOwnProperty(\"bar\")");
+
+  var gsp = Object.getPrototypeOf(Object.getPrototypeOf(window));
+  assert_true("bar" in gsp, "bar in gsp");
+  assert_true(gsp.hasOwnProperty("bar"), "gsp.hasOwnProperty(\"bar\")");
+  assert_data_propdesc(Object.getOwnPropertyDescriptor(gsp, "bar"),
+                       true, false, true);
+}, "Static name on the prototype");
+test(function() {
+  assert_equals(window.constructor, Window);
+  assert_false(window.hasOwnProperty("constructor"), "window.constructor should not be an own property.");
+
+  var proto = Object.getPrototypeOf(window);
+  assert_equals(proto.constructor, Window);
+  assert_true("constructor" in proto, "constructor in proto");
+  assert_data_propdesc(Object.getOwnPropertyDescriptor(proto, "constructor"),
+                       true, false, true);
+
+  var gsp = Object.getPrototypeOf(proto);
+  assert_true("constructor" in gsp, "constructor in gsp");
+  assert_false(gsp.hasOwnProperty("constructor"), "gsp.hasOwnProperty(\"constructor\")");
+  assert_equals(Object.getOwnPropertyDescriptor(gsp, "constructor"), undefined)
+}, "constructor");
+var t = async_test("Dynamic name")
+var t2 = async_test("Ghost name")
+t.step(function() {
+  var iframe = document.getElementsByTagName("iframe")[0];
+  iframe.setAttribute("src", "data:text/html,<script>window.name='foo'<\/script>");
+  iframe.onload = function() {
+    t.step(function() {
+      assert_true("foo" in window, "foo not in window");
+      assert_equals(window["foo"], iframe.contentWindow);
+    });
+    t.done();
+    t2.step(function() {
+      assert_false("bar" in window, "bar still in window");
+      assert_equals(window["bar"], undefined);
+    });
+    t2.done();
+  };
+});
+</script>
diff --git a/dom/imptests/html/html/dom/documents/dta/test_nameditem-06.html b/dom/imptests/html/html/dom/documents/dta/test_nameditem-06.html
new file mode 100644
index 0000000000..3fd3d474a4
--- /dev/null
+++ b/dom/imptests/html/html/dom/documents/dta/test_nameditem-06.html
@@ -0,0 +1,104 @@
+<!DOCTYPE html>
+<meta charset=utf-8>
+<title>Named items: imgs</title>
+<link rel="author" title="Ms2ger" href="mailto:ms2ger@gmail.com">
+<link rel="help" href="http://www.whatwg.org/html/#dom-document-nameditem">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<div id="log"></div>
+<div id="test">
+<img name=test1>
+
+<img name=test2>
+<img name=test2>
+
+<img id=test3>
+
+<img id=test4>
+<img id=test4>
+
+<img name=test5>
+<img id=test5>
+
+<img id=test6>
+<img name=test6>
+
+<img id=test7 name=fail>
+
+<img name=test8 id=fail>
+</div>
+<script>
+test(function() {
+  var img = document.getElementsByTagName("img")[0];
+  assert_equals(img.name, "test1");
+
+  assert_true("test1" in document, '"test1" in document should be true');
+  assert_equals(document.test1, img);
+}, "If there is one img, it should be returned (name)");
+
+test(function() {
+  var img1 = document.getElementsByTagName("img")[1];
+  assert_equals(img1.name, "test2");
+  var img2 = document.getElementsByTagName("img")[2];
+  assert_equals(img2.name, "test2");
+
+  assert_true("test2" in document, '"test2" in document should be true');
+  var collection = document.test2;
+  assert_class_string(collection, "HTMLCollection", "collection should be an HTMLCollection");
+  assert_array_equals(collection, [img1, img2]);
+}, "If there are two imgs, a collection should be returned. (name)");
+
+test(function() {
+  var img = document.getElementsByTagName("img")[3];
+  assert_equals(img.id, "test3");
+
+  assert_false("test3" in document, '"test3" in document should be false');
+  assert_equals(document.test3, undefined);
+}, "If there is one img, it should not be returned (id)");
+
+test(function() {
+  var img1 = document.getElementsByTagName("img")[4];
+  assert_equals(img1.id, "test4");
+  var img2 = document.getElementsByTagName("img")[5];
+  assert_equals(img2.id, "test4");
+
+  assert_false("test4" in document, '"test4" in document should be false');
+  assert_equals(document.test4, undefined);
+}, "If there are two imgs, nothing should be returned. (id)");
+
+test(function() {
+  var img1 = document.getElementsByTagName("img")[6];
+  assert_equals(img1.name, "test5");
+  var img2 = document.getElementsByTagName("img")[7];
+  assert_equals(img2.id, "test5");
+
+  assert_true("test5" in document, '"test5" in document should be true');
+  assert_equals(document.test5, img1);
+}, "If there are two imgs, the one with a name should be returned. (name and id)");
+
+test(function() {
+  var img1 = document.getElementsByTagName("img")[8];
+  assert_equals(img1.id, "test6");
+  var img2 = document.getElementsByTagName("img")[9];
+  assert_equals(img2.name, "test6");
+
+  assert_true("test6" in document, '"test6" in document should be true');
+  assert_equals(document.test6, img2);
+}, "If there are two imgs, the one with a name should be returned. (id and name)");
+
+test(function() {
+  var img = document.getElementsByTagName("img")[10];
+  assert_equals(img.id, "test7");
+
+  assert_true("test7" in document, '"test7" in document should be true');
+  assert_equals(document.test7, img);
+}, "A name should affect getting an img by id");
+
+test(function() {
+  var img = document.getElementsByTagName("img")[11];
+  assert_equals(img.name, "test8");
+
+  assert_true("test8" in document, '"test8" in document should be true');
+  assert_equals(document.test8, img);
+}, "An id shouldn't affect getting an img by name");
+</script>
diff --git a/dom/imptests/html/html/dom/elements/global-attributes/reftest-stylo.list b/dom/imptests/html/html/dom/elements/global-attributes/reftest-stylo.list
new file mode 100644
index 0000000000..4e76b85322
--- /dev/null
+++ b/dom/imptests/html/html/dom/elements/global-attributes/reftest-stylo.list
@@ -0,0 +1,59 @@
+# DO NOT EDIT! This is a auto-generated temporary list for Stylo testing
+# THIS FILE IS AUTOGENERATED BY importTestsuite.py - DO NOT EDIT
+
+== dir_auto-contained-bdi-L.html dir_auto-contained-bdi-L.html
+== dir_auto-contained-bdi-R.html dir_auto-contained-bdi-R.html
+== dir_auto-contained-dir_auto-L.html dir_auto-contained-dir_auto-L.html
+== dir_auto-contained-dir_auto-R.html dir_auto-contained-dir_auto-R.html
+== dir_auto-contained-dir-L.html dir_auto-contained-dir-L.html
+== dir_auto-contained-dir-R.html dir_auto-contained-dir-R.html
+== dir_auto-contained-L.html dir_auto-contained-L.html
+== dir_auto-contained-R.html dir_auto-contained-R.html
+== dir_auto-contained-script-L.html dir_auto-contained-script-L.html
+== dir_auto-contained-script-R.html dir_auto-contained-script-R.html
+== dir_auto-contained-style-L.html dir_auto-contained-style-L.html
+== dir_auto-contained-style-R.html dir_auto-contained-style-R.html
+== dir_auto-contained-textarea-L.html dir_auto-contained-textarea-L.html
+== dir_auto-contained-textarea-R.html dir_auto-contained-textarea-R.html
+== dir_auto-EN-L.html dir_auto-EN-L.html
+== dir_auto-EN-R.html dir_auto-EN-R.html
+== dir_auto-input-EN-L.html dir_auto-input-EN-L.html
+== dir_auto-input-EN-R.html dir_auto-input-EN-R.html
+== dir_auto-input-L.html dir_auto-input-L.html
+== dir_auto-input-N-EN.html dir_auto-input-N-EN.html
+== dir_auto-input-N-EN-L.html dir_auto-input-N-EN-L.html
+== dir_auto-input-N-EN-R.html dir_auto-input-N-EN-R.html
+== dir_auto-input-N-L.html dir_auto-input-N-L.html
+== dir_auto-input-N-R.html dir_auto-input-N-R.html
+== dir_auto-input-R.html dir_auto-input-R.html
+== dir_auto-input-script-EN-L.html dir_auto-input-script-EN-L.html
+== dir_auto-input-script-EN-R.html dir_auto-input-script-EN-R.html
+== dir_auto-input-script-L.html dir_auto-input-script-L.html
+== dir_auto-input-script-N-EN.html dir_auto-input-script-N-EN.html
+== dir_auto-input-script-N-EN-L.html dir_auto-input-script-N-EN-L.html
+== dir_auto-input-script-N-EN-R.html dir_auto-input-script-N-EN-R.html
+== dir_auto-input-script-N-L.html dir_auto-input-script-N-L.html
+== dir_auto-input-script-N-R.html dir_auto-input-script-N-R.html
+== dir_auto-input-script-R.html dir_auto-input-script-R.html
+== dir_auto-isolate.html dir_auto-isolate.html
+== dir_auto-L.html dir_auto-L.html
+== dir_auto-N-EN.html dir_auto-N-EN.html
+== dir_auto-N-EN-L.html dir_auto-N-EN-L.html
+== dir_auto-N-EN-R.html dir_auto-N-EN-R.html
+== dir_auto-N-L.html dir_auto-N-L.html
+== dir_auto-N-R.html dir_auto-N-R.html
+== dir_auto-pre-mixed.html dir_auto-pre-mixed.html
+== dir_auto-pre-N-between-Rs.html dir_auto-pre-N-between-Rs.html
+== dir_auto-pre-N-EN.html dir_auto-pre-N-EN.html
+== dir_auto-R.html dir_auto-R.html
+== dir_auto-textarea-mixed.html dir_auto-textarea-mixed.html
+fails-if(B2G||Mulet||(Android&&asyncPan)) == dir_auto-textarea-N-between-Rs.html dir_auto-textarea-N-between-Rs.html
+# B2G scrollbar on opposite side
+== dir_auto-textarea-N-EN.html dir_auto-textarea-N-EN.html
+== dir_auto-textarea-script-mixed.html dir_auto-textarea-script-mixed.html
+fails-if(B2G||Mulet||(Android&&asyncPan)) == dir_auto-textarea-script-N-between-Rs.html dir_auto-textarea-script-N-between-Rs.html
+# B2G scrollbar on reference only
+== dir_auto-textarea-script-N-EN.html dir_auto-textarea-script-N-EN.html
+== lang-xyzzy.html lang-xyzzy.html
+== lang-xmllang-01.html lang-xmllang-01.html
+== style-01.html style-01.html
diff --git a/dom/imptests/html/html/dom/elements/global-attributes/reftest.list b/dom/imptests/html/html/dom/elements/global-attributes/reftest.list
new file mode 100644
index 0000000000..a58929e921
--- /dev/null
+++ b/dom/imptests/html/html/dom/elements/global-attributes/reftest.list
@@ -0,0 +1,56 @@
+# THIS FILE IS AUTOGENERATED BY importTestsuite.py - DO NOT EDIT
+
+== dir_auto-contained-bdi-L.html dir_auto-contained-bdi-L-ref.html
+== dir_auto-contained-bdi-R.html dir_auto-contained-bdi-R-ref.html
+== dir_auto-contained-dir_auto-L.html dir_auto-contained-dir_auto-L-ref.html
+== dir_auto-contained-dir_auto-R.html dir_auto-contained-dir_auto-R-ref.html
+== dir_auto-contained-dir-L.html dir_auto-contained-dir-L-ref.html
+== dir_auto-contained-dir-R.html dir_auto-contained-dir-R-ref.html
+== dir_auto-contained-L.html dir_auto-contained-L-ref.html
+== dir_auto-contained-R.html dir_auto-contained-R-ref.html
+== dir_auto-contained-script-L.html dir_auto-contained-script-L-ref.html
+== dir_auto-contained-script-R.html dir_auto-contained-script-R-ref.html
+== dir_auto-contained-style-L.html dir_auto-contained-style-L-ref.html
+== dir_auto-contained-style-R.html dir_auto-contained-style-R-ref.html
+== dir_auto-contained-textarea-L.html dir_auto-contained-textarea-L-ref.html
+== dir_auto-contained-textarea-R.html dir_auto-contained-textarea-R-ref.html
+== dir_auto-EN-L.html dir_auto-EN-L-ref.html
+== dir_auto-EN-R.html dir_auto-EN-R-ref.html
+== dir_auto-input-EN-L.html dir_auto-input-EN-L-ref.html
+== dir_auto-input-EN-R.html dir_auto-input-EN-R-ref.html
+== dir_auto-input-L.html dir_auto-input-L-ref.html
+== dir_auto-input-N-EN.html dir_auto-input-N-EN-ref.html
+== dir_auto-input-N-EN-L.html dir_auto-input-N-EN-L-ref.html
+== dir_auto-input-N-EN-R.html dir_auto-input-N-EN-R-ref.html
+== dir_auto-input-N-L.html dir_auto-input-N-L-ref.html
+== dir_auto-input-N-R.html dir_auto-input-N-R-ref.html
+== dir_auto-input-R.html dir_auto-input-R-ref.html
+== dir_auto-input-script-EN-L.html dir_auto-input-script-EN-L-ref.html
+== dir_auto-input-script-EN-R.html dir_auto-input-script-EN-R-ref.html
+== dir_auto-input-script-L.html dir_auto-input-script-L-ref.html
+== dir_auto-input-script-N-EN.html dir_auto-input-script-N-EN-ref.html
+== dir_auto-input-script-N-EN-L.html dir_auto-input-script-N-EN-L-ref.html
+== dir_auto-input-script-N-EN-R.html dir_auto-input-script-N-EN-R-ref.html
+== dir_auto-input-script-N-L.html dir_auto-input-script-N-L-ref.html
+== dir_auto-input-script-N-R.html dir_auto-input-script-N-R-ref.html
+== dir_auto-input-script-R.html dir_auto-input-script-R-ref.html
+== dir_auto-isolate.html dir_auto-isolate-ref.html
+== dir_auto-L.html dir_auto-L-ref.html
+== dir_auto-N-EN.html dir_auto-N-EN-ref.html
+== dir_auto-N-EN-L.html dir_auto-N-EN-L-ref.html
+== dir_auto-N-EN-R.html dir_auto-N-EN-R-ref.html
+== dir_auto-N-L.html dir_auto-N-L-ref.html
+== dir_auto-N-R.html dir_auto-N-R-ref.html
+== dir_auto-pre-mixed.html dir_auto-pre-mixed-ref.html
+== dir_auto-pre-N-between-Rs.html dir_auto-pre-N-between-Rs-ref.html
+== dir_auto-pre-N-EN.html dir_auto-pre-N-EN-ref.html
+== dir_auto-R.html dir_auto-R-ref.html
+== dir_auto-textarea-mixed.html dir_auto-textarea-mixed-ref.html
+fails-if(Android&&asyncPan) == dir_auto-textarea-N-between-Rs.html dir_auto-textarea-N-between-Rs-ref.html
+== dir_auto-textarea-N-EN.html dir_auto-textarea-N-EN-ref.html
+== dir_auto-textarea-script-mixed.html dir_auto-textarea-script-mixed-ref.html
+fails-if(Android&&asyncPan) == dir_auto-textarea-script-N-between-Rs.html dir_auto-textarea-script-N-between-Rs-ref.html
+== dir_auto-textarea-script-N-EN.html dir_auto-textarea-script-N-EN-ref.html
+== lang-xyzzy.html lang-xyzzy-ref.html
+== lang-xmllang-01.html lang-xmllang-01-ref.html
+== style-01.html style-01-ref.html
diff --git a/dom/imptests/html/js/builtins/test_WeakMap.prototype-properties.html b/dom/imptests/html/js/builtins/test_WeakMap.prototype-properties.html
new file mode 100644
index 0000000000..0bdb6bb86d
--- /dev/null
+++ b/dom/imptests/html/js/builtins/test_WeakMap.prototype-properties.html
@@ -0,0 +1,103 @@
+<!doctype html>
+<title>WeakMap.prototype</title>
+<link rel=author href=mailto:Ms2ger@gmail.com title=Ms2ger>
+<link rel=help href=http://people.mozilla.org/~jorendorff/es6-draft.html#sec-15.15.5>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<div id=log></div>
+<script>
+function assert_propdesc(obj, prop, Writable, Enumerable, Configurable) {
+  var propdesc = Object.getOwnPropertyDescriptor(obj, prop);
+  assert_equals(typeof propdesc, "object");
+  assert_equals(propdesc.writable, Writable, "[[Writable]]");
+  assert_equals(propdesc.enumerable, Enumerable, "[[Enumerable]]");
+  assert_equals(propdesc.configurable, Configurable, "[[Configurable]]");
+}
+
+function test_length(fun, expected) {
+  test(function() {
+    assert_propdesc(WeakMap.prototype[fun], "length", false, false, false);
+    assert_equals(WeakMap.prototype[fun].length, expected);
+  }, "WeakMap.prototype." + fun + ".length")
+}
+
+function test_thisval(fun, args) {
+  // Step 1-2
+  test(function() {
+    assert_throws(new TypeError(), function() {
+      WeakMap.prototype[fun].apply(null, args);
+    });
+    assert_throws(new TypeError(), function() {
+      WeakMap.prototype[fun].apply(undefined, args);
+    });
+  }, "WeakMap.prototype." + fun + ": ToObject on this")
+  // Step 3
+  test(function() {
+    assert_throws(new TypeError(), function() {
+      WeakMap.prototype[fun].apply({}, args);
+    });
+  }, "WeakMap.prototype." + fun + ": this has no [[WeakMapData]] internal property")
+}
+
+// In every case, the length property of a built-in Function object described
+// in this clause has the attributes { [[Writable]]: false, [[Enumerable]]:
+// false, [[Configurable]]: false }. Every other property described in this
+// clause has the attributes { [[Writable]]: true, [[Enumerable]]: false,
+// [[Configurable]]: true } unless otherwise specified.
+
+test(function() {
+  assert_equals(Object.getPrototypeOf(WeakMap.prototype), Object.prototype);
+}, "The value of the [[Prototype]] internal property of the WeakMap prototype object is the standard built-in Object prototype object (15.2.4).")
+
+// 15.15.5.1 WeakMap.prototype.constructor
+test(function() {
+  assert_equals(WeakMap.prototype.constructor, WeakMap);
+  assert_propdesc(WeakMap.prototype, "constructor", true, false, true);
+}, "The initial value of WeakMap.prototype.constructor is the built-in WeakMap constructor.")
+
+// 15.15.5.2 WeakMap.prototype.delete ( key )
+test(function() {
+  assert_propdesc(WeakMap.prototype, "delete", true, false, true);
+  test_length("delete", 1);
+  // Step 1-3
+  test_thisval("delete", [{}]);
+}, "WeakMap.prototype.delete")
+
+// 15.15.5.3 WeakMap.prototype.get ( key )
+test(function() {
+  assert_propdesc(WeakMap.prototype, "get", true, false, true);
+  test_length("get", 1);
+  // Step 1-3
+  test_thisval("get", [{}]);
+
+  // Step 8
+  test(function() {
+    var wm = new WeakMap();
+    var key = {};
+    var res = wm.get({}, {});
+    assert_equals(res, undefined);
+  }, "WeakMap.prototype.get: return undefined");
+}, "WeakMap.prototype.get")
+
+// 15.14.5.4 Map.prototype.has ( key )
+test(function() {
+  assert_propdesc(WeakMap.prototype, "has", true, false, true);
+  test_length("has", 1);
+  // Step 1-3
+  test_thisval("has", [{}]);
+}, "WeakMap.prototype.has")
+
+// 15.14.5.5 Map.prototype.set ( key , value )
+test(function() {
+  assert_propdesc(WeakMap.prototype, "set", true, false, true);
+  test_length("set", 2);
+  // Step 1-3
+  test_thisval("set", [{}, {}]);
+}, "WeakMap.prototype.set")
+
+// 15.15.5.6 Map.prototype.@@toStringTag
+test(function() {
+  assert_class_string(new WeakMap(), "WeakMap");
+  assert_class_string(WeakMap.prototype, "WeakMap");
+}, "WeakMap.prototype.@@toStringTag")
+</script>
diff --git a/dom/imptests/html/mochitest.ini b/dom/imptests/html/mochitest.ini
new file mode 100644
index 0000000000..87b958f0e4
--- /dev/null
+++ b/dom/imptests/html/mochitest.ini
@@ -0,0 +1,24 @@
+# THIS FILE IS AUTOGENERATED BY importTestsuite.py - DO NOT EDIT
+[DEFAULT]
+support-files =
+  webgl/common.js
+
+[typedarrays/test_constructors.html]
+[webgl/test_bufferSubData.html]
+subsuite = gpu
+skip-if = toolkit == 'android' #android(WebGL)
+[webgl/test_compressedTexImage2D.html]
+subsuite = gpu
+skip-if = toolkit == 'android' #android(WebGL)
+[webgl/test_compressedTexSubImage2D.html]
+subsuite = gpu
+skip-if = true # Bug 1226336
+[webgl/test_texImage2D.html]
+subsuite = gpu
+skip-if = toolkit == 'android' #android(WebGL)
+[webgl/test_texSubImage2D.html]
+subsuite = gpu
+skip-if = toolkit == 'android' #android(WebGL)
+[webgl/test_uniformMatrixNfv.html]
+subsuite = gpu
+skip-if = toolkit == 'android' #android(WebGL)
diff --git a/dom/imptests/html/typedarrays/test_constructors.html b/dom/imptests/html/typedarrays/test_constructors.html
new file mode 100644
index 0000000000..60e0dc8fe8
--- /dev/null
+++ b/dom/imptests/html/typedarrays/test_constructors.html
@@ -0,0 +1,48 @@
+<!doctype html>
+<title>Typed Array constructors</title>
+<link rel=author href=mailto:Ms2ger@gmail.com title=Ms2ger>
+<link rel=help href=https://www.khronos.org/registry/typedarray/specs/latest/#7>
+<link rel=help href=http://dev.w3.org/2006/webapi/WebIDL/#dfn-overload-resolution-algorithm>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+
+<div id=log></div>
+<script>
+var args = [
+  /* numbers */
+  [NaN, 0], [+Infinity, 0], [-Infinity, 0], [+0, 0], [-0, 0], // Step 2
+  [-0.4, 0], [-0.9, 0], [1.1, 1], [2.9, 2], // Step 3
+  [1, 1], [-0xF1000000, 0xF000000], // Step 4
+  /* strings */
+  ["1", 1], ["1e2", 100],
+  /* null, undefined, booleans */
+  [undefined, 0], [null, 0], [false, 0], [true, 1],
+  /* objects */
+  [{}, 0], [{ length: 2, 0: 0, 1: 0 }, 0], [[0, 0], 2]
+];
+var interfaces = [
+  "Int8Array", "Uint8Array", "Uint8ClampedArray", "Int16Array", "Uint16Array",
+  "Int32Array", "Uint32Array", "Float32Array", "Float64Array"
+];
+
+test(function() {
+  interfaces.concat(["ArrayBuffer", "DataView"]).forEach(function(i) {
+    test(function() {
+      // XXX The spec is wrong here.
+      assert_throws(new TypeError(), function() {
+        new window[i]();
+      });
+    }, "Constructing interface " + i + " with no arguments should throw.");
+  });
+  interfaces.forEach(function(i) {
+    args.forEach(function(arg, j) {
+      var input = arg[0], expected = arg[1];
+      test(function() {
+        var ta = new window[i](input);
+        assert_equals(ta.length, expected);
+      }, "The argument " + format_value(input) + " (" + j + ") should be interpreted as " +
+         expected + " for interface " + i + ".");
+    });
+  });
+});
+</script>
diff --git a/dom/imptests/html/webgl/common.js b/dom/imptests/html/webgl/common.js
new file mode 100644
index 0000000000..416c21ce93
--- /dev/null
+++ b/dom/imptests/html/webgl/common.js
@@ -0,0 +1,13 @@
+function getGl() {
+  var c = document.createElement("canvas");
+  var gl = c.getContext("experimental-webgl");
+  assert_true(!!gl, "Should be able to get a context.");
+  return gl;
+}
+
+function shouldGenerateGLError(cx, glError, fn) {
+  test(function() {
+    fn();
+    assert_equals(cx.getError(), glError);
+  }, "Calling " + fn + " should generate a " + glError + " error.");
+}
diff --git a/dom/imptests/html/webgl/test_bufferSubData.html b/dom/imptests/html/webgl/test_bufferSubData.html
new file mode 100644
index 0000000000..a97df9062d
--- /dev/null
+++ b/dom/imptests/html/webgl/test_bufferSubData.html
@@ -0,0 +1,26 @@
+<!doctype html>
+<title>bufferSubData</title>
+<link rel=author href=mailto:Ms2ger@gmail.com title=Ms2ger>
+<link rel=help href=https://www.khronos.org/registry/webgl/specs/latest/#5.14.5>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script src=common.js></script>
+
+<div id=log></div>
+<script>
+test(function() {
+  var gl = getGl();
+  assert_equals(gl.getError(), WebGLRenderingContext.NO_ERROR);
+
+  var b = gl.createBuffer();
+  gl.bindBuffer(gl.ARRAY_BUFFER, b);
+
+  var a = new Float32Array(1);
+  gl.bufferData(gl.ARRAY_BUFFER, a, gl.STATIC_DRAW);
+
+  var nan = 0 / 0;
+  gl.bufferSubData(gl.ARRAY_BUFFER, nan, a);
+
+  assert_equals(gl.getError(), WebGLRenderingContext.NO_ERROR);
+});
+</script>
diff --git a/dom/imptests/html/webgl/test_compressedTexImage2D.html b/dom/imptests/html/webgl/test_compressedTexImage2D.html
new file mode 100644
index 0000000000..b0a031add0
--- /dev/null
+++ b/dom/imptests/html/webgl/test_compressedTexImage2D.html
@@ -0,0 +1,30 @@
+<!doctype html>
+<title>compressedTexImage2D</title>
+<link rel=author href=mailto:Ms2ger@gmail.com title=Ms2ger>
+<link rel=help href=https://www.khronos.org/registry/webgl/specs/latest/#5.14.8>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script src=common.js></script>
+
+<div id=log></div>
+<script>
+test(function() {
+  var COMPRESSED_RGB_S3TC_DXT1_EXT = 0x83F0;
+  var gl = getGl();
+
+  var tex = gl.createTexture();
+  gl.bindTexture(gl.TEXTURE_2D, tex);
+
+  shouldGenerateGLError(gl, gl.INVALID_ENUM, function() {
+    gl.compressedTexImage2D(gl.TEXTURE_2D, 0, COMPRESSED_RGB_S3TC_DXT1_EXT, 4, 4, 0, new Uint8Array(8));
+  });
+  shouldGenerateGLError(gl, gl.INVALID_ENUM, function() {
+    gl.compressedTexImage2D(gl.TEXTURE_2D, 0, COMPRESSED_RGB_S3TC_DXT1_EXT, 4, 4, 0, new Uint8Array(8), null);
+  });
+  test(function() {
+    assert_throws(new TypeError(), function() {
+      gl.compressedTexImage2D(gl.TEXTURE_2D, 0, COMPRESSED_RGB_S3TC_DXT1_EXT, 4, 4, 0);
+    });
+  }, "Should throw a TypeError when passing too few arguments.");
+});
+</script>
diff --git a/dom/imptests/html/webgl/test_compressedTexSubImage2D.html b/dom/imptests/html/webgl/test_compressedTexSubImage2D.html
new file mode 100644
index 0000000000..539f9e17f8
--- /dev/null
+++ b/dom/imptests/html/webgl/test_compressedTexSubImage2D.html
@@ -0,0 +1,30 @@
+<!doctype html>
+<title>compressedTexSubImage2D</title>
+<link rel=author href=mailto:Ms2ger@gmail.com title=Ms2ger>
+<link rel=help href=https://www.khronos.org/registry/webgl/specs/latest/#5.14.8>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script src=common.js></script>
+
+<div id=log></div>
+<script>
+test(function() {
+  var COMPRESSED_RGB_S3TC_DXT1_EXT = 0x83F0;
+  var gl = getGl();
+
+  var tex = gl.createTexture();
+  gl.bindTexture(gl.TEXTURE_2D, tex);
+
+  shouldGenerateGLError(gl, gl.INVALID_ENUM, function() {
+    gl.compressedTexSubImage2D(gl.TEXTURE_2D, 0, 0, 0, 10, 10, COMPRESSED_RGB_S3TC_DXT1_EXT, new Uint8Array(8));
+  });
+  shouldGenerateGLError(gl, gl.INVALID_ENUM, function() {
+    gl.compressedTexSubImage2D(gl.TEXTURE_2D, 0, 0, 0, 10, 10, COMPRESSED_RGB_S3TC_DXT1_EXT, new Uint8Array(8), null);
+  });
+  test(function() {
+    assert_throws(new TypeError(), function() {
+      gl.compressedTexSubImage2D(gl.TEXTURE_2D, 0, 0, 0, 10, 10, COMPRESSED_RGB_S3TC_DXT1_EXT);
+    });
+  }, "Should throw a TypeError when passing too few arguments.");
+});
+</script>
diff --git a/dom/imptests/html/webgl/test_texImage2D.html b/dom/imptests/html/webgl/test_texImage2D.html
new file mode 100644
index 0000000000..2f769160df
--- /dev/null
+++ b/dom/imptests/html/webgl/test_texImage2D.html
@@ -0,0 +1,20 @@
+<!doctype html>
+<title>texImage2D</title>
+<link rel=author href=mailto:Ms2ger@gmail.com title=Ms2ger>
+<link rel=help href=https://www.khronos.org/registry/webgl/specs/latest/#5.14.8>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script src=common.js></script>
+
+<div id=log></div>
+<script>
+test(function() {
+  var gl = getGl();
+  assert_throws(new TypeError(), function() {
+    gl.texImage2D(0, 0, 0, 0, 0, window);
+  });
+  assert_throws(new TypeError(), function() {
+    gl.texImage2D(0, 0, 0, 0, 0, { get width() { throw 7 }, get height() { throw 7 }, data: new Uint8ClampedArray(10) });
+  });
+});
+</script>
diff --git a/dom/imptests/html/webgl/test_texSubImage2D.html b/dom/imptests/html/webgl/test_texSubImage2D.html
new file mode 100644
index 0000000000..294b30c760
--- /dev/null
+++ b/dom/imptests/html/webgl/test_texSubImage2D.html
@@ -0,0 +1,20 @@
+<!doctype html>
+<title>texSubImage2D</title>
+<link rel=author href=mailto:Ms2ger@gmail.com title=Ms2ger>
+<link rel=help href=https://www.khronos.org/registry/webgl/specs/latest/#5.14.8>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script src=common.js></script>
+
+<div id=log></div>
+<script>
+test(function() {
+  var gl = getGl();
+  assert_throws(new TypeError(), function() {
+    gl.texSubImage2D(0, 0, 0, 0, 0, 0, window);
+  });
+  assert_throws(new TypeError(), function() {
+    gl.texSubImage2D(0, 0, 0, 0, 0, 0, { get width() { throw 7 }, get height() { throw 7 }, data: new Uint8ClampedArray(10) });
+  });
+});
+</script>
diff --git a/dom/imptests/html/webgl/test_uniformMatrixNfv.html b/dom/imptests/html/webgl/test_uniformMatrixNfv.html
new file mode 100644
index 0000000000..f75cbcb997
--- /dev/null
+++ b/dom/imptests/html/webgl/test_uniformMatrixNfv.html
@@ -0,0 +1,33 @@
+<!doctype html>
+<title>uniformMatrix*fv</title>
+<link rel=author href=mailto:Ms2ger@gmail.com title=Ms2ger>
+<link rel=help href=https://www.khronos.org/registry/webgl/specs/latest/#WebGLRenderingContext>
+<link rel=help href=http://dev.w3.org/2006/webapi/WebIDL/#es-boolean>
+<link rel=help href=http://es5.github.com/#x9.2>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script src=common.js></script>
+
+<div id=log></div>
+<script id="vshader" type="x-shader/x-vertex">
+uniform mat2 m2;
+uniform mat3 m3;
+uniform mat4 m4;
+</script>
+<script>
+var floatArray = function(n) {
+  var a = [];
+  for (var i = 0; i < n; ++i) {
+    a.push(1);
+  }
+  return a;
+};
+[2, 3, 4].forEach(function(n) {
+  test(function() {
+    var gl = getGl();
+    var f = "uniformMatrix" + n + "fv";
+    var loc = gl.getUniformLocation(gl.createProgram(), "m" + n);
+    gl[f](loc, { valueOf: function() { throw "Error"; } }, floatArray(n));
+  }, "Should not throw for " + n);
+});
+</script>
diff --git a/dom/imptests/idlharness.js b/dom/imptests/idlharness.js
new file mode 100644
index 0000000000..8e41703e65
--- /dev/null
+++ b/dom/imptests/idlharness.js
@@ -0,0 +1,1706 @@
+/*
+Distributed under both the W3C Test Suite License [1] and the W3C
+3-clause BSD License [2]. To contribute to a W3C Test Suite, see the
+policies and contribution forms [3].
+
+[1] http://www.w3.org/Consortium/Legal/2008/04-testsuite-license
+[2] http://www.w3.org/Consortium/Legal/2008/03-bsd-license
+[3] http://www.w3.org/2004/10/27-testcases
+*/
+
+/* For user documentation see docs/idlharness.md */
+
+/**
+ * Notes for people who want to edit this file (not just use it as a library):
+ *
+ * Most of the interesting stuff happens in the derived classes of IdlObject,
+ * especially IdlInterface.  The entry point for all IdlObjects is .test(),
+ * which is called by IdlArray.test().  An IdlObject is conceptually just
+ * "thing we want to run tests on", and an IdlArray is an array of IdlObjects
+ * with some additional data thrown in.
+ *
+ * The object model is based on what WebIDLParser.js produces, which is in turn
+ * based on its pegjs grammar.  If you want to figure out what properties an
+ * object will have from WebIDLParser.js, the best way is to look at the
+ * grammar:
+ *
+ *   https://github.com/darobin/webidl.js/blob/master/lib/grammar.peg
+ *
+ * So for instance:
+ *
+ *   // interface definition
+ *   interface
+ *       =   extAttrs:extendedAttributeList? S? "interface" S name:identifier w herit:ifInheritance? w "{" w mem:ifMember* w "}" w ";" w
+ *           { return { type: "interface", name: name, inheritance: herit, members: mem, extAttrs: extAttrs }; }
+ *
+ * This means that an "interface" object will have a .type property equal to
+ * the string "interface", a .name property equal to the identifier that the
+ * parser found, an .inheritance property equal to either null or the result of
+ * the "ifInheritance" production found elsewhere in the grammar, and so on.
+ * After each grammatical production is a JavaScript function in curly braces
+ * that gets called with suitable arguments and returns some JavaScript value.
+ *
+ * (Note that the version of WebIDLParser.js we use might sometimes be
+ * out-of-date or forked.)
+ *
+ * The members and methods of the classes defined by this file are all at least
+ * briefly documented, hopefully.
+ */
+(function(){
+"use strict";
+/// Helpers ///
+function constValue (cnt) {
+    if (cnt.type === "null") return null;
+    if (cnt.type === "NaN") return NaN;
+    if (cnt.type === "Infinity") return cnt.negative ? -Infinity : Infinity;
+    return cnt.value;
+}
+
+function minOverloadLength(overloads) {
+    if (!overloads.length) {
+        return 0;
+    }
+
+    return overloads.map(function(attr) {
+        return attr.arguments ? attr.arguments.filter(function(arg) {
+            return !arg.optional && !arg.variadic;
+        }).length : 0;
+    })
+    .reduce(function(m, n) { return Math.min(m, n); });
+}
+
+/// IdlArray ///
+// Entry point
+self.IdlArray = function()
+//@{
+{
+    /**
+     * A map from strings to the corresponding named IdlObject, such as
+     * IdlInterface or IdlException.  These are the things that test() will run
+     * tests on.
+     */
+    this.members = {};
+
+    /**
+     * A map from strings to arrays of strings.  The keys are interface or
+     * exception names, and are expected to also exist as keys in this.members
+     * (otherwise they'll be ignored).  This is populated by add_objects() --
+     * see documentation at the start of the file.  The actual tests will be
+     * run by calling this.members[name].test_object(obj) for each obj in
+     * this.objects[name].  obj is a string that will be eval'd to produce a
+     * JavaScript value, which is supposed to be an object implementing the
+     * given IdlObject (interface, exception, etc.).
+     */
+    this.objects = {};
+
+    /**
+     * When adding multiple collections of IDLs one at a time, an earlier one
+     * might contain a partial interface or implements statement that depends
+     * on a later one.  Save these up and handle them right before we run
+     * tests.
+     *
+     * .partials is simply an array of objects from WebIDLParser.js'
+     * "partialinterface" production.  .implements maps strings to arrays of
+     * strings, such that
+     *
+     *   A implements B;
+     *   A implements C;
+     *   D implements E;
+     *
+     * results in { A: ["B", "C"], D: ["E"] }.
+     */
+    this.partials = [];
+    this["implements"] = {};
+};
+
+//@}
+IdlArray.prototype.add_idls = function(raw_idls)
+//@{
+{
+    /** Entry point.  See documentation at beginning of file. */
+    this.internal_add_idls(WebIDL2.parse(raw_idls));
+};
+
+//@}
+IdlArray.prototype.add_untested_idls = function(raw_idls)
+//@{
+{
+    /** Entry point.  See documentation at beginning of file. */
+    var parsed_idls = WebIDL2.parse(raw_idls);
+    for (var i = 0; i < parsed_idls.length; i++)
+    {
+        parsed_idls[i].untested = true;
+        if ("members" in parsed_idls[i])
+        {
+            for (var j = 0; j < parsed_idls[i].members.length; j++)
+            {
+                parsed_idls[i].members[j].untested = true;
+            }
+        }
+    }
+    this.internal_add_idls(parsed_idls);
+};
+
+//@}
+IdlArray.prototype.internal_add_idls = function(parsed_idls)
+//@{
+{
+    /**
+     * Internal helper called by add_idls() and add_untested_idls().
+     * parsed_idls is an array of objects that come from WebIDLParser.js's
+     * "definitions" production.  The add_untested_idls() entry point
+     * additionally sets an .untested property on each object (and its
+     * .members) so that they'll be skipped by test() -- they'll only be
+     * used for base interfaces of tested interfaces, return types, etc.
+     */
+    parsed_idls.forEach(function(parsed_idl)
+    {
+        if (parsed_idl.type == "interface" && parsed_idl.partial)
+        {
+            this.partials.push(parsed_idl);
+            return;
+        }
+
+        if (parsed_idl.type == "implements")
+        {
+            if (!(parsed_idl.target in this["implements"]))
+            {
+                this["implements"][parsed_idl.target] = [];
+            }
+            this["implements"][parsed_idl.target].push(parsed_idl["implements"]);
+            return;
+        }
+
+        parsed_idl.array = this;
+        if (parsed_idl.name in this.members)
+        {
+            throw "Duplicate identifier " + parsed_idl.name;
+        }
+        switch(parsed_idl.type)
+        {
+        case "interface":
+            this.members[parsed_idl.name] =
+                new IdlInterface(parsed_idl, /* is_callback = */ false);
+            break;
+
+        case "dictionary":
+            // Nothing to test, but we need the dictionary info around for type
+            // checks
+            this.members[parsed_idl.name] = new IdlDictionary(parsed_idl);
+            break;
+
+        case "typedef":
+            this.members[parsed_idl.name] = new IdlTypedef(parsed_idl);
+            break;
+
+        case "callback":
+            // TODO
+            console.log("callback not yet supported");
+            break;
+
+        case "enum":
+            this.members[parsed_idl.name] = new IdlEnum(parsed_idl);
+            break;
+
+        case "callback interface":
+            this.members[parsed_idl.name] =
+                new IdlInterface(parsed_idl, /* is_callback = */ true);
+            break;
+
+        default:
+            throw parsed_idl.name + ": " + parsed_idl.type + " not yet supported";
+        }
+    }.bind(this));
+};
+
+//@}
+IdlArray.prototype.add_objects = function(dict)
+//@{
+{
+    /** Entry point.  See documentation at beginning of file. */
+    for (var k in dict)
+    {
+        if (k in this.objects)
+        {
+            this.objects[k] = this.objects[k].concat(dict[k]);
+        }
+        else
+        {
+            this.objects[k] = dict[k];
+        }
+    }
+};
+
+//@}
+IdlArray.prototype.prevent_multiple_testing = function(name)
+//@{
+{
+    /** Entry point.  See documentation at beginning of file. */
+    this.members[name].prevent_multiple_testing = true;
+};
+
+//@}
+IdlArray.prototype.recursively_get_implements = function(interface_name)
+//@{
+{
+    /**
+     * Helper function for test().  Returns an array of things that implement
+     * interface_name, so if the IDL contains
+     *
+     *   A implements B;
+     *   B implements C;
+     *   B implements D;
+     *
+     * then recursively_get_implements("A") should return ["B", "C", "D"].
+     */
+    var ret = this["implements"][interface_name];
+    if (ret === undefined)
+    {
+        return [];
+    }
+    for (var i = 0; i < this["implements"][interface_name].length; i++)
+    {
+        ret = ret.concat(this.recursively_get_implements(ret[i]));
+        if (ret.indexOf(ret[i]) != ret.lastIndexOf(ret[i]))
+        {
+            throw "Circular implements statements involving " + ret[i];
+        }
+    }
+    return ret;
+};
+
+//@}
+IdlArray.prototype.test = function()
+//@{
+{
+    /** Entry point.  See documentation at beginning of file. */
+
+    // First merge in all the partial interfaces and implements statements we
+    // encountered.
+    this.partials.forEach(function(parsed_idl)
+    {
+        if (!(parsed_idl.name in this.members)
+        || !(this.members[parsed_idl.name] instanceof IdlInterface))
+        {
+            throw "Partial interface " + parsed_idl.name + " with no original interface";
+        }
+        if (parsed_idl.extAttrs)
+        {
+            parsed_idl.extAttrs.forEach(function(extAttr)
+            {
+                this.members[parsed_idl.name].extAttrs.push(extAttr);
+            }.bind(this));
+        }
+        parsed_idl.members.forEach(function(member)
+        {
+            this.members[parsed_idl.name].members.push(new IdlInterfaceMember(member));
+        }.bind(this));
+    }.bind(this));
+    this.partials = [];
+
+    for (var lhs in this["implements"])
+    {
+        this.recursively_get_implements(lhs).forEach(function(rhs)
+        {
+            var errStr = lhs + " implements " + rhs + ", but ";
+            if (!(lhs in this.members)) throw errStr + lhs + " is undefined.";
+            if (!(this.members[lhs] instanceof IdlInterface)) throw errStr + lhs + " is not an interface.";
+            if (!(rhs in this.members)) throw errStr + rhs + " is undefined.";
+            if (!(this.members[rhs] instanceof IdlInterface)) throw errStr + rhs + " is not an interface.";
+            this.members[rhs].members.forEach(function(member)
+            {
+                this.members[lhs].members.push(new IdlInterfaceMember(member));
+            }.bind(this));
+        }.bind(this));
+    }
+    this["implements"] = {};
+
+    // Now run test() on every member, and test_object() for every object.
+    for (var name in this.members)
+    {
+        this.members[name].test();
+        if (name in this.objects)
+        {
+            this.objects[name].forEach(function(str)
+            {
+                this.members[name].test_object(str);
+            }.bind(this));
+        }
+    }
+};
+
+//@}
+IdlArray.prototype.assert_type_is = function(value, type)
+//@{
+{
+    /**
+     * Helper function that tests that value is an instance of type according
+     * to the rules of WebIDL.  value is any JavaScript value, and type is an
+     * object produced by WebIDLParser.js' "type" production.  That production
+     * is fairly elaborate due to the complexity of WebIDL's types, so it's
+     * best to look at the grammar to figure out what properties it might have.
+     */
+    if (type.idlType == "any")
+    {
+        // No assertions to make
+        return;
+    }
+
+    if (type.nullable && value === null)
+    {
+        // This is fine
+        return;
+    }
+
+    if (type.array)
+    {
+        // TODO: not supported yet
+        return;
+    }
+
+    if (type.sequence)
+    {
+        assert_true(Array.isArray(value), "is not array");
+        if (!value.length)
+        {
+            // Nothing we can do.
+            return;
+        }
+        this.assert_type_is(value[0], type.idlType.idlType);
+        return;
+    }
+
+    type = type.idlType;
+
+    switch(type)
+    {
+        case "void":
+            assert_equals(value, undefined);
+            return;
+
+        case "boolean":
+            assert_equals(typeof value, "boolean");
+            return;
+
+        case "byte":
+            assert_equals(typeof value, "number");
+            assert_equals(value, Math.floor(value), "not an integer");
+            assert_true(-128 <= value && value <= 127, "byte " + value + " not in range [-128, 127]");
+            return;
+
+        case "octet":
+            assert_equals(typeof value, "number");
+            assert_equals(value, Math.floor(value), "not an integer");
+            assert_true(0 <= value && value <= 255, "octet " + value + " not in range [0, 255]");
+            return;
+
+        case "short":
+            assert_equals(typeof value, "number");
+            assert_equals(value, Math.floor(value), "not an integer");
+            assert_true(-32768 <= value && value <= 32767, "short " + value + " not in range [-32768, 32767]");
+            return;
+
+        case "unsigned short":
+            assert_equals(typeof value, "number");
+            assert_equals(value, Math.floor(value), "not an integer");
+            assert_true(0 <= value && value <= 65535, "unsigned short " + value + " not in range [0, 65535]");
+            return;
+
+        case "long":
+            assert_equals(typeof value, "number");
+            assert_equals(value, Math.floor(value), "not an integer");
+            assert_true(-2147483648 <= value && value <= 2147483647, "long " + value + " not in range [-2147483648, 2147483647]");
+            return;
+
+        case "unsigned long":
+            assert_equals(typeof value, "number");
+            assert_equals(value, Math.floor(value), "not an integer");
+            assert_true(0 <= value && value <= 4294967295, "unsigned long " + value + " not in range [0, 4294967295]");
+            return;
+
+        case "long long":
+            assert_equals(typeof value, "number");
+            return;
+
+        case "unsigned long long":
+        case "DOMTimeStamp":
+            assert_equals(typeof value, "number");
+            assert_true(0 <= value, "unsigned long long is negative");
+            return;
+
+        case "float":
+        case "double":
+        case "DOMHighResTimeStamp":
+        case "unrestricted float":
+        case "unrestricted double":
+            // TODO: distinguish these cases
+            assert_equals(typeof value, "number");
+            return;
+
+        case "DOMString":
+        case "ByteString":
+        case "USVString":
+            // TODO: https://github.com/w3c/testharness.js/issues/92
+            assert_equals(typeof value, "string");
+            return;
+
+        case "object":
+            assert_true(typeof value == "object" || typeof value == "function", "wrong type: not object or function");
+            return;
+    }
+
+    if (!(type in this.members))
+    {
+        throw "Unrecognized type " + type;
+    }
+
+    if (this.members[type] instanceof IdlInterface)
+    {
+        // We don't want to run the full
+        // IdlInterface.prototype.test_instance_of, because that could result
+        // in an infinite loop.  TODO: This means we don't have tests for
+        // NoInterfaceObject interfaces, and we also can't test objects that
+        // come from another self.
+        assert_true(typeof value == "object" || typeof value == "function", "wrong type: not object or function");
+        if (value instanceof Object
+        && !this.members[type].has_extended_attribute("NoInterfaceObject")
+        && type in self)
+        {
+            assert_true(value instanceof self[type], "not instanceof " + type);
+        }
+    }
+    else if (this.members[type] instanceof IdlEnum)
+    {
+        assert_equals(typeof value, "string");
+    }
+    else if (this.members[type] instanceof IdlDictionary)
+    {
+        // TODO: Test when we actually have something to test this on
+    }
+    else if (this.members[type] instanceof IdlTypedef)
+    {
+        // TODO: Test when we actually have something to test this on
+    }
+    else
+    {
+        throw "Type " + type + " isn't an interface or dictionary";
+    }
+};
+//@}
+
+/// IdlObject ///
+function IdlObject() {}
+IdlObject.prototype.test = function()
+//@{
+{
+    /**
+     * By default, this does nothing, so no actual tests are run for IdlObjects
+     * that don't define any (e.g., IdlDictionary at the time of this writing).
+     */
+};
+
+//@}
+IdlObject.prototype.has_extended_attribute = function(name)
+//@{
+{
+    /**
+     * This is only meaningful for things that support extended attributes,
+     * such as interfaces, exceptions, and members.
+     */
+    return this.extAttrs.some(function(o)
+    {
+        return o.name == name;
+    });
+};
+
+//@}
+
+/// IdlDictionary ///
+// Used for IdlArray.prototype.assert_type_is
+function IdlDictionary(obj)
+//@{
+{
+    /**
+     * obj is an object produced by the WebIDLParser.js "dictionary"
+     * production.
+     */
+
+    /** Self-explanatory. */
+    this.name = obj.name;
+
+    /** An array of objects produced by the "dictionaryMember" production. */
+    this.members = obj.members;
+
+    /**
+     * The name (as a string) of the dictionary type we inherit from, or null
+     * if there is none.
+     */
+    this.base = obj.inheritance;
+}
+
+//@}
+IdlDictionary.prototype = Object.create(IdlObject.prototype);
+
+/// IdlInterface ///
+function IdlInterface(obj, is_callback) {
+    /**
+     * obj is an object produced by the WebIDLParser.js "exception" or
+     * "interface" production, as appropriate.
+     */
+
+    /** Self-explanatory. */
+    this.name = obj.name;
+
+    /** A back-reference to our IdlArray. */
+    this.array = obj.array;
+
+    /**
+     * An indicator of whether we should run tests on the (exception) interface
+     * object and (exception) interface prototype object.  Tests on members are
+     * controlled by .untested on each member, not this.
+     */
+    this.untested = obj.untested;
+
+    /** An array of objects produced by the "ExtAttr" production. */
+    this.extAttrs = obj.extAttrs;
+
+    /** An array of IdlInterfaceMembers. */
+    this.members = obj.members.map(function(m){return new IdlInterfaceMember(m); });
+    if (this.has_extended_attribute("Unforgeable")) {
+        this.members
+            .filter(function(m) { return !m["static"] && (m.type == "attribute" || m.type == "operation"); })
+            .forEach(function(m) { return m.isUnforgeable = true; });
+    }
+
+    /**
+     * The name (as a string) of the type we inherit from, or null if there is
+     * none.
+     */
+    this.base = obj.inheritance;
+
+    this._is_callback = is_callback;
+}
+IdlInterface.prototype = Object.create(IdlObject.prototype);
+IdlInterface.prototype.is_callback = function()
+//@{
+{
+    return this._is_callback;
+};
+//@}
+
+IdlInterface.prototype.has_constants = function()
+//@{
+{
+    return this.members.some(function(member) {
+        return member.type === "const";
+    });
+};
+//@}
+
+IdlInterface.prototype.is_global = function()
+//@{
+{
+    return this.extAttrs.some(function(attribute) {
+        return attribute.name === "Global" ||
+               attribute.name === "PrimaryGlobal";
+    });
+};
+//@}
+
+IdlInterface.prototype.test = function()
+//@{
+{
+    if (this.has_extended_attribute("NoInterfaceObject"))
+    {
+        // No tests to do without an instance.  TODO: We should still be able
+        // to run tests on the prototype object, if we obtain one through some
+        // other means.
+        return;
+    }
+
+    if (!this.untested)
+    {
+        // First test things to do with the exception/interface object and
+        // exception/interface prototype object.
+        this.test_self();
+    }
+    // Then test things to do with its members (constants, fields, attributes,
+    // operations, . . .).  These are run even if .untested is true, because
+    // members might themselves be marked as .untested.  This might happen to
+    // interfaces if the interface itself is untested but a partial interface
+    // that extends it is tested -- then the interface itself and its initial
+    // members will be marked as untested, but the members added by the partial
+    // interface are still tested.
+    this.test_members();
+};
+//@}
+
+IdlInterface.prototype.test_self = function()
+//@{
+{
+    test(function()
+    {
+        // This function tests WebIDL as of 2015-01-13.
+        // TODO: Consider [Exposed].
+
+        // "For every interface that is exposed in a given ECMAScript global
+        // environment and:
+        // * is a callback interface that has constants declared on it, or
+        // * is a non-callback interface that is not declared with the
+        //   [NoInterfaceObject] extended attribute,
+        // a corresponding property MUST exist on the ECMAScript global object.
+        // The name of the property is the identifier of the interface, and its
+        // value is an object called the interface object.
+        // The property has the attributes { [[Writable]]: true,
+        // [[Enumerable]]: false, [[Configurable]]: true }."
+        if (this.is_callback() && !this.has_constants()) {
+            return;
+        }
+
+        // TODO: Should we test here that the property is actually writable
+        // etc., or trust getOwnPropertyDescriptor?
+        assert_own_property(self, this.name,
+                            "self does not have own property " + format_value(this.name));
+        var desc = Object.getOwnPropertyDescriptor(self, this.name);
+        assert_false("get" in desc, "self's property " + format_value(this.name) + " has getter");
+        assert_false("set" in desc, "self's property " + format_value(this.name) + " has setter");
+        assert_true(desc.writable, "self's property " + format_value(this.name) + " is not writable");
+        assert_false(desc.enumerable, "self's property " + format_value(this.name) + " is enumerable");
+        assert_true(desc.configurable, "self's property " + format_value(this.name) + " is not configurable");
+
+        if (this.is_callback()) {
+            // "The internal [[Prototype]] property of an interface object for
+            // a callback interface MUST be the Object.prototype object."
+            assert_equals(Object.getPrototypeOf(self[this.name]), Object.prototype,
+                          "prototype of self's property " + format_value(this.name) + " is not Object.prototype");
+
+            return;
+        }
+
+        // "The interface object for a given non-callback interface is a
+        // function object."
+        // "If an object is defined to be a function object, then it has
+        // characteristics as follows:"
+
+        // Its [[Prototype]] internal property is otherwise specified (see
+        // below).
+
+        // "* Its [[Get]] internal property is set as described in ECMA-262
+        //    section 9.1.8."
+        // Not much to test for this.
+
+        // "* Its [[Construct]] internal property is set as described in
+        //    ECMA-262 section 19.2.2.3."
+        // Tested below if no constructor is defined.  TODO: test constructors
+        // if defined.
+
+        // "* Its @@hasInstance property is set as described in ECMA-262
+        //    section 19.2.3.8, unless otherwise specified."
+        // TODO
+
+        // ES6 (rev 30) 19.1.3.6:
+        // "Else, if O has a [[Call]] internal method, then let builtinTag be
+        // "Function"."
+        assert_class_string(self[this.name], "Function", "class string of " + this.name);
+
+        // "The [[Prototype]] internal property of an interface object for a
+        // non-callback interface is determined as follows:"
+        var prototype = Object.getPrototypeOf(self[this.name]);
+        if (this.base) {
+            // "* If the interface inherits from some other interface, the
+            //    value of [[Prototype]] is the interface object for that other
+            //    interface."
+            var has_interface_object =
+                !this.array
+                     .members[this.base]
+                     .has_extended_attribute("NoInterfaceObject");
+            if (has_interface_object) {
+                assert_own_property(self, this.base,
+                                    'should inherit from ' + this.base +
+                                    ', but self has no such property');
+                assert_equals(prototype, self[this.base],
+                              'prototype of ' + this.name + ' is not ' +
+                              this.base);
+            }
+        } else {
+            // "If the interface doesn't inherit from any other interface, the
+            // value of [[Prototype]] is %FunctionPrototype% ([ECMA-262],
+            // section 6.1.7.4)."
+            assert_equals(prototype, Function.prototype,
+                          "prototype of self's property " + format_value(this.name) + " is not Function.prototype");
+        }
+
+        if (!this.has_extended_attribute("Constructor")) {
+            // "The internal [[Call]] method of the interface object behaves as
+            // follows . . .
+            //
+            // "If I was not declared with a [Constructor] extended attribute,
+            // then throw a TypeError."
+            assert_throws(new TypeError(), function() {
+                self[this.name]();
+            }.bind(this), "interface object didn't throw TypeError when called as a function");
+            assert_throws(new TypeError(), function() {
+                new self[this.name]();
+            }.bind(this), "interface object didn't throw TypeError when called as a constructor");
+        }
+    }.bind(this), this.name + " interface: existence and properties of interface object");
+
+    if (!this.is_callback()) {
+        test(function() {
+            // This function tests WebIDL as of 2014-10-25.
+            // https://heycam.github.io/webidl/#es-interface-call
+
+            assert_own_property(self, this.name,
+                                "self does not have own property " + format_value(this.name));
+
+            // "Interface objects for non-callback interfaces MUST have a
+            // property named “length” with attributes { [[Writable]]: false,
+            // [[Enumerable]]: false, [[Configurable]]: true } whose value is
+            // a Number."
+            assert_own_property(self[this.name], "length");
+            var desc = Object.getOwnPropertyDescriptor(self[this.name], "length");
+            assert_false("get" in desc, this.name + ".length has getter");
+            assert_false("set" in desc, this.name + ".length has setter");
+            assert_false(desc.writable, this.name + ".length is writable");
+            assert_false(desc.enumerable, this.name + ".length is enumerable");
+            assert_true(desc.configurable, this.name + ".length is not configurable");
+
+            var constructors = this.extAttrs
+                .filter(function(attr) { return attr.name == "Constructor"; });
+            var expected_length = minOverloadLength(constructors);
+            assert_equals(self[this.name].length, expected_length, "wrong value for " + this.name + ".length");
+        }.bind(this), this.name + " interface object length");
+    }
+
+    // TODO: Test named constructors if I find any interfaces that have them.
+
+    test(function()
+    {
+        // This function tests WebIDL as of 2015-01-21.
+        // https://heycam.github.io/webidl/#interface-object
+
+        if (this.is_callback() && !this.has_constants()) {
+            return;
+        }
+
+        assert_own_property(self, this.name,
+                            "self does not have own property " + format_value(this.name));
+
+        if (this.is_callback()) {
+            assert_false("prototype" in self[this.name],
+                         this.name + ' should not have a "prototype" property');
+            return;
+        }
+
+        // "An interface object for a non-callback interface must have a
+        // property named “prototype” with attributes { [[Writable]]: false,
+        // [[Enumerable]]: false, [[Configurable]]: false } whose value is an
+        // object called the interface prototype object. This object has
+        // properties that correspond to the regular attributes and regular
+        // operations defined on the interface, and is described in more detail
+        // in section 4.5.4 below."
+        assert_own_property(self[this.name], "prototype",
+                            'interface "' + this.name + '" does not have own property "prototype"');
+        var desc = Object.getOwnPropertyDescriptor(self[this.name], "prototype");
+        assert_false("get" in desc, this.name + ".prototype has getter");
+        assert_false("set" in desc, this.name + ".prototype has setter");
+        assert_false(desc.writable, this.name + ".prototype is writable");
+        assert_false(desc.enumerable, this.name + ".prototype is enumerable");
+        assert_false(desc.configurable, this.name + ".prototype is configurable");
+
+        // Next, test that the [[Prototype]] of the interface prototype object
+        // is correct. (This is made somewhat difficult by the existence of
+        // [NoInterfaceObject].)
+        // TODO: Aryeh thinks there's at least other place in this file where
+        //       we try to figure out if an interface prototype object is
+        //       correct. Consolidate that code.
+
+        // "The interface prototype object for a given interface A must have an
+        // internal [[Prototype]] property whose value is returned from the
+        // following steps:
+        // "If A is declared with the [Global] or [PrimaryGlobal] extended
+        // attribute, and A supports named properties, then return the named
+        // properties object for A, as defined in section 4.5.5 below.
+        // "Otherwise, if A is declared to inherit from another interface, then
+        // return the interface prototype object for the inherited interface.
+        // "Otherwise, if A is declared with the [ArrayClass] extended
+        // attribute, then return %ArrayPrototype% ([ECMA-262], section
+        // 6.1.7.4).
+        // "Otherwise, return %ObjectPrototype% ([ECMA-262], section 6.1.7.4).
+        // ([ECMA-262], section 15.2.4).
+        if (this.name === "Window") {
+            assert_class_string(Object.getPrototypeOf(self[this.name].prototype),
+                                'WindowProperties',
+                                'Class name for prototype of Window' +
+                                '.prototype is not "WindowProperties"');
+        } else {
+            var inherit_interface, inherit_interface_has_interface_object;
+            if (this.base) {
+                inherit_interface = this.base;
+                inherit_interface_has_interface_object =
+                    !this.array
+                         .members[inherit_interface]
+                         .has_extended_attribute("NoInterfaceObject");
+            } else if (this.has_extended_attribute('ArrayClass')) {
+                inherit_interface = 'Array';
+                inherit_interface_has_interface_object = true;
+            } else {
+                inherit_interface = 'Object';
+                inherit_interface_has_interface_object = true;
+            }
+            if (inherit_interface_has_interface_object) {
+                assert_own_property(self, inherit_interface,
+                                    'should inherit from ' + inherit_interface + ', but self has no such property');
+                assert_own_property(self[inherit_interface], 'prototype',
+                                    'should inherit from ' + inherit_interface + ', but that object has no "prototype" property');
+                assert_equals(Object.getPrototypeOf(self[this.name].prototype),
+                              self[inherit_interface].prototype,
+                              'prototype of ' + this.name + '.prototype is not ' + inherit_interface + '.prototype');
+            } else {
+                // We can't test that we get the correct object, because this is the
+                // only way to get our hands on it. We only test that its class
+                // string, at least, is correct.
+                assert_class_string(Object.getPrototypeOf(self[this.name].prototype),
+                                    inherit_interface + 'Prototype',
+                                    'Class name for prototype of ' + this.name +
+                                    '.prototype is not "' + inherit_interface + 'Prototype"');
+            }
+        }
+
+        // "The class string of an interface prototype object is the
+        // concatenation of the interface’s identifier and the string
+        // “Prototype”."
+        assert_class_string(self[this.name].prototype, this.name + "Prototype",
+                            "class string of " + this.name + ".prototype");
+        // String() should end up calling {}.toString if nothing defines a
+        // stringifier.
+        if (!this.has_stringifier()) {
+            assert_equals(String(self[this.name].prototype), "[object " + this.name + "Prototype]",
+                    "String(" + this.name + ".prototype)");
+        }
+    }.bind(this), this.name + " interface: existence and properties of interface prototype object");
+
+    test(function()
+    {
+        if (this.is_callback() && !this.has_constants()) {
+            return;
+        }
+
+        assert_own_property(self, this.name,
+                            "self does not have own property " + format_value(this.name));
+
+        if (this.is_callback()) {
+            assert_false("prototype" in self[this.name],
+                         this.name + ' should not have a "prototype" property');
+            return;
+        }
+
+        assert_own_property(self[this.name], "prototype",
+                            'interface "' + this.name + '" does not have own property "prototype"');
+
+        // "If the [NoInterfaceObject] extended attribute was not specified on
+        // the interface, then the interface prototype object must also have a
+        // property named “constructor” with attributes { [[Writable]]: true,
+        // [[Enumerable]]: false, [[Configurable]]: true } whose value is a
+        // reference to the interface object for the interface."
+        assert_own_property(self[this.name].prototype, "constructor",
+                            this.name + '.prototype does not have own property "constructor"');
+        var desc = Object.getOwnPropertyDescriptor(self[this.name].prototype, "constructor");
+        assert_false("get" in desc, this.name + ".prototype.constructor has getter");
+        assert_false("set" in desc, this.name + ".prototype.constructor has setter");
+        assert_true(desc.writable, this.name + ".prototype.constructor is not writable");
+        assert_false(desc.enumerable, this.name + ".prototype.constructor is enumerable");
+        assert_true(desc.configurable, this.name + ".prototype.constructor in not configurable");
+        assert_equals(self[this.name].prototype.constructor, self[this.name],
+                      this.name + '.prototype.constructor is not the same object as ' + this.name);
+    }.bind(this), this.name + ' interface: existence and properties of interface prototype object\'s "constructor" property');
+};
+
+//@}
+IdlInterface.prototype.test_member_const = function(member)
+//@{
+{
+    test(function()
+    {
+        if (this.is_callback() && !this.has_constants()) {
+            return;
+        }
+
+        assert_own_property(self, this.name,
+                            "self does not have own property " + format_value(this.name));
+
+        // "For each constant defined on an interface A, there must be
+        // a corresponding property on the interface object, if it
+        // exists."
+        assert_own_property(self[this.name], member.name);
+        // "The value of the property is that which is obtained by
+        // converting the constant’s IDL value to an ECMAScript
+        // value."
+        assert_equals(self[this.name][member.name], constValue(member.value),
+                      "property has wrong value");
+        // "The property has attributes { [[Writable]]: false,
+        // [[Enumerable]]: true, [[Configurable]]: false }."
+        var desc = Object.getOwnPropertyDescriptor(self[this.name], member.name);
+        assert_false("get" in desc, "property has getter");
+        assert_false("set" in desc, "property has setter");
+        assert_false(desc.writable, "property is writable");
+        assert_true(desc.enumerable, "property is not enumerable");
+        assert_false(desc.configurable, "property is configurable");
+    }.bind(this), this.name + " interface: constant " + member.name + " on interface object");
+    // "In addition, a property with the same characteristics must
+    // exist on the interface prototype object."
+    test(function()
+    {
+        if (this.is_callback() && !this.has_constants()) {
+            return;
+        }
+
+        assert_own_property(self, this.name,
+                            "self does not have own property " + format_value(this.name));
+
+        if (this.is_callback()) {
+            assert_false("prototype" in self[this.name],
+                         this.name + ' should not have a "prototype" property');
+            return;
+        }
+
+        assert_own_property(self[this.name], "prototype",
+                            'interface "' + this.name + '" does not have own property "prototype"');
+
+        assert_own_property(self[this.name].prototype, member.name);
+        assert_equals(self[this.name].prototype[member.name], constValue(member.value),
+                      "property has wrong value");
+        var desc = Object.getOwnPropertyDescriptor(self[this.name], member.name);
+        assert_false("get" in desc, "property has getter");
+        assert_false("set" in desc, "property has setter");
+        assert_false(desc.writable, "property is writable");
+        assert_true(desc.enumerable, "property is not enumerable");
+        assert_false(desc.configurable, "property is configurable");
+    }.bind(this), this.name + " interface: constant " + member.name + " on interface prototype object");
+};
+
+
+//@}
+IdlInterface.prototype.test_member_attribute = function(member)
+//@{
+{
+    test(function()
+    {
+        if (this.is_callback() && !this.has_constants()) {
+            return;
+        }
+
+        assert_own_property(self, this.name,
+                            "self does not have own property " + format_value(this.name));
+        assert_own_property(self[this.name], "prototype",
+                            'interface "' + this.name + '" does not have own property "prototype"');
+
+        if (member["static"]) {
+            assert_own_property(self[this.name], member.name,
+                "The interface object must have a property " +
+                format_value(member.name));
+        } else if (this.is_global()) {
+            assert_own_property(self, member.name,
+                "The global object must have a property " +
+                format_value(member.name));
+            assert_false(member.name in self[this.name].prototype,
+                "The prototype object must not have a property " +
+                format_value(member.name));
+
+            // Try/catch around the get here, since it can legitimately throw.
+            // If it does, we obviously can't check for equality with direct
+            // invocation of the getter.
+            var gotValue;
+            var propVal;
+            try {
+                propVal = self[member.name];
+                gotValue = true;
+            } catch (e) {
+                gotValue = false;
+            }
+            if (gotValue) {
+                var getter = Object.getOwnPropertyDescriptor(self, member.name).get;
+                assert_equals(typeof(getter), "function",
+                              format_value(member.name) + " must have a getter");
+                assert_equals(propVal, getter.call(undefined),
+                              "Gets on a global should not require an explicit this");
+            }
+            this.do_interface_attribute_asserts(self, member);
+        } else {
+            assert_true(member.name in self[this.name].prototype,
+                "The prototype object must have a property " +
+                format_value(member.name));
+
+            if (!member.has_extended_attribute("LenientThis")) {
+                assert_throws(new TypeError(), function() {
+                    self[this.name].prototype[member.name];
+                }.bind(this), "getting property on prototype object must throw TypeError");
+            } else {
+                assert_equals(self[this.name].prototype[member.name], undefined,
+                              "getting property on prototype object must return undefined");
+            }
+            this.do_interface_attribute_asserts(self[this.name].prototype, member);
+        }
+    }.bind(this), this.name + " interface: attribute " + member.name);
+};
+
+//@}
+IdlInterface.prototype.test_member_operation = function(member)
+//@{
+{
+    test(function()
+    {
+        if (this.is_callback() && !this.has_constants()) {
+            return;
+        }
+
+        assert_own_property(self, this.name,
+                            "self does not have own property " + format_value(this.name));
+
+        if (this.is_callback()) {
+            assert_false("prototype" in self[this.name],
+                         this.name + ' should not have a "prototype" property');
+            return;
+        }
+
+        assert_own_property(self[this.name], "prototype",
+                            'interface "' + this.name + '" does not have own property "prototype"');
+
+        // "For each unique identifier of an operation defined on the
+        // interface, there must be a corresponding property on the
+        // interface prototype object (if it is a regular operation) or
+        // the interface object (if it is a static operation), unless
+        // the effective overload set for that identifier and operation
+        // and with an argument count of 0 (for the ECMAScript language
+        // binding) has no entries."
+        //
+        var memberHolderObject;
+        if (member["static"]) {
+            assert_own_property(self[this.name], member.name,
+                    "interface object missing static operation");
+            memberHolderObject = self[this.name];
+        } else if (this.is_global()) {
+            assert_own_property(self, member.name,
+                    "global object missing non-static operation");
+            memberHolderObject = self;
+        } else {
+            assert_own_property(self[this.name].prototype, member.name,
+                    "interface prototype object missing non-static operation");
+            memberHolderObject = self[this.name].prototype;
+        }
+
+        this.do_member_operation_asserts(memberHolderObject, member);
+    }.bind(this), this.name + " interface: operation " + member.name +
+    "(" + member.arguments.map(function(m) { return m.idlType.idlType; }) +
+    ")");
+};
+
+//@}
+IdlInterface.prototype.do_member_operation_asserts = function(memberHolderObject, member)
+//@{
+{
+    var operationUnforgeable = member.isUnforgeable;
+    var desc = Object.getOwnPropertyDescriptor(memberHolderObject, member.name);
+    // "The property has attributes { [[Writable]]: B,
+    // [[Enumerable]]: true, [[Configurable]]: B }, where B is false if the
+    // operation is unforgeable on the interface, and true otherwise".
+    assert_false("get" in desc, "property has getter");
+    assert_false("set" in desc, "property has setter");
+    assert_equals(desc.writable, !operationUnforgeable,
+                  "property should be writable if and only if not unforgeable");
+    assert_true(desc.enumerable, "property is not enumerable");
+    assert_equals(desc.configurable, !operationUnforgeable,
+                  "property should be configurable if and only if not unforgeable");
+    // "The value of the property is a Function object whose
+    // behavior is as follows . . ."
+    assert_equals(typeof memberHolderObject[member.name], "function",
+                  "property must be a function");
+    // "The value of the Function object’s “length” property is
+    // a Number determined as follows:
+    // ". . .
+    // "Return the length of the shortest argument list of the
+    // entries in S."
+    assert_equals(memberHolderObject[member.name].length,
+        minOverloadLength(this.members.filter(function(m) {
+            return m.type == "operation" && m.name == member.name;
+        })),
+        "property has wrong .length");
+
+    // Make some suitable arguments
+    var args = member.arguments.map(function(arg) {
+        return create_suitable_object(arg.idlType);
+    });
+
+    // "Let O be a value determined as follows:
+    // ". . .
+    // "Otherwise, throw a TypeError."
+    // This should be hit if the operation is not static, there is
+    // no [ImplicitThis] attribute, and the this value is null.
+    //
+    // TODO: We currently ignore the [ImplicitThis] case.  Except we manually
+    // check for globals, since otherwise we'll invoke window.close().  And we
+    // have to skip this test for anything that on the proto chain of "self",
+    // since that does in fact have implicit-this behavior.
+    if (!member["static"]) {
+        if (!this.is_global() &&
+            memberHolderObject[member.name] != self[member.name])
+        {
+            assert_throws(new TypeError(), function() {
+                memberHolderObject[member.name].apply(null, args);
+            }, "calling operation with this = null didn't throw TypeError");
+        }
+
+        // ". . . If O is not null and is also not a platform object
+        // that implements interface I, throw a TypeError."
+        //
+        // TODO: Test a platform object that implements some other
+        // interface.  (Have to be sure to get inheritance right.)
+        assert_throws(new TypeError(), function() {
+            memberHolderObject[member.name].apply({}, args);
+        }, "calling operation with this = {} didn't throw TypeError");
+    }
+}
+
+//@}
+IdlInterface.prototype.test_member_stringifier = function(member)
+//@{
+{
+    test(function()
+    {
+        if (this.is_callback() && !this.has_constants()) {
+            return;
+        }
+
+        assert_own_property(self, this.name,
+                            "self does not have own property " + format_value(this.name));
+
+        if (this.is_callback()) {
+            assert_false("prototype" in self[this.name],
+                         this.name + ' should not have a "prototype" property');
+            return;
+        }
+
+        assert_own_property(self[this.name], "prototype",
+                            'interface "' + this.name + '" does not have own property "prototype"');
+
+        // ". . . the property exists on the interface prototype object."
+        var interfacePrototypeObject = self[this.name].prototype;
+        assert_own_property(self[this.name].prototype, "toString",
+                "interface prototype object missing non-static operation");
+
+        var stringifierUnforgeable = member.isUnforgeable;
+        var desc = Object.getOwnPropertyDescriptor(interfacePrototypeObject, "toString");
+        // "The property has attributes { [[Writable]]: B,
+        // [[Enumerable]]: true, [[Configurable]]: B }, where B is false if the
+        // stringifier is unforgeable on the interface, and true otherwise."
+        assert_false("get" in desc, "property has getter");
+        assert_false("set" in desc, "property has setter");
+        assert_equals(desc.writable, !stringifierUnforgeable,
+                      "property should be writable if and only if not unforgeable");
+        assert_true(desc.enumerable, "property is not enumerable");
+        assert_equals(desc.configurable, !stringifierUnforgeable,
+                      "property should be configurable if and only if not unforgeable");
+        // "The value of the property is a Function object, which behaves as
+        // follows . . ."
+        assert_equals(typeof interfacePrototypeObject.toString, "function",
+                      "property must be a function");
+        // "The value of the Function object’s “length” property is the Number
+        // value 0."
+        assert_equals(interfacePrototypeObject.toString.length, 0,
+            "property has wrong .length");
+
+        // "Let O be the result of calling ToObject on the this value."
+        assert_throws(new TypeError(), function() {
+            self[this.name].prototype.toString.apply(null, []);
+        }, "calling stringifier with this = null didn't throw TypeError");
+
+        // "If O is not an object that implements the interface on which the
+        // stringifier was declared, then throw a TypeError."
+        //
+        // TODO: Test a platform object that implements some other
+        // interface.  (Have to be sure to get inheritance right.)
+        assert_throws(new TypeError(), function() {
+            self[this.name].prototype.toString.apply({}, []);
+        }, "calling stringifier with this = {} didn't throw TypeError");
+    }.bind(this), this.name + " interface: stringifier");
+};
+
+//@}
+IdlInterface.prototype.test_members = function()
+//@{
+{
+    for (var i = 0; i < this.members.length; i++)
+    {
+        var member = this.members[i];
+        if (member.untested) {
+            continue;
+        }
+
+        switch (member.type) {
+        case "const":
+            this.test_member_const(member);
+            break;
+
+        case "attribute":
+            // For unforgeable attributes, we do the checks in
+            // test_interface_of instead.
+            if (!member.isUnforgeable)
+            {
+                this.test_member_attribute(member);
+            }
+            break;
+
+        case "operation":
+            // TODO: Need to correctly handle multiple operations with the same
+            // identifier.
+            // For unforgeable operations, we do the checks in
+            // test_interface_of instead.
+            if (member.name) {
+                if (!member.isUnforgeable)
+                {
+                    this.test_member_operation(member);
+                }
+            } else if (member.stringifier) {
+                this.test_member_stringifier(member);
+            }
+            break;
+
+        default:
+            // TODO: check more member types.
+            break;
+        }
+    }
+};
+
+//@}
+IdlInterface.prototype.test_object = function(desc)
+//@{
+{
+    var obj, exception = null;
+    try
+    {
+        obj = eval(desc);
+    }
+    catch(e)
+    {
+        exception = e;
+    }
+
+    // TODO: WebIDLParser doesn't currently support named legacycallers, so I'm
+    // not sure what those would look like in the AST
+    var expected_typeof = this.members.some(function(member)
+    {
+        return member.legacycaller
+            || ("idlType" in member && member.idlType.legacycaller)
+            || ("idlType" in member && typeof member.idlType == "object"
+            && "idlType" in member.idlType && member.idlType.idlType == "legacycaller");
+    }) ? "function" : "object";
+
+    this.test_primary_interface_of(desc, obj, exception, expected_typeof);
+    var current_interface = this;
+    while (current_interface)
+    {
+        if (!(current_interface.name in this.array.members))
+        {
+            throw "Interface " + current_interface.name + " not found (inherited by " + this.name + ")";
+        }
+        if (current_interface.prevent_multiple_testing && current_interface.already_tested)
+        {
+            return;
+        }
+        current_interface.test_interface_of(desc, obj, exception, expected_typeof);
+        current_interface = this.array.members[current_interface.base];
+    }
+};
+
+//@}
+IdlInterface.prototype.test_primary_interface_of = function(desc, obj, exception, expected_typeof)
+//@{
+{
+    // We can't easily test that its prototype is correct if there's no
+    // interface object, or the object is from a different global environment
+    // (not instanceof Object).  TODO: test in this case that its prototype at
+    // least looks correct, even if we can't test that it's actually correct.
+    if (!this.has_extended_attribute("NoInterfaceObject")
+    && (typeof obj != expected_typeof || obj instanceof Object))
+    {
+        test(function()
+        {
+            assert_equals(exception, null, "Unexpected exception when evaluating object");
+            assert_equals(typeof obj, expected_typeof, "wrong typeof object");
+            assert_own_property(self, this.name,
+                                "self does not have own property " + format_value(this.name));
+            assert_own_property(self[this.name], "prototype",
+                                'interface "' + this.name + '" does not have own property "prototype"');
+
+            // "The value of the internal [[Prototype]] property of the
+            // platform object is the interface prototype object of the primary
+            // interface from the platform object’s associated global
+            // environment."
+            assert_equals(Object.getPrototypeOf(obj),
+                          self[this.name].prototype,
+                          desc + "'s prototype is not " + this.name + ".prototype");
+        }.bind(this), this.name + " must be primary interface of " + desc);
+    }
+
+    // "The class string of a platform object that implements one or more
+    // interfaces must be the identifier of the primary interface of the
+    // platform object."
+    test(function()
+    {
+        assert_equals(exception, null, "Unexpected exception when evaluating object");
+        assert_equals(typeof obj, expected_typeof, "wrong typeof object");
+        assert_class_string(obj, this.name, "class string of " + desc);
+        if (!this.has_stringifier())
+        {
+            assert_equals(String(obj), "[object " + this.name + "]", "String(" + desc + ")");
+        }
+    }.bind(this), "Stringification of " + desc);
+};
+
+//@}
+IdlInterface.prototype.test_interface_of = function(desc, obj, exception, expected_typeof)
+//@{
+{
+    // TODO: Indexed and named properties, more checks on interface members
+    this.already_tested = true;
+
+    for (var i = 0; i < this.members.length; i++)
+    {
+        var member = this.members[i];
+        if (member.type == "attribute" && member.isUnforgeable)
+        {
+            test(function()
+            {
+                assert_equals(exception, null, "Unexpected exception when evaluating object");
+                assert_equals(typeof obj, expected_typeof, "wrong typeof object");
+                this.do_interface_attribute_asserts(obj, member);
+            }.bind(this), this.name + " interface: " + desc + ' must have own property "' + member.name + '"');
+        }
+        else if (member.type == "operation" &&
+                 member.name &&
+                 member.isUnforgeable)
+        {
+            test(function()
+            {
+                assert_equals(exception, null, "Unexpected exception when evaluating object");
+                assert_equals(typeof obj, expected_typeof, "wrong typeof object");
+                assert_own_property(obj, member.name,
+                                    "Doesn't have the unforgeable operation property");
+                this.do_member_operation_asserts(obj, member);
+            }.bind(this), this.name + " interface: " + desc + ' must have own property "' + member.name + '"');
+        }
+        else if ((member.type == "const"
+        || member.type == "attribute"
+        || member.type == "operation")
+        && member.name)
+        {
+            test(function()
+            {
+                assert_equals(exception, null, "Unexpected exception when evaluating object");
+                assert_equals(typeof obj, expected_typeof, "wrong typeof object");
+                if (!member["static"]) {
+                    if (!this.is_global()) {
+                        assert_inherits(obj, member.name);
+                    } else {
+                        assert_own_property(obj, member.name);
+                    }
+
+                    if (member.type == "const")
+                    {
+                        assert_equals(obj[member.name], constValue(member.value));
+                    }
+                    if (member.type == "attribute")
+                    {
+                        // Attributes are accessor properties, so they might
+                        // legitimately throw an exception rather than returning
+                        // anything.
+                        var property, thrown = false;
+                        try
+                        {
+                            property = obj[member.name];
+                        }
+                        catch (e)
+                        {
+                            thrown = true;
+                        }
+                        if (!thrown)
+                        {
+                            this.array.assert_type_is(property, member.idlType);
+                        }
+                    }
+                    if (member.type == "operation")
+                    {
+                        assert_equals(typeof obj[member.name], "function");
+                    }
+                }
+            }.bind(this), this.name + " interface: " + desc + ' must inherit property "' + member.name + '" with the proper type (' + i + ')');
+        }
+        // TODO: This is wrong if there are multiple operations with the same
+        // identifier.
+        // TODO: Test passing arguments of the wrong type.
+        if (member.type == "operation" && member.name && member.arguments.length)
+        {
+            test(function()
+            {
+                assert_equals(exception, null, "Unexpected exception when evaluating object");
+                assert_equals(typeof obj, expected_typeof, "wrong typeof object");
+                if (!member["static"]) {
+                    if (!this.is_global() && !member.isUnforgeable) {
+                        assert_inherits(obj, member.name);
+                    } else {
+                        assert_own_property(obj, member.name);
+                    }
+                }
+                else
+                {
+                    assert_false(member.name in obj);
+                }
+
+                var minLength = minOverloadLength(this.members.filter(function(m) {
+                    return m.type == "operation" && m.name == member.name;
+                }));
+                var args = [];
+                for (var i = 0; i < minLength; i++) {
+                    assert_throws(new TypeError(), function()
+                    {
+                        obj[member.name].apply(obj, args);
+                    }.bind(this), "Called with " + i + " arguments");
+
+                    args.push(create_suitable_object(member.arguments[i].idlType));
+                }
+            }.bind(this), this.name + " interface: calling " + member.name +
+            "(" + member.arguments.map(function(m) { return m.idlType.idlType; }) +
+            ") on " + desc + " with too few arguments must throw TypeError");
+        }
+    }
+};
+
+//@}
+IdlInterface.prototype.has_stringifier = function()
+//@{
+{
+    if (this.members.some(function(member) { return member.stringifier; })) {
+        return true;
+    }
+    if (this.base &&
+        this.array.members[this.base].has_stringifier()) {
+        return true;
+    }
+    return false;
+};
+
+//@}
+IdlInterface.prototype.do_interface_attribute_asserts = function(obj, member)
+//@{
+{
+    // This function tests WebIDL as of 2015-01-27.
+    // TODO: Consider [Exposed].
+
+    // This is called by test_member_attribute() with the prototype as obj if
+    // it is not a global, and the global otherwise, and by test_interface_of()
+    // with the object as obj.
+
+    // "For each exposed attribute of the interface, whether it was declared on
+    // the interface itself or one of its consequential interfaces, there MUST
+    // exist a corresponding property. The characteristics of this property are
+    // as follows:"
+
+    // "The name of the property is the identifier of the attribute."
+    assert_own_property(obj, member.name);
+
+    // "The property has attributes { [[Get]]: G, [[Set]]: S, [[Enumerable]]:
+    // true, [[Configurable]]: configurable }, where:
+    // "configurable is false if the attribute was declared with the
+    // [Unforgeable] extended attribute and true otherwise;
+    // "G is the attribute getter, defined below; and
+    // "S is the attribute setter, also defined below."
+    var desc = Object.getOwnPropertyDescriptor(obj, member.name);
+    assert_false("value" in desc, 'property descriptor has value but is supposed to be accessor');
+    assert_false("writable" in desc, 'property descriptor has "writable" field but is supposed to be accessor');
+    assert_true(desc.enumerable, "property is not enumerable");
+    if (member.isUnforgeable)
+    {
+        assert_false(desc.configurable, "[Unforgeable] property must not be configurable");
+    }
+    else
+    {
+        assert_true(desc.configurable, "property must be configurable");
+    }
+
+
+    // "The attribute getter is a Function object whose behavior when invoked
+    // is as follows:"
+    assert_equals(typeof desc.get, "function", "getter must be Function");
+
+    // "If the attribute is a regular attribute, then:"
+    if (!member["static"]) {
+        // "If O is not a platform object that implements I, then:
+        // "If the attribute was specified with the [LenientThis] extended
+        // attribute, then return undefined.
+        // "Otherwise, throw a TypeError."
+        if (!member.has_extended_attribute("LenientThis")) {
+            assert_throws(new TypeError(), function() {
+                desc.get.call({});
+            }.bind(this), "calling getter on wrong object type must throw TypeError");
+        } else {
+            assert_equals(desc.get.call({}), undefined,
+                          "calling getter on wrong object type must return undefined");
+        }
+    }
+
+    // "The value of the Function object’s “length” property is the Number
+    // value 0."
+    assert_equals(desc.get.length, 0, "getter length must be 0");
+
+
+    // TODO: Test calling setter on the interface prototype (should throw
+    // TypeError in most cases).
+    if (member.readonly
+    && !member.has_extended_attribute("PutForwards")
+    && !member.has_extended_attribute("Replaceable"))
+    {
+        // "The attribute setter is undefined if the attribute is declared
+        // readonly and has neither a [PutForwards] nor a [Replaceable]
+        // extended attribute declared on it."
+        assert_equals(desc.set, undefined, "setter must be undefined for readonly attributes");
+    }
+    else
+    {
+        // "Otherwise, it is a Function object whose behavior when
+        // invoked is as follows:"
+        assert_equals(typeof desc.set, "function", "setter must be function for PutForwards, Replaceable, or non-readonly attributes");
+
+        // "If the attribute is a regular attribute, then:"
+        if (!member["static"]) {
+            // "If /validThis/ is false and the attribute was not specified
+            // with the [LenientThis] extended attribute, then throw a
+            // TypeError."
+            // "If the attribute is declared with a [Replaceable] extended
+            // attribute, then: ..."
+            // "If validThis is false, then return."
+            if (!member.has_extended_attribute("LenientThis")) {
+                assert_throws(new TypeError(), function() {
+                    desc.set.call({});
+                }.bind(this), "calling setter on wrong object type must throw TypeError");
+            } else {
+                assert_equals(desc.set.call({}), undefined,
+                              "calling setter on wrong object type must return undefined");
+            }
+        }
+
+        // "The value of the Function object’s “length” property is the Number
+        // value 1."
+        assert_equals(desc.set.length, 1, "setter length must be 1");
+    }
+}
+//@}
+
+/// IdlInterfaceMember ///
+function IdlInterfaceMember(obj)
+//@{
+{
+    /**
+     * obj is an object produced by the WebIDLParser.js "ifMember" production.
+     * We just forward all properties to this object without modification,
+     * except for special extAttrs handling.
+     */
+    for (var k in obj)
+    {
+        this[k] = obj[k];
+    }
+    if (!("extAttrs" in this))
+    {
+        this.extAttrs = [];
+    }
+
+    this.isUnforgeable = this.has_extended_attribute("Unforgeable");
+}
+
+//@}
+IdlInterfaceMember.prototype = Object.create(IdlObject.prototype);
+
+/// Internal helper functions ///
+function create_suitable_object(type)
+//@{
+{
+    /**
+     * type is an object produced by the WebIDLParser.js "type" production.  We
+     * return a JavaScript value that matches the type, if we can figure out
+     * how.
+     */
+    if (type.nullable)
+    {
+        return null;
+    }
+    switch (type.idlType)
+    {
+        case "any":
+        case "boolean":
+            return true;
+
+        case "byte": case "octet": case "short": case "unsigned short":
+        case "long": case "unsigned long": case "long long":
+        case "unsigned long long": case "float": case "double":
+        case "unrestricted float": case "unrestricted double":
+            return 7;
+
+        case "DOMString":
+        case "ByteString":
+        case "USVString":
+            return "foo";
+
+        case "object":
+            return {a: "b"};
+
+        case "Node":
+            return document.createTextNode("abc");
+    }
+    return null;
+}
+//@}
+
+/// IdlEnum ///
+// Used for IdlArray.prototype.assert_type_is
+function IdlEnum(obj)
+//@{
+{
+    /**
+     * obj is an object produced by the WebIDLParser.js "dictionary"
+     * production.
+     */
+
+    /** Self-explanatory. */
+    this.name = obj.name;
+
+    /** An array of values produced by the "enum" production. */
+    this.values = obj.values;
+
+}
+//@}
+
+IdlEnum.prototype = Object.create(IdlObject.prototype);
+
+/// IdlTypedef ///
+// Used for IdlArray.prototype.assert_type_is
+function IdlTypedef(obj)
+//@{
+{
+    /**
+     * obj is an object produced by the WebIDLParser.js "typedef"
+     * production.
+     */
+
+    /** Self-explanatory. */
+    this.name = obj.name;
+
+    /** An array of values produced by the "typedef" production. */
+    this.values = obj.values;
+
+}
+//@}
+
+IdlTypedef.prototype = Object.create(IdlObject.prototype);
+
+}());
+// vim: set expandtab shiftwidth=4 tabstop=4 foldmarker=@{,@} foldmethod=marker:
diff --git a/dom/imptests/importTestsuite.py b/dom/imptests/importTestsuite.py
new file mode 100644
index 0000000000..c66b28fb32
--- /dev/null
+++ b/dom/imptests/importTestsuite.py
@@ -0,0 +1,189 @@
+#!/usr/bin/env python
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this file,
+# You can obtain one at http://mozilla.org/MPL/2.0/.
+
+"""
+Imports a test suite from a remote repository. Takes one argument, a file in
+the format described in README.
+Note: removes both source and destination directory before starting. Do not
+      use with outstanding changes in either directory.
+"""
+
+from __future__ import print_function, unicode_literals
+
+import os
+import shutil
+import subprocess
+import sys
+
+import parseManifest
+import writeBuildFiles
+
+def readManifests(iden, dirs):
+    def parseManifestFile(iden, path):
+        pathstr = "hg-%s/%s/MANIFEST" % (iden, path)
+        subdirs, mochitests, reftests, _, supportfiles = parseManifest.parseManifestFile(pathstr)
+        return subdirs, mochitests, reftests, supportfiles
+
+    data = []
+    for path in dirs:
+        subdirs, mochitests, reftests, supportfiles = parseManifestFile(iden, path)
+        data.append({
+          "path": path,
+          "mochitests": mochitests,
+          "reftests": reftests,
+          "supportfiles": supportfiles,
+        })
+        data.extend(readManifests(iden, ["%s/%s" % (path, d) for d in subdirs]))
+    return data
+
+
+def getData(confFile):
+    """This function parses a file of the form
+    (hg or git)|URL of remote repository|identifier for the local directory
+    First directory of tests
+    ...
+    Last directory of tests"""
+    vcs = ""
+    url = ""
+    iden = ""
+    directories = []
+    try:
+        with open(confFile, 'r') as fp:
+            first = True
+            for line in fp:
+                if first:
+                    vcs, url, iden = line.strip().split("|")
+                    first = False
+                else:
+                    directories.append(line.strip())
+    finally:
+        return vcs, url, iden, directories
+
+
+def makePathInternal(a, b):
+    if not b:
+        # Empty directory, i.e., the repository root.
+        return a
+    return "%s/%s" % (a, b)
+
+
+def makeSourcePath(a, b):
+    """Make a path in the source (upstream) directory."""
+    return makePathInternal("hg-%s" % a, b)
+
+
+def makeDestPath(a, b):
+    """Make a path in the destination (mozilla-central) directory, shortening as
+    appropriate."""
+    def shorten(path):
+        path = path.replace('dom-tree-accessors', 'dta')
+        path = path.replace('document.getElementsByName', 'doc.gEBN')
+        path = path.replace('requirements-for-implementations', 'implreq')
+        path = path.replace('other-elements-attributes-and-apis', 'oeaaa')
+        return path
+
+    return shorten(makePathInternal(a, b))
+
+
+def extractReftestFiles(reftests):
+    """Returns the set of files referenced in the reftests argument"""
+    files = set()
+    for line in reftests:
+        files.update([line[1], line[2]])
+    return files
+
+
+def copy(dest, directories):
+    """Copy mochitests and support files from the external HG directory to their
+    place in mozilla-central.
+    """
+    print("Copying tests...")
+    for d in directories:
+        sourcedir = makeSourcePath(dest, d["path"])
+        destdir = makeDestPath(dest, d["path"])
+        os.makedirs(destdir)
+
+        reftestfiles = extractReftestFiles(d["reftests"])
+
+        for mochitest in d["mochitests"]:
+            shutil.copy("%s/%s" % (sourcedir, mochitest), "%s/test_%s" % (destdir, mochitest))
+        for reftest in sorted(reftestfiles):
+            shutil.copy("%s/%s" % (sourcedir, reftest), "%s/%s" % (destdir, reftest))
+        for support in d["supportfiles"]:
+            shutil.copy("%s/%s" % (sourcedir, support), "%s/%s" % (destdir, support))
+
+def printBuildFiles(dest, directories):
+    """Create a mochitest.ini that all the contains tests we import.
+    """
+    print("Creating manifest...")
+    all_mochitests = set()
+    all_support = set()
+
+    for d in directories:
+        path = makeDestPath(dest, d["path"])
+
+        all_mochitests |= set('%s/test_%s' % (d['path'], mochitest)
+            for mochitest in d['mochitests'])
+        all_support |= set('%s/%s' % (d['path'], p) for p in d['supportfiles'])
+
+        if d["reftests"]:
+            with open(path + "/reftest.list", "w") as fh:
+                result = writeBuildFiles.substReftestList("importTestsuite.py",
+                    d["reftests"])
+                fh.write(result)
+
+    manifest_path = dest + '/mochitest.ini'
+    with open(manifest_path, 'w') as fh:
+        result = writeBuildFiles.substManifest('importTestsuite.py',
+            all_mochitests, all_support)
+        fh.write(result)
+    subprocess.check_call(["hg", "add", manifest_path])
+
+def hgadd(dest, directories):
+    """Inform hg of the files in |directories|."""
+    print("hg addremoving...")
+    for d in directories:
+        subprocess.check_call(["hg", "addremove", makeDestPath(dest, d)])
+
+def removeAndCloneRepo(vcs, url, dest):
+    """Replaces the repo at dest by a fresh clone from url using vcs"""
+    assert vcs in ('hg', 'git')
+
+    print("Removing %s..." % dest)
+    subprocess.check_call(["rm", "-rf", dest])
+
+    print("Cloning %s to %s with %s..." % (url, dest, vcs))
+    subprocess.check_call([vcs, "clone", url, dest])
+
+def importRepo(confFile):
+    try:
+        vcs, url, iden, directories = getData(confFile)
+        dest = iden
+        hgdest = "hg-%s" % iden
+
+        print("Removing %s..." % dest)
+        subprocess.check_call(["rm", "-rf", dest])
+
+        removeAndCloneRepo(vcs, url, hgdest)
+
+        data = readManifests(iden, directories)
+        print("Going to import %s..." % [d["path"] for d in data])
+
+        copy(dest, data)
+        printBuildFiles(dest, data)
+        hgadd(dest, directories)
+        print("Removing %s again..." % hgdest)
+        subprocess.check_call(["rm", "-rf", hgdest])
+    except subprocess.CalledProcessError as e:
+        print(e.returncode)
+    finally:
+        print("Done")
+
+if __name__ == "__main__":
+    if len(sys.argv) != 2:
+        print("Need one argument.")
+    else:
+        importRepo(sys.argv[1])
+
diff --git a/dom/imptests/moz.build b/dom/imptests/moz.build
new file mode 100644
index 0000000000..595e58ce78
--- /dev/null
+++ b/dom/imptests/moz.build
@@ -0,0 +1,23 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+MOCHITEST_MANIFESTS += [
+    'html/mochitest.ini',
+    'webapps/mochitest.ini',
+]
+
+MOCHITEST_MANIFESTS += [
+    'failures/html/typedarrays/mochitest.ini',
+    'failures/webapps/WebStorage/tests/submissions/Infraware/mochitest.ini',
+]
+
+TEST_HARNESS_FILES.testing.mochitest.resources += [
+    'idlharness.js',
+    'testharness.css',
+    'testharness.js',
+    'testharnessreport.js',
+    'WebIDLParser.js',
+]
diff --git a/dom/imptests/parseFailures.py b/dom/imptests/parseFailures.py
new file mode 100644
index 0000000000..6824b836c6
--- /dev/null
+++ b/dom/imptests/parseFailures.py
@@ -0,0 +1,79 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+from __future__ import print_function, unicode_literals
+
+import collections
+import json
+import os
+import sys
+
+import writeBuildFiles
+
+def extractLines(fp):
+    lines = []
+    watch = False
+    for line in fp:
+        line = line.decode('utf-8')
+        if line == '@@@ @@@ Failures\n':
+            watch = True
+        elif watch:
+            watch = False
+            idx = line.index('@@@')
+            lines.append((line[:idx], line[idx + 3:]))
+    return lines
+
+def ensuredir(path):
+    dir = path[:path.rfind('/')]
+    if not os.path.exists(dir):
+        os.makedirs(dir)
+
+def dumpFailures(lines):
+    files = []
+    for url, objstr in lines:
+        if objstr == '{}\n':
+            continue
+
+        # Avoid overly large diffs.
+        if 'editing/' in url:
+            sep = ':'
+        else:
+            sep = ': '
+
+        jsonpath = 'failures/' + url + '.json'
+        files.append(jsonpath)
+        ensuredir(jsonpath)
+        obj = json.loads(objstr, object_pairs_hook=collections.OrderedDict)
+        formattedobjstr = json.dumps(obj, indent=2, separators=(',', sep)) + '\n'
+        formattedobj = formattedobjstr.encode('utf-8')
+        fp = open(jsonpath, 'wb')
+        fp.write(formattedobj)
+        fp.close()
+    return files
+
+def writeFiles(files):
+    pathmap = {}
+    for path in files:
+        dirp, leaf = path.rsplit('/', 1)
+        pathmap.setdefault(dirp, []).append(leaf)
+
+    for k, v in pathmap.items():
+        with open(k + '/mochitest.ini', 'w') as fh:
+            result = writeBuildFiles.substManifest('parseFailures.py', v, [])
+            fh.write(result)
+
+
+def main(logPath):
+    fp = open(logPath, 'rb')
+    lines = extractLines(fp)
+    fp.close()
+
+    files = dumpFailures(lines)
+    writeFiles(files)
+
+if __name__ == '__main__':
+    if len(sys.argv) < 2:
+        print("Please pass the path to the logfile from which failures should be extracted.")
+    main(sys.argv[1])
+
diff --git a/dom/imptests/parseManifest.py b/dom/imptests/parseManifest.py
new file mode 100644
index 0000000000..94412122d6
--- /dev/null
+++ b/dom/imptests/parseManifest.py
@@ -0,0 +1,69 @@
+# Copyright (C) 2011-2013 Ms2ger
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+
+
+def parseManifest(fd):
+    def parseReftestLine(chunks):
+        assert len(chunks) % 2 == 0
+        reftests = []
+        for i in range(2, len(chunks), 2):
+            if not chunks[i] in ["==", "!="]:
+                raise Exception("Misformatted reftest line " + line)
+            reftests.append([chunks[i], chunks[1], chunks[i + 1]])
+        return reftests
+
+    dirs = []
+    autotests = []
+    reftests = []
+    othertests = []
+    supportfiles = []
+    for fullline in fd:
+        line = fullline.strip()
+        if not line:
+            continue
+
+        chunks = line.split(" ")
+
+        if chunks[0] == "MANIFEST":
+            raise Exception("MANIFEST listed on line " + line)
+
+        if chunks[0] == "dir":
+            dirs.append(chunks[1])
+        elif chunks[0] == "support" and chunks[1] == "dir":
+            dirs.append(chunks[1])
+        elif chunks[0] == "ref":
+            if len(chunks) % 2:
+                raise Exception("Missing chunk in line " + line)
+            reftests.extend(parseReftestLine(chunks))
+        elif chunks[0] == "support":
+            supportfiles.append(chunks[1])
+        elif chunks[0] in ["manual", "parser", "http"]:
+            othertests.append(chunks[1])
+        else:
+            # automated
+            autotests.append(chunks[0])
+    return dirs, autotests, reftests, othertests, supportfiles
+
+
+def parseManifestFile(path):
+    fp = open(path)
+    dirs, autotests, reftests, othertests, supportfiles = parseManifest(fp)
+    fp.close()
+    return dirs, autotests, reftests, othertests, supportfiles
diff --git a/dom/imptests/testharness.css b/dom/imptests/testharness.css
new file mode 100644
index 0000000000..e2ed5a043f
--- /dev/null
+++ b/dom/imptests/testharness.css
@@ -0,0 +1,102 @@
+html {
+    font-family:DejaVu Sans, Bitstream Vera Sans, Arial, Sans;
+}
+
+#log .warning,
+#log .warning a {
+  color: black;
+  background: yellow;
+}
+
+#log .error,
+#log .error a {
+  color: white;
+  background: red;
+}
+
+section#summary {
+    margin-bottom:1em;
+}
+
+table#results {
+    border-collapse:collapse;
+    table-layout:fixed;
+    width:100%;
+}
+
+table#results th:first-child,
+table#results td:first-child {
+    width:4em;
+}
+
+table#results th:last-child,
+table#results td:last-child {
+    width:50%;
+}
+
+table#results.assertions th:last-child,
+table#results.assertions td:last-child {
+    width:35%;
+}
+
+table#results th {
+    padding:0;
+    padding-bottom:0.5em;
+    border-bottom:medium solid black;
+}
+
+table#results td {
+    padding:1em;
+    padding-bottom:0.5em;
+    border-bottom:thin solid black;
+}
+
+tr.pass > td:first-child {
+    color:green;
+}
+
+tr.fail > td:first-child {
+    color:red;
+}
+
+tr.timeout > td:first-child {
+    color:red;
+}
+
+tr.notrun > td:first-child {
+    color:blue;
+}
+
+.pass > td:first-child, .fail > td:first-child, .timeout > td:first-child, .notrun > td:first-child {
+    font-variant:small-caps;
+}
+
+table#results span {
+    display:block;
+}
+
+table#results span.expected {
+    font-family:DejaVu Sans Mono, Bitstream Vera Sans Mono, Monospace;
+    white-space:pre;
+}
+
+table#results span.actual {
+    font-family:DejaVu Sans Mono, Bitstream Vera Sans Mono, Monospace;
+    white-space:pre;
+}
+
+span.ok {
+    color:green;
+}
+
+tr.error {
+    color:red;
+}
+
+span.timeout {
+    color:red;
+}
+
+span.ok, span.timeout, span.error {
+    font-variant:small-caps;
+}
\ No newline at end of file
diff --git a/dom/imptests/testharness.js b/dom/imptests/testharness.js
new file mode 100644
index 0000000000..f4c66aae62
--- /dev/null
+++ b/dom/imptests/testharness.js
@@ -0,0 +1,2657 @@
+/*global self*/
+/*jshint latedef: nofunc*/
+/*
+Distributed under both the W3C Test Suite License [1] and the W3C
+3-clause BSD License [2]. To contribute to a W3C Test Suite, see the
+policies and contribution forms [3].
+
+[1] http://www.w3.org/Consortium/Legal/2008/04-testsuite-license
+[2] http://www.w3.org/Consortium/Legal/2008/03-bsd-license
+[3] http://www.w3.org/2004/10/27-testcases
+*/
+
+/* Documentation is in docs/api.md */
+
+(function ()
+{
+    var debug = false;
+    // default timeout is 10 seconds, test can override if needed
+    var settings = {
+        output:true,
+        harness_timeout:{
+            "normal":10000,
+            "long":60000
+        },
+        test_timeout:null,
+        message_events: ["start", "test_state", "result", "completion"]
+    };
+
+    var xhtml_ns = "http://www.w3.org/1999/xhtml";
+
+    /*
+     * TestEnvironment is an abstraction for the environment in which the test
+     * harness is used. Each implementation of a test environment has to provide
+     * the following interface:
+     *
+     * interface TestEnvironment {
+     *   // Invoked after the global 'tests' object has been created and it's
+     *   // safe to call add_*_callback() to register event handlers.
+     *   void on_tests_ready();
+     *
+     *   // Invoked after setup() has been called to notify the test environment
+     *   // of changes to the test harness properties.
+     *   void on_new_harness_properties(object properties);
+     *
+     *   // Should return a new unique default test name.
+     *   DOMString next_default_test_name();
+     *
+     *   // Should return the test harness timeout duration in milliseconds.
+     *   float test_timeout();
+     *
+     *   // Should return the global scope object.
+     *   object global_scope();
+     * };
+     */
+
+    /*
+     * A test environment with a DOM. The global object is 'window'. By default
+     * test results are displayed in a table. Any parent windows receive
+     * callbacks or messages via postMessage() when test events occur. See
+     * apisample11.html and apisample12.html.
+     */
+    function WindowTestEnvironment() {
+        this.name_counter = 0;
+        this.window_cache = null;
+        this.output_handler = null;
+        this.all_loaded = false;
+        var this_obj = this;
+        this.message_events = [];
+
+        this.message_functions = {
+            start: [add_start_callback, remove_start_callback,
+                    function (properties) {
+                        this_obj._dispatch("start_callback", [properties],
+                                           {type: "start", properties: properties});
+                    }],
+
+            test_state: [add_test_state_callback, remove_test_state_callback,
+                         function(test) {
+                             this_obj._dispatch("test_state_callback", [test],
+                                                {type: "test_state",
+                                                 test: test.structured_clone()});
+                         }],
+            result: [add_result_callback, remove_result_callback,
+                     function (test) {
+                         this_obj.output_handler.show_status();
+                         this_obj._dispatch("result_callback", [test],
+                                            {type: "result",
+                                             test: test.structured_clone()});
+                     }],
+            completion: [add_completion_callback, remove_completion_callback,
+                         function (tests, harness_status) {
+                             var cloned_tests = map(tests, function(test) {
+                                 return test.structured_clone();
+                             });
+                             this_obj._dispatch("completion_callback", [tests, harness_status],
+                                                {type: "complete",
+                                                 tests: cloned_tests,
+                                                 status: harness_status.structured_clone()});
+                         }]
+        }
+
+        on_event(window, 'load', function() {
+            this_obj.all_loaded = true;
+        });
+    }
+
+    WindowTestEnvironment.prototype._dispatch = function(selector, callback_args, message_arg) {
+        this._forEach_windows(
+                function(w, same_origin) {
+                    if (same_origin) {
+                        try {
+                            var has_selector = selector in w;
+                        } catch(e) {
+                            // If document.domain was set at some point same_origin can be
+                            // wrong and the above will fail.
+                            has_selector = false;
+                        }
+                        if (has_selector) {
+                            try {
+                                w[selector].apply(undefined, callback_args);
+                            } catch (e) {
+                                if (debug) {
+                                    throw e;
+                                }
+                            }
+                        }
+                    }
+                    if (supports_post_message(w) && w !== self) {
+                        w.postMessage(message_arg, "*");
+                    }
+                });
+    };
+
+    WindowTestEnvironment.prototype._forEach_windows = function(callback) {
+        // Iterate of the the windows [self ... top, opener]. The callback is passed
+        // two objects, the first one is the windows object itself, the second one
+        // is a boolean indicating whether or not its on the same origin as the
+        // current window.
+        var cache = this.window_cache;
+        if (!cache) {
+            cache = [[self, true]];
+            var w = self;
+            var i = 0;
+            var so;
+            var origins = location.ancestorOrigins;
+            while (w != w.parent) {
+                w = w.parent;
+                // In WebKit, calls to parent windows' properties that aren't on the same
+                // origin cause an error message to be displayed in the error console but
+                // don't throw an exception. This is a deviation from the current HTML5
+                // spec. See: https://bugs.webkit.org/show_bug.cgi?id=43504
+                // The problem with WebKit's behavior is that it pollutes the error console
+                // with error messages that can't be caught.
+                //
+                // This issue can be mitigated by relying on the (for now) proprietary
+                // `location.ancestorOrigins` property which returns an ordered list of
+                // the origins of enclosing windows. See:
+                // http://trac.webkit.org/changeset/113945.
+                if (origins) {
+                    so = (location.origin == origins[i]);
+                } else {
+                    so = is_same_origin(w);
+                }
+                cache.push([w, so]);
+                i++;
+            }
+            w = window.opener;
+            if (w) {
+                // window.opener isn't included in the `location.ancestorOrigins` prop.
+                // We'll just have to deal with a simple check and an error msg on WebKit
+                // browsers in this case.
+                cache.push([w, is_same_origin(w)]);
+            }
+            this.window_cache = cache;
+        }
+
+        forEach(cache,
+                function(a) {
+                    callback.apply(null, a);
+                });
+    };
+
+    WindowTestEnvironment.prototype.on_tests_ready = function() {
+        var output = new Output();
+        this.output_handler = output;
+
+        var this_obj = this;
+
+        add_start_callback(function (properties) {
+            this_obj.output_handler.init(properties);
+        });
+
+        add_test_state_callback(function(test) {
+            this_obj.output_handler.show_status();
+        });
+
+        add_result_callback(function (test) {
+            this_obj.output_handler.show_status();
+        });
+
+        add_completion_callback(function (tests, harness_status) {
+            this_obj.output_handler.show_results(tests, harness_status);
+        });
+        this.setup_messages(settings.message_events);
+    };
+
+    WindowTestEnvironment.prototype.setup_messages = function(new_events) {
+        var this_obj = this;
+        forEach(settings.message_events, function(x) {
+            var current_dispatch = this_obj.message_events.indexOf(x) !== -1;
+            var new_dispatch = new_events.indexOf(x) !== -1;
+            if (!current_dispatch && new_dispatch) {
+                this_obj.message_functions[x][0](this_obj.message_functions[x][2]);
+            } else if (current_dispatch && !new_dispatch) {
+                this_obj.message_functions[x][1](this_obj.message_functions[x][2]);
+            }
+        });
+        this.message_events = new_events;
+    }
+
+    WindowTestEnvironment.prototype.next_default_test_name = function() {
+        //Don't use document.title to work around an Opera bug in XHTML documents
+        var title = document.getElementsByTagName("title")[0];
+        var prefix = (title && title.firstChild && title.firstChild.data) || "Untitled";
+        var suffix = this.name_counter > 0 ? " " + this.name_counter : "";
+        this.name_counter++;
+        return prefix + suffix;
+    };
+
+    WindowTestEnvironment.prototype.on_new_harness_properties = function(properties) {
+        this.output_handler.setup(properties);
+        if (properties.hasOwnProperty("message_events")) {
+            this.setup_messages(properties.message_events);
+        }
+    };
+
+    WindowTestEnvironment.prototype.add_on_loaded_callback = function(callback) {
+        on_event(window, 'load', callback);
+    };
+
+    WindowTestEnvironment.prototype.test_timeout = function() {
+        var metas = document.getElementsByTagName("meta");
+        for (var i = 0; i < metas.length; i++) {
+            if (metas[i].name == "timeout") {
+                if (metas[i].content == "long") {
+                    return settings.harness_timeout.long;
+                }
+                break;
+            }
+        }
+        return settings.harness_timeout.normal;
+    };
+
+    WindowTestEnvironment.prototype.global_scope = function() {
+        return window;
+    };
+
+    /*
+     * Base TestEnvironment implementation for a generic web worker.
+     *
+     * Workers accumulate test results. One or more clients can connect and
+     * retrieve results from a worker at any time.
+     *
+     * WorkerTestEnvironment supports communicating with a client via a
+     * MessagePort.  The mechanism for determining the appropriate MessagePort
+     * for communicating with a client depends on the type of worker and is
+     * implemented by the various specializations of WorkerTestEnvironment
+     * below.
+     *
+     * A client document using testharness can use fetch_tests_from_worker() to
+     * retrieve results from a worker. See apisample16.html.
+     */
+    function WorkerTestEnvironment() {
+        this.name_counter = 0;
+        this.all_loaded = true;
+        this.message_list = [];
+        this.message_ports = [];
+    }
+
+    WorkerTestEnvironment.prototype._dispatch = function(message) {
+        this.message_list.push(message);
+        for (var i = 0; i < this.message_ports.length; ++i)
+        {
+            this.message_ports[i].postMessage(message);
+        }
+    };
+
+    // The only requirement is that port has a postMessage() method. It doesn't
+    // have to be an instance of a MessagePort, and often isn't.
+    WorkerTestEnvironment.prototype._add_message_port = function(port) {
+        this.message_ports.push(port);
+        for (var i = 0; i < this.message_list.length; ++i)
+        {
+            port.postMessage(this.message_list[i]);
+        }
+    };
+
+    WorkerTestEnvironment.prototype.next_default_test_name = function() {
+        var suffix = this.name_counter > 0 ? " " + this.name_counter : "";
+        this.name_counter++;
+        return "Untitled" + suffix;
+    };
+
+    WorkerTestEnvironment.prototype.on_new_harness_properties = function() {};
+
+    WorkerTestEnvironment.prototype.on_tests_ready = function() {
+        var this_obj = this;
+        add_start_callback(
+                function(properties) {
+                    this_obj._dispatch({
+                        type: "start",
+                        properties: properties,
+                    });
+                });
+        add_test_state_callback(
+                function(test) {
+                    this_obj._dispatch({
+                        type: "test_state",
+                        test: test.structured_clone()
+                    });
+                });
+        add_result_callback(
+                function(test) {
+                    this_obj._dispatch({
+                        type: "result",
+                        test: test.structured_clone()
+                    });
+                });
+        add_completion_callback(
+                function(tests, harness_status) {
+                    this_obj._dispatch({
+                        type: "complete",
+                        tests: map(tests,
+                            function(test) {
+                                return test.structured_clone();
+                            }),
+                        status: harness_status.structured_clone()
+                    });
+                });
+    };
+
+    WorkerTestEnvironment.prototype.add_on_loaded_callback = function() {};
+
+    WorkerTestEnvironment.prototype.test_timeout = function() {
+        // Tests running in a worker don't have a default timeout. I.e. all
+        // worker tests behave as if settings.explicit_timeout is true.
+        return null;
+    };
+
+    WorkerTestEnvironment.prototype.global_scope = function() {
+        return self;
+    };
+
+    /*
+     * Dedicated web workers.
+     * https://html.spec.whatwg.org/multipage/workers.html#dedicatedworkerglobalscope
+     *
+     * This class is used as the test_environment when testharness is running
+     * inside a dedicated worker.
+     */
+    function DedicatedWorkerTestEnvironment() {
+        WorkerTestEnvironment.call(this);
+        // self is an instance of DedicatedWorkerGlobalScope which exposes
+        // a postMessage() method for communicating via the message channel
+        // established when the worker is created.
+        this._add_message_port(self);
+    }
+    DedicatedWorkerTestEnvironment.prototype = Object.create(WorkerTestEnvironment.prototype);
+
+    DedicatedWorkerTestEnvironment.prototype.on_tests_ready = function() {
+        WorkerTestEnvironment.prototype.on_tests_ready.call(this);
+        // In the absence of an onload notification, we a require dedicated
+        // workers to explicitly signal when the tests are done.
+        tests.wait_for_finish = true;
+    };
+
+    /*
+     * Shared web workers.
+     * https://html.spec.whatwg.org/multipage/workers.html#sharedworkerglobalscope
+     *
+     * This class is used as the test_environment when testharness is running
+     * inside a shared web worker.
+     */
+    function SharedWorkerTestEnvironment() {
+        WorkerTestEnvironment.call(this);
+        var this_obj = this;
+        // Shared workers receive message ports via the 'onconnect' event for
+        // each connection.
+        self.addEventListener("connect",
+                function(message_event) {
+                    this_obj._add_message_port(message_event.source);
+                });
+    }
+    SharedWorkerTestEnvironment.prototype = Object.create(WorkerTestEnvironment.prototype);
+
+    SharedWorkerTestEnvironment.prototype.on_tests_ready = function() {
+        WorkerTestEnvironment.prototype.on_tests_ready.call(this);
+        // In the absence of an onload notification, we a require shared
+        // workers to explicitly signal when the tests are done.
+        tests.wait_for_finish = true;
+    };
+
+    /*
+     * Service workers.
+     * http://www.w3.org/TR/service-workers/
+     *
+     * This class is used as the test_environment when testharness is running
+     * inside a service worker.
+     */
+    function ServiceWorkerTestEnvironment() {
+        WorkerTestEnvironment.call(this);
+        this.all_loaded = false;
+        this.on_loaded_callback = null;
+        var this_obj = this;
+        self.addEventListener("message",
+                function(event) {
+                    if (event.data.type && event.data.type === "connect") {
+                        if (event.ports && event.ports[0]) {
+                            // If a MessageChannel was passed, then use it to
+                            // send results back to the main window.  This
+                            // allows the tests to work even if the browser
+                            // does not fully support MessageEvent.source in
+                            // ServiceWorkers yet.
+                            this_obj._add_message_port(event.ports[0]);
+                            event.ports[0].start();
+                        } else {
+                            // If there is no MessageChannel, then attempt to
+                            // use the MessageEvent.source to send results
+                            // back to the main window.
+                            this_obj._add_message_port(event.source);
+                        }
+                    }
+                });
+
+        // The oninstall event is received after the service worker script and
+        // all imported scripts have been fetched and executed. It's the
+        // equivalent of an onload event for a document. All tests should have
+        // been added by the time this event is received, thus it's not
+        // necessary to wait until the onactivate event.
+        on_event(self, "install",
+                function(event) {
+                    this_obj.all_loaded = true;
+                    if (this_obj.on_loaded_callback) {
+                        this_obj.on_loaded_callback();
+                    }
+                });
+    }
+    ServiceWorkerTestEnvironment.prototype = Object.create(WorkerTestEnvironment.prototype);
+
+    ServiceWorkerTestEnvironment.prototype.add_on_loaded_callback = function(callback) {
+        if (this.all_loaded) {
+            callback();
+        } else {
+            this.on_loaded_callback = callback;
+        }
+    };
+
+    function create_test_environment() {
+        if ('document' in self) {
+            return new WindowTestEnvironment();
+        }
+        if ('DedicatedWorkerGlobalScope' in self &&
+            self instanceof DedicatedWorkerGlobalScope) {
+            return new DedicatedWorkerTestEnvironment();
+        }
+        if ('SharedWorkerGlobalScope' in self &&
+            self instanceof SharedWorkerGlobalScope) {
+            return new SharedWorkerTestEnvironment();
+        }
+        if ('ServiceWorkerGlobalScope' in self &&
+            self instanceof ServiceWorkerGlobalScope) {
+            return new ServiceWorkerTestEnvironment();
+        }
+        throw new Error("Unsupported test environment");
+    }
+
+    var test_environment = create_test_environment();
+
+    function is_shared_worker(worker) {
+        return 'SharedWorker' in self && worker instanceof SharedWorker;
+    }
+
+    function is_service_worker(worker) {
+        return 'ServiceWorker' in self && worker instanceof ServiceWorker;
+    }
+
+    /*
+     * API functions
+     */
+
+    function test(func, name, properties)
+    {
+        var test_name = name ? name : test_environment.next_default_test_name();
+        properties = properties ? properties : {};
+        var test_obj = new Test(test_name, properties);
+        test_obj.step(func, test_obj, test_obj);
+        if (test_obj.phase === test_obj.phases.STARTED) {
+            test_obj.done();
+        }
+    }
+
+    function async_test(func, name, properties)
+    {
+        if (typeof func !== "function") {
+            properties = name;
+            name = func;
+            func = null;
+        }
+        var test_name = name ? name : test_environment.next_default_test_name();
+        properties = properties ? properties : {};
+        var test_obj = new Test(test_name, properties);
+        if (func) {
+            test_obj.step(func, test_obj, test_obj);
+        }
+        return test_obj;
+    }
+
+    function promise_test(func, name, properties) {
+        var test = async_test(name, properties);
+        // If there is no promise tests queue make one.
+        test.step(function() {
+            if (!tests.promise_tests) {
+                tests.promise_tests = Promise.resolve();
+            }
+        });
+        tests.promise_tests = tests.promise_tests.then(function() {
+            return Promise.resolve(test.step(func, test, test))
+                .then(
+                    function() {
+                        test.done();
+                    })
+                .catch(test.step_func(
+                    function(value) {
+                        if (value instanceof AssertionError) {
+                            throw value;
+                        }
+                        assert(false, "promise_test", null,
+                               "Unhandled rejection with value: ${value}", {value:value});
+                    }));
+        });
+    }
+
+    function promise_rejects(test, expected, promise) {
+        return promise.then(test.unreached_func("Should have rejected.")).catch(function(e) {
+            assert_throws(expected, function() { throw e });
+        });
+    }
+
+    /**
+     * This constructor helper allows DOM events to be handled using Promises,
+     * which can make it a lot easier to test a very specific series of events,
+     * including ensuring that unexpected events are not fired at any point.
+     */
+    function EventWatcher(test, watchedNode, eventTypes)
+    {
+        if (typeof eventTypes == 'string') {
+            eventTypes = [eventTypes];
+        }
+
+        var waitingFor = null;
+
+        var eventHandler = test.step_func(function(evt) {
+            assert_true(!!waitingFor,
+                        'Not expecting event, but got ' + evt.type + ' event');
+            assert_equals(evt.type, waitingFor.types[0],
+                          'Expected ' + waitingFor.types[0] + ' event, but got ' +
+                          evt.type + ' event instead');
+            if (waitingFor.types.length > 1) {
+                // Pop first event from array
+                waitingFor.types.shift();
+                return;
+            }
+            // We need to null out waitingFor before calling the resolve function
+            // since the Promise's resolve handlers may call wait_for() which will
+            // need to set waitingFor.
+            var resolveFunc = waitingFor.resolve;
+            waitingFor = null;
+            resolveFunc(evt);
+        });
+
+        for (var i = 0; i < eventTypes.length; i++) {
+            watchedNode.addEventListener(eventTypes[i], eventHandler);
+        }
+
+        /**
+         * Returns a Promise that will resolve after the specified event or
+         * series of events has occured.
+         */
+        this.wait_for = function(types) {
+            if (waitingFor) {
+                return Promise.reject('Already waiting for an event or events');
+            }
+            if (typeof types == 'string') {
+                types = [types];
+            }
+            return new Promise(function(resolve, reject) {
+                waitingFor = {
+                    types: types,
+                    resolve: resolve,
+                    reject: reject
+                };
+            });
+        };
+
+        function stop_watching() {
+            for (var i = 0; i < eventTypes.length; i++) {
+                watchedNode.removeEventListener(eventTypes[i], eventHandler);
+            }
+        };
+
+        test.add_cleanup(stop_watching);
+
+        return this;
+    }
+    expose(EventWatcher, 'EventWatcher');
+
+    function setup(func_or_properties, maybe_properties)
+    {
+        var func = null;
+        var properties = {};
+        if (arguments.length === 2) {
+            func = func_or_properties;
+            properties = maybe_properties;
+        } else if (func_or_properties instanceof Function) {
+            func = func_or_properties;
+        } else {
+            properties = func_or_properties;
+        }
+        tests.setup(func, properties);
+        test_environment.on_new_harness_properties(properties);
+    }
+
+    function done() {
+        if (tests.tests.length === 0) {
+            tests.set_file_is_test();
+        }
+        if (tests.file_is_test) {
+            tests.tests[0].done();
+        }
+        tests.end_wait();
+    }
+
+    function generate_tests(func, args, properties) {
+        forEach(args, function(x, i)
+                {
+                    var name = x[0];
+                    test(function()
+                         {
+                             func.apply(this, x.slice(1));
+                         },
+                         name,
+                         Array.isArray(properties) ? properties[i] : properties);
+                });
+    }
+
+    function on_event(object, event, callback)
+    {
+        object.addEventListener(event, callback, false);
+    }
+
+    function step_timeout(f, t) {
+        var outer_this = this;
+        var args = Array.prototype.slice.call(arguments, 2);
+        return setTimeout(function() {
+            f.apply(outer_this, args);
+        }, t * tests.timeout_multiplier);
+    }
+
+    expose(test, 'test');
+    expose(async_test, 'async_test');
+    expose(promise_test, 'promise_test');
+    expose(promise_rejects, 'promise_rejects');
+    expose(generate_tests, 'generate_tests');
+    expose(setup, 'setup');
+    expose(done, 'done');
+    expose(on_event, 'on_event');
+    expose(step_timeout, 'step_timeout');
+
+    /*
+     * Return a string truncated to the given length, with ... added at the end
+     * if it was longer.
+     */
+    function truncate(s, len)
+    {
+        if (s.length > len) {
+            return s.substring(0, len - 3) + "...";
+        }
+        return s;
+    }
+
+    /*
+     * Return true if object is probably a Node object.
+     */
+    function is_node(object)
+    {
+        // I use duck-typing instead of instanceof, because
+        // instanceof doesn't work if the node is from another window (like an
+        // iframe's contentWindow):
+        // http://www.w3.org/Bugs/Public/show_bug.cgi?id=12295
+        if ("nodeType" in object &&
+            "nodeName" in object &&
+            "nodeValue" in object &&
+            "childNodes" in object) {
+            try {
+                object.nodeType;
+            } catch (e) {
+                // The object is probably Node.prototype or another prototype
+                // object that inherits from it, and not a Node instance.
+                return false;
+            }
+            return true;
+        }
+        return false;
+    }
+
+    /*
+     * Convert a value to a nice, human-readable string
+     */
+    function format_value(val, seen)
+    {
+        if (!seen) {
+            seen = [];
+        }
+        if (typeof val === "object" && val !== null) {
+            if (seen.indexOf(val) >= 0) {
+                return "[...]";
+            }
+            seen.push(val);
+        }
+        if (Array.isArray(val)) {
+            return "[" + val.map(function(x) {return format_value(x, seen);}).join(", ") + "]";
+        }
+
+        switch (typeof val) {
+        case "string":
+            val = val.replace("\\", "\\\\");
+            for (var i = 0; i < 32; i++) {
+                var replace = "\\";
+                switch (i) {
+                case 0: replace += "0"; break;
+                case 1: replace += "x01"; break;
+                case 2: replace += "x02"; break;
+                case 3: replace += "x03"; break;
+                case 4: replace += "x04"; break;
+                case 5: replace += "x05"; break;
+                case 6: replace += "x06"; break;
+                case 7: replace += "x07"; break;
+                case 8: replace += "b"; break;
+                case 9: replace += "t"; break;
+                case 10: replace += "n"; break;
+                case 11: replace += "v"; break;
+                case 12: replace += "f"; break;
+                case 13: replace += "r"; break;
+                case 14: replace += "x0e"; break;
+                case 15: replace += "x0f"; break;
+                case 16: replace += "x10"; break;
+                case 17: replace += "x11"; break;
+                case 18: replace += "x12"; break;
+                case 19: replace += "x13"; break;
+                case 20: replace += "x14"; break;
+                case 21: replace += "x15"; break;
+                case 22: replace += "x16"; break;
+                case 23: replace += "x17"; break;
+                case 24: replace += "x18"; break;
+                case 25: replace += "x19"; break;
+                case 26: replace += "x1a"; break;
+                case 27: replace += "x1b"; break;
+                case 28: replace += "x1c"; break;
+                case 29: replace += "x1d"; break;
+                case 30: replace += "x1e"; break;
+                case 31: replace += "x1f"; break;
+                }
+                val = val.replace(RegExp(String.fromCharCode(i), "g"), replace);
+            }
+            return '"' + val.replace(/"/g, '\\"') + '"';
+        case "boolean":
+        case "undefined":
+            return String(val);
+        case "number":
+            // In JavaScript, -0 === 0 and String(-0) == "0", so we have to
+            // special-case.
+            if (val === -0 && 1/val === -Infinity) {
+                return "-0";
+            }
+            return String(val);
+        case "object":
+            if (val === null) {
+                return "null";
+            }
+
+            // Special-case Node objects, since those come up a lot in my tests.  I
+            // ignore namespaces.
+            if (is_node(val)) {
+                switch (val.nodeType) {
+                case Node.ELEMENT_NODE:
+                    var ret = "<" + val.localName;
+                    for (var i = 0; i < val.attributes.length; i++) {
+                        ret += " " + val.attributes[i].name + '="' + val.attributes[i].value + '"';
+                    }
+                    ret += ">" + val.innerHTML + "</" + val.localName + ">";
+                    return "Element node " + truncate(ret, 60);
+                case Node.TEXT_NODE:
+                    return 'Text node "' + truncate(val.data, 60) + '"';
+                case Node.PROCESSING_INSTRUCTION_NODE:
+                    return "ProcessingInstruction node with target " + format_value(truncate(val.target, 60)) + " and data " + format_value(truncate(val.data, 60));
+                case Node.COMMENT_NODE:
+                    return "Comment node <!--" + truncate(val.data, 60) + "-->";
+                case Node.DOCUMENT_NODE:
+                    return "Document node with " + val.childNodes.length + (val.childNodes.length == 1 ? " child" : " children");
+                case Node.DOCUMENT_TYPE_NODE:
+                    return "DocumentType node";
+                case Node.DOCUMENT_FRAGMENT_NODE:
+                    return "DocumentFragment node with " + val.childNodes.length + (val.childNodes.length == 1 ? " child" : " children");
+                default:
+                    return "Node object of unknown type";
+                }
+            }
+
+        /* falls through */
+        default:
+            return typeof val + ' "' + truncate(String(val), 60) + '"';
+        }
+    }
+    expose(format_value, "format_value");
+
+    /*
+     * Assertions
+     */
+
+    function assert_true(actual, description)
+    {
+        assert(actual === true, "assert_true", description,
+                                "expected true got ${actual}", {actual:actual});
+    }
+    expose(assert_true, "assert_true");
+
+    function assert_false(actual, description)
+    {
+        assert(actual === false, "assert_false", description,
+                                 "expected false got ${actual}", {actual:actual});
+    }
+    expose(assert_false, "assert_false");
+
+    function same_value(x, y) {
+        if (y !== y) {
+            //NaN case
+            return x !== x;
+        }
+        if (x === 0 && y === 0) {
+            //Distinguish +0 and -0
+            return 1/x === 1/y;
+        }
+        return x === y;
+    }
+
+    function assert_equals(actual, expected, description)
+    {
+         /*
+          * Test if two primitives are equal or two objects
+          * are the same object
+          */
+        if (typeof actual != typeof expected) {
+            assert(false, "assert_equals", description,
+                          "expected (" + typeof expected + ") ${expected} but got (" + typeof actual + ") ${actual}",
+                          {expected:expected, actual:actual});
+            return;
+        }
+        assert(same_value(actual, expected), "assert_equals", description,
+                                             "expected ${expected} but got ${actual}",
+                                             {expected:expected, actual:actual});
+    }
+    expose(assert_equals, "assert_equals");
+
+    function assert_not_equals(actual, expected, description)
+    {
+         /*
+          * Test if two primitives are unequal or two objects
+          * are different objects
+          */
+        assert(!same_value(actual, expected), "assert_not_equals", description,
+                                              "got disallowed value ${actual}",
+                                              {actual:actual});
+    }
+    expose(assert_not_equals, "assert_not_equals");
+
+    function assert_in_array(actual, expected, description)
+    {
+        assert(expected.indexOf(actual) != -1, "assert_in_array", description,
+                                               "value ${actual} not in array ${expected}",
+                                               {actual:actual, expected:expected});
+    }
+    expose(assert_in_array, "assert_in_array");
+
+    function assert_object_equals(actual, expected, description)
+    {
+         //This needs to be improved a great deal
+         function check_equal(actual, expected, stack)
+         {
+             stack.push(actual);
+
+             var p;
+             for (p in actual) {
+                 assert(expected.hasOwnProperty(p), "assert_object_equals", description,
+                                                    "unexpected property ${p}", {p:p});
+
+                 if (typeof actual[p] === "object" && actual[p] !== null) {
+                     if (stack.indexOf(actual[p]) === -1) {
+                         check_equal(actual[p], expected[p], stack);
+                     }
+                 } else {
+                     assert(same_value(actual[p], expected[p]), "assert_object_equals", description,
+                                                       "property ${p} expected ${expected} got ${actual}",
+                                                       {p:p, expected:expected, actual:actual});
+                 }
+             }
+             for (p in expected) {
+                 assert(actual.hasOwnProperty(p),
+                        "assert_object_equals", description,
+                        "expected property ${p} missing", {p:p});
+             }
+             stack.pop();
+         }
+         check_equal(actual, expected, []);
+    }
+    expose(assert_object_equals, "assert_object_equals");
+
+    function assert_array_equals(actual, expected, description)
+    {
+        assert(actual.length === expected.length,
+               "assert_array_equals", description,
+               "lengths differ, expected ${expected} got ${actual}",
+               {expected:expected.length, actual:actual.length});
+
+        for (var i = 0; i < actual.length; i++) {
+            assert(actual.hasOwnProperty(i) === expected.hasOwnProperty(i),
+                   "assert_array_equals", description,
+                   "property ${i}, property expected to be ${expected} but was ${actual}",
+                   {i:i, expected:expected.hasOwnProperty(i) ? "present" : "missing",
+                   actual:actual.hasOwnProperty(i) ? "present" : "missing"});
+            assert(same_value(expected[i], actual[i]),
+                   "assert_array_equals", description,
+                   "property ${i}, expected ${expected} but got ${actual}",
+                   {i:i, expected:expected[i], actual:actual[i]});
+        }
+    }
+    expose(assert_array_equals, "assert_array_equals");
+
+    function assert_approx_equals(actual, expected, epsilon, description)
+    {
+        /*
+         * Test if two primitive numbers are equal withing +/- epsilon
+         */
+        assert(typeof actual === "number",
+               "assert_approx_equals", description,
+               "expected a number but got a ${type_actual}",
+               {type_actual:typeof actual});
+
+        assert(Math.abs(actual - expected) <= epsilon,
+               "assert_approx_equals", description,
+               "expected ${expected} +/- ${epsilon} but got ${actual}",
+               {expected:expected, actual:actual, epsilon:epsilon});
+    }
+    expose(assert_approx_equals, "assert_approx_equals");
+
+    function assert_less_than(actual, expected, description)
+    {
+        /*
+         * Test if a primitive number is less than another
+         */
+        assert(typeof actual === "number",
+               "assert_less_than", description,
+               "expected a number but got a ${type_actual}",
+               {type_actual:typeof actual});
+
+        assert(actual < expected,
+               "assert_less_than", description,
+               "expected a number less than ${expected} but got ${actual}",
+               {expected:expected, actual:actual});
+    }
+    expose(assert_less_than, "assert_less_than");
+
+    function assert_greater_than(actual, expected, description)
+    {
+        /*
+         * Test if a primitive number is greater than another
+         */
+        assert(typeof actual === "number",
+               "assert_greater_than", description,
+               "expected a number but got a ${type_actual}",
+               {type_actual:typeof actual});
+
+        assert(actual > expected,
+               "assert_greater_than", description,
+               "expected a number greater than ${expected} but got ${actual}",
+               {expected:expected, actual:actual});
+    }
+    expose(assert_greater_than, "assert_greater_than");
+
+    function assert_between_exclusive(actual, lower, upper, description)
+    {
+        /*
+         * Test if a primitive number is between two others
+         */
+        assert(typeof actual === "number",
+               "assert_between_exclusive", description,
+               "expected a number but got a ${type_actual}",
+               {type_actual:typeof actual});
+
+        assert(actual > lower && actual < upper,
+               "assert_between_exclusive", description,
+               "expected a number greater than ${lower} " +
+               "and less than ${upper} but got ${actual}",
+               {lower:lower, upper:upper, actual:actual});
+    }
+    expose(assert_between_exclusive, "assert_between_exclusive");
+
+    function assert_less_than_equal(actual, expected, description)
+    {
+        /*
+         * Test if a primitive number is less than or equal to another
+         */
+        assert(typeof actual === "number",
+               "assert_less_than_equal", description,
+               "expected a number but got a ${type_actual}",
+               {type_actual:typeof actual});
+
+        assert(actual <= expected,
+               "assert_less_than_equal", description,
+               "expected a number less than or equal to ${expected} but got ${actual}",
+               {expected:expected, actual:actual});
+    }
+    expose(assert_less_than_equal, "assert_less_than_equal");
+
+    function assert_greater_than_equal(actual, expected, description)
+    {
+        /*
+         * Test if a primitive number is greater than or equal to another
+         */
+        assert(typeof actual === "number",
+               "assert_greater_than_equal", description,
+               "expected a number but got a ${type_actual}",
+               {type_actual:typeof actual});
+
+        assert(actual >= expected,
+               "assert_greater_than_equal", description,
+               "expected a number greater than or equal to ${expected} but got ${actual}",
+               {expected:expected, actual:actual});
+    }
+    expose(assert_greater_than_equal, "assert_greater_than_equal");
+
+    function assert_between_inclusive(actual, lower, upper, description)
+    {
+        /*
+         * Test if a primitive number is between to two others or equal to either of them
+         */
+        assert(typeof actual === "number",
+               "assert_between_inclusive", description,
+               "expected a number but got a ${type_actual}",
+               {type_actual:typeof actual});
+
+        assert(actual >= lower && actual <= upper,
+               "assert_between_inclusive", description,
+               "expected a number greater than or equal to ${lower} " +
+               "and less than or equal to ${upper} but got ${actual}",
+               {lower:lower, upper:upper, actual:actual});
+    }
+    expose(assert_between_inclusive, "assert_between_inclusive");
+
+    function assert_regexp_match(actual, expected, description) {
+        /*
+         * Test if a string (actual) matches a regexp (expected)
+         */
+        assert(expected.test(actual),
+               "assert_regexp_match", description,
+               "expected ${expected} but got ${actual}",
+               {expected:expected, actual:actual});
+    }
+    expose(assert_regexp_match, "assert_regexp_match");
+
+    function assert_class_string(object, class_string, description) {
+        assert_equals({}.toString.call(object), "[object " + class_string + "]",
+                      description);
+    }
+    expose(assert_class_string, "assert_class_string");
+
+
+    function _assert_own_property(name) {
+        return function(object, property_name, description)
+        {
+            assert(object.hasOwnProperty(property_name),
+                   name, description,
+                   "expected property ${p} missing", {p:property_name});
+        };
+    }
+    expose(_assert_own_property("assert_exists"), "assert_exists");
+    expose(_assert_own_property("assert_own_property"), "assert_own_property");
+
+    function assert_not_exists(object, property_name, description)
+    {
+        assert(!object.hasOwnProperty(property_name),
+               "assert_not_exists", description,
+               "unexpected property ${p} found", {p:property_name});
+    }
+    expose(assert_not_exists, "assert_not_exists");
+
+    function _assert_inherits(name) {
+        return function (object, property_name, description)
+        {
+            assert(typeof object === "object",
+                   name, description,
+                   "provided value is not an object");
+
+            assert("hasOwnProperty" in object,
+                   name, description,
+                   "provided value is an object but has no hasOwnProperty method");
+
+            assert(!object.hasOwnProperty(property_name),
+                   name, description,
+                   "property ${p} found on object expected in prototype chain",
+                   {p:property_name});
+
+            assert(property_name in object,
+                   name, description,
+                   "property ${p} not found in prototype chain",
+                   {p:property_name});
+        };
+    }
+    expose(_assert_inherits("assert_inherits"), "assert_inherits");
+    expose(_assert_inherits("assert_idl_attribute"), "assert_idl_attribute");
+
+    function assert_readonly(object, property_name, description)
+    {
+         var initial_value = object[property_name];
+         try {
+             //Note that this can have side effects in the case where
+             //the property has PutForwards
+             object[property_name] = initial_value + "a"; //XXX use some other value here?
+             assert(same_value(object[property_name], initial_value),
+                    "assert_readonly", description,
+                    "changing property ${p} succeeded",
+                    {p:property_name});
+         } finally {
+             object[property_name] = initial_value;
+         }
+    }
+    expose(assert_readonly, "assert_readonly");
+
+    function assert_throws(code, func, description)
+    {
+        try {
+            func.call(this);
+            assert(false, "assert_throws", description,
+                   "${func} did not throw", {func:func});
+        } catch (e) {
+            if (e instanceof AssertionError) {
+                throw e;
+            }
+            if (code === null) {
+                return;
+            }
+            if (typeof code === "object") {
+                assert(typeof e == "object" && "name" in e && e.name == code.name,
+                       "assert_throws", description,
+                       "${func} threw ${actual} (${actual_name}) expected ${expected} (${expected_name})",
+                                    {func:func, actual:e, actual_name:e.name,
+                                     expected:code,
+                                     expected_name:code.name});
+                return;
+            }
+
+            var code_name_map = {
+                INDEX_SIZE_ERR: 'IndexSizeError',
+                HIERARCHY_REQUEST_ERR: 'HierarchyRequestError',
+                WRONG_DOCUMENT_ERR: 'WrongDocumentError',
+                INVALID_CHARACTER_ERR: 'InvalidCharacterError',
+                NO_MODIFICATION_ALLOWED_ERR: 'NoModificationAllowedError',
+                NOT_FOUND_ERR: 'NotFoundError',
+                NOT_SUPPORTED_ERR: 'NotSupportedError',
+                INVALID_STATE_ERR: 'InvalidStateError',
+                SYNTAX_ERR: 'SyntaxError',
+                INVALID_MODIFICATION_ERR: 'InvalidModificationError',
+                NAMESPACE_ERR: 'NamespaceError',
+                INVALID_ACCESS_ERR: 'InvalidAccessError',
+                TYPE_MISMATCH_ERR: 'TypeMismatchError',
+                SECURITY_ERR: 'SecurityError',
+                NETWORK_ERR: 'NetworkError',
+                ABORT_ERR: 'AbortError',
+                URL_MISMATCH_ERR: 'URLMismatchError',
+                QUOTA_EXCEEDED_ERR: 'QuotaExceededError',
+                TIMEOUT_ERR: 'TimeoutError',
+                INVALID_NODE_TYPE_ERR: 'InvalidNodeTypeError',
+                DATA_CLONE_ERR: 'DataCloneError'
+            };
+
+            var name = code in code_name_map ? code_name_map[code] : code;
+
+            var name_code_map = {
+                IndexSizeError: 1,
+                HierarchyRequestError: 3,
+                WrongDocumentError: 4,
+                InvalidCharacterError: 5,
+                NoModificationAllowedError: 7,
+                NotFoundError: 8,
+                NotSupportedError: 9,
+                InvalidStateError: 11,
+                SyntaxError: 12,
+                InvalidModificationError: 13,
+                NamespaceError: 14,
+                InvalidAccessError: 15,
+                TypeMismatchError: 17,
+                SecurityError: 18,
+                NetworkError: 19,
+                AbortError: 20,
+                URLMismatchError: 21,
+                QuotaExceededError: 22,
+                TimeoutError: 23,
+                InvalidNodeTypeError: 24,
+                DataCloneError: 25,
+
+                EncodingError: 0,
+                NotReadableError: 0,
+                UnknownError: 0,
+                ConstraintError: 0,
+                DataError: 0,
+                TransactionInactiveError: 0,
+                ReadOnlyError: 0,
+                VersionError: 0,
+                OperationError: 0,
+            };
+
+            if (!(name in name_code_map)) {
+                throw new AssertionError('Test bug: unrecognized DOMException code "' + code + '" passed to assert_throws()');
+            }
+
+            var required_props = { code: name_code_map[name] };
+
+            if (required_props.code === 0 ||
+               (typeof e == "object" &&
+                "name" in e &&
+                e.name !== e.name.toUpperCase() &&
+                e.name !== "DOMException")) {
+                // New style exception: also test the name property.
+                required_props.name = name;
+            }
+
+            //We'd like to test that e instanceof the appropriate interface,
+            //but we can't, because we don't know what window it was created
+            //in.  It might be an instanceof the appropriate interface on some
+            //unknown other window.  TODO: Work around this somehow?
+
+            assert(typeof e == "object",
+                   "assert_throws", description,
+                   "${func} threw ${e} with type ${type}, not an object",
+                   {func:func, e:e, type:typeof e});
+
+            for (var prop in required_props) {
+                assert(typeof e == "object" && prop in e && e[prop] == required_props[prop],
+                       "assert_throws", description,
+                       "${func} threw ${e} that is not a DOMException " + code + ": property ${prop} is equal to ${actual}, expected ${expected}",
+                       {func:func, e:e, prop:prop, actual:e[prop], expected:required_props[prop]});
+            }
+        }
+    }
+    expose(assert_throws, "assert_throws");
+
+    function assert_unreached(description) {
+         assert(false, "assert_unreached", description,
+                "Reached unreachable code");
+    }
+    expose(assert_unreached, "assert_unreached");
+
+    function assert_any(assert_func, actual, expected_array)
+    {
+        var args = [].slice.call(arguments, 3);
+        var errors = [];
+        var passed = false;
+        forEach(expected_array,
+                function(expected)
+                {
+                    try {
+                        assert_func.apply(this, [actual, expected].concat(args));
+                        passed = true;
+                    } catch (e) {
+                        errors.push(e.message);
+                    }
+                });
+        if (!passed) {
+            throw new AssertionError(errors.join("\n\n"));
+        }
+    }
+    expose(assert_any, "assert_any");
+
+    function Test(name, properties)
+    {
+        if (tests.file_is_test && tests.tests.length) {
+            throw new Error("Tried to create a test with file_is_test");
+        }
+        this.name = name;
+
+        this.phase = this.phases.INITIAL;
+
+        this.status = this.NOTRUN;
+        this.timeout_id = null;
+        this.index = null;
+
+        this.properties = properties;
+        var timeout = properties.timeout ? properties.timeout : settings.test_timeout;
+        if (timeout !== null) {
+            this.timeout_length = timeout * tests.timeout_multiplier;
+        } else {
+            this.timeout_length = null;
+        }
+
+        this.message = null;
+        this.stack = null;
+
+        this.steps = [];
+
+        this.cleanup_callbacks = [];
+
+        tests.push(this);
+    }
+
+    Test.statuses = {
+        PASS:0,
+        FAIL:1,
+        TIMEOUT:2,
+        NOTRUN:3
+    };
+
+    Test.prototype = merge({}, Test.statuses);
+
+    Test.prototype.phases = {
+        INITIAL:0,
+        STARTED:1,
+        HAS_RESULT:2,
+        COMPLETE:3
+    };
+
+    Test.prototype.structured_clone = function()
+    {
+        if (!this._structured_clone) {
+            var msg = this.message;
+            msg = msg ? String(msg) : msg;
+            this._structured_clone = merge({
+                name:String(this.name),
+                properties:merge({}, this.properties),
+            }, Test.statuses);
+        }
+        this._structured_clone.status = this.status;
+        this._structured_clone.message = this.message;
+        this._structured_clone.stack = this.stack;
+        this._structured_clone.index = this.index;
+        return this._structured_clone;
+    };
+
+    Test.prototype.step = function(func, this_obj)
+    {
+        if (this.phase > this.phases.STARTED) {
+            return;
+        }
+        this.phase = this.phases.STARTED;
+        //If we don't get a result before the harness times out that will be a test timout
+        this.set_status(this.TIMEOUT, "Test timed out");
+
+        tests.started = true;
+        tests.notify_test_state(this);
+
+        if (this.timeout_id === null) {
+            this.set_timeout();
+        }
+
+        this.steps.push(func);
+
+        if (arguments.length === 1) {
+            this_obj = this;
+        }
+
+        try {
+            return func.apply(this_obj, Array.prototype.slice.call(arguments, 2));
+        } catch (e) {
+            if (this.phase >= this.phases.HAS_RESULT) {
+                return;
+            }
+            var message = String((typeof e === "object" && e !== null) ? e.message : e);
+            var stack = e.stack ? e.stack : null;
+
+            this.set_status(this.FAIL, message, stack);
+            this.phase = this.phases.HAS_RESULT;
+            this.done();
+        }
+    };
+
+    Test.prototype.step_func = function(func, this_obj)
+    {
+        var test_this = this;
+
+        if (arguments.length === 1) {
+            this_obj = test_this;
+        }
+
+        return function()
+        {
+            return test_this.step.apply(test_this, [func, this_obj].concat(
+                Array.prototype.slice.call(arguments)));
+        };
+    };
+
+    Test.prototype.step_func_done = function(func, this_obj)
+    {
+        var test_this = this;
+
+        if (arguments.length === 1) {
+            this_obj = test_this;
+        }
+
+        return function()
+        {
+            if (func) {
+                test_this.step.apply(test_this, [func, this_obj].concat(
+                    Array.prototype.slice.call(arguments)));
+            }
+            test_this.done();
+        };
+    };
+
+    Test.prototype.unreached_func = function(description)
+    {
+        return this.step_func(function() {
+            assert_unreached(description);
+        });
+    };
+
+    Test.prototype.step_timeout = function(f, timeout) {
+        var test_this = this;
+        var args = Array.prototype.slice.call(arguments, 2);
+        return setTimeout(this.step_func(function() {
+            return f.apply(test_this, args);
+        }, timeout * tests.timeout_multiplier));
+    }
+
+    Test.prototype.add_cleanup = function(callback) {
+        this.cleanup_callbacks.push(callback);
+    };
+
+    Test.prototype.force_timeout = function() {
+        this.set_status(this.TIMEOUT);
+        this.phase = this.phases.HAS_RESULT;
+    };
+
+    Test.prototype.set_timeout = function()
+    {
+        if (this.timeout_length !== null) {
+            var this_obj = this;
+            this.timeout_id = setTimeout(function()
+                                         {
+                                             this_obj.timeout();
+                                         }, this.timeout_length);
+        }
+    };
+
+    Test.prototype.set_status = function(status, message, stack)
+    {
+        this.status = status;
+        this.message = message;
+        this.stack = stack ? stack : null;
+    };
+
+    Test.prototype.timeout = function()
+    {
+        this.timeout_id = null;
+        this.set_status(this.TIMEOUT, "Test timed out");
+        this.phase = this.phases.HAS_RESULT;
+        this.done();
+    };
+
+    Test.prototype.done = function()
+    {
+        if (this.phase == this.phases.COMPLETE) {
+            return;
+        }
+
+        if (this.phase <= this.phases.STARTED) {
+            this.set_status(this.PASS, null);
+        }
+
+        this.phase = this.phases.COMPLETE;
+
+        clearTimeout(this.timeout_id);
+        tests.result(this);
+        this.cleanup();
+    };
+
+    Test.prototype.cleanup = function() {
+        forEach(this.cleanup_callbacks,
+                function(cleanup_callback) {
+                    cleanup_callback();
+                });
+    };
+
+    /*
+     * A RemoteTest object mirrors a Test object on a remote worker. The
+     * associated RemoteWorker updates the RemoteTest object in response to
+     * received events. In turn, the RemoteTest object replicates these events
+     * on the local document. This allows listeners (test result reporting
+     * etc..) to transparently handle local and remote events.
+     */
+    function RemoteTest(clone) {
+        var this_obj = this;
+        Object.keys(clone).forEach(
+                function(key) {
+                    this_obj[key] = clone[key];
+                });
+        this.index = null;
+        this.phase = this.phases.INITIAL;
+        this.update_state_from(clone);
+        tests.push(this);
+    }
+
+    RemoteTest.prototype.structured_clone = function() {
+        var clone = {};
+        Object.keys(this).forEach(
+                (function(key) {
+                    if (typeof(this[key]) === "object") {
+                        clone[key] = merge({}, this[key]);
+                    } else {
+                        clone[key] = this[key];
+                    }
+                }).bind(this));
+        clone.phases = merge({}, this.phases);
+        return clone;
+    };
+
+    RemoteTest.prototype.cleanup = function() {};
+    RemoteTest.prototype.phases = Test.prototype.phases;
+    RemoteTest.prototype.update_state_from = function(clone) {
+        this.status = clone.status;
+        this.message = clone.message;
+        this.stack = clone.stack;
+        if (this.phase === this.phases.INITIAL) {
+            this.phase = this.phases.STARTED;
+        }
+    };
+    RemoteTest.prototype.done = function() {
+        this.phase = this.phases.COMPLETE;
+    }
+
+    /*
+     * A RemoteWorker listens for test events from a worker. These events are
+     * then used to construct and maintain RemoteTest objects that mirror the
+     * tests running on the remote worker.
+     */
+    function RemoteWorker(worker) {
+        this.running = true;
+        this.tests = new Array();
+
+        var this_obj = this;
+        worker.onerror = function(error) { this_obj.worker_error(error); };
+
+        var message_port;
+
+        if (is_service_worker(worker)) {
+            if (window.MessageChannel) {
+                // The ServiceWorker's implicit MessagePort is currently not
+                // reliably accessible from the ServiceWorkerGlobalScope due to
+                // Blink setting MessageEvent.source to null for messages sent
+                // via ServiceWorker.postMessage(). Until that's resolved,
+                // create an explicit MessageChannel and pass one end to the
+                // worker.
+                var message_channel = new MessageChannel();
+                message_port = message_channel.port1;
+                message_port.start();
+                worker.postMessage({type: "connect"}, [message_channel.port2]);
+            } else {
+                // If MessageChannel is not available, then try the
+                // ServiceWorker.postMessage() approach using MessageEvent.source
+                // on the other end.
+                message_port = navigator.serviceWorker;
+                worker.postMessage({type: "connect"});
+            }
+        } else if (is_shared_worker(worker)) {
+            message_port = worker.port;
+        } else {
+            message_port = worker;
+        }
+
+        // Keeping a reference to the worker until worker_done() is seen
+        // prevents the Worker object and its MessageChannel from going away
+        // before all the messages are dispatched.
+        this.worker = worker;
+
+        message_port.onmessage =
+            function(message) {
+                if (this_obj.running && (message.data.type in this_obj.message_handlers)) {
+                    this_obj.message_handlers[message.data.type].call(this_obj, message.data);
+                }
+            };
+    }
+
+    RemoteWorker.prototype.worker_error = function(error) {
+        var message = error.message || String(error);
+        var filename = (error.filename ? " " + error.filename: "");
+        // FIXME: Display worker error states separately from main document
+        // error state.
+        this.worker_done({
+            status: {
+                status: tests.status.ERROR,
+                message: "Error in worker" + filename + ": " + message,
+                stack: error.stack
+            }
+        });
+        error.preventDefault();
+    };
+
+    RemoteWorker.prototype.test_state = function(data) {
+        var remote_test = this.tests[data.test.index];
+        if (!remote_test) {
+            remote_test = new RemoteTest(data.test);
+            this.tests[data.test.index] = remote_test;
+        }
+        remote_test.update_state_from(data.test);
+        tests.notify_test_state(remote_test);
+    };
+
+    RemoteWorker.prototype.test_done = function(data) {
+        var remote_test = this.tests[data.test.index];
+        remote_test.update_state_from(data.test);
+        remote_test.done();
+        tests.result(remote_test);
+    };
+
+    RemoteWorker.prototype.worker_done = function(data) {
+        if (tests.status.status === null &&
+            data.status.status !== data.status.OK) {
+            tests.status.status = data.status.status;
+            tests.status.message = data.status.message;
+            tests.status.stack = data.status.stack;
+        }
+        this.running = false;
+        this.worker = null;
+        if (tests.all_done()) {
+            tests.complete();
+        }
+    };
+
+    RemoteWorker.prototype.message_handlers = {
+        test_state: RemoteWorker.prototype.test_state,
+        result: RemoteWorker.prototype.test_done,
+        complete: RemoteWorker.prototype.worker_done
+    };
+
+    /*
+     * Harness
+     */
+
+    function TestsStatus()
+    {
+        this.status = null;
+        this.message = null;
+        this.stack = null;
+    }
+
+    TestsStatus.statuses = {
+        OK:0,
+        ERROR:1,
+        TIMEOUT:2
+    };
+
+    TestsStatus.prototype = merge({}, TestsStatus.statuses);
+
+    TestsStatus.prototype.structured_clone = function()
+    {
+        if (!this._structured_clone) {
+            var msg = this.message;
+            msg = msg ? String(msg) : msg;
+            this._structured_clone = merge({
+                status:this.status,
+                message:msg,
+                stack:this.stack
+            }, TestsStatus.statuses);
+        }
+        return this._structured_clone;
+    };
+
+    function Tests()
+    {
+        this.tests = [];
+        this.num_pending = 0;
+
+        this.phases = {
+            INITIAL:0,
+            SETUP:1,
+            HAVE_TESTS:2,
+            HAVE_RESULTS:3,
+            COMPLETE:4
+        };
+        this.phase = this.phases.INITIAL;
+
+        this.properties = {};
+
+        this.wait_for_finish = false;
+        this.processing_callbacks = false;
+
+        this.allow_uncaught_exception = false;
+
+        this.file_is_test = false;
+
+        this.timeout_multiplier = 1;
+        this.timeout_length = test_environment.test_timeout();
+        this.timeout_id = null;
+
+        this.start_callbacks = [];
+        this.test_state_callbacks = [];
+        this.test_done_callbacks = [];
+        this.all_done_callbacks = [];
+
+        this.pending_workers = [];
+
+        this.status = new TestsStatus();
+
+        var this_obj = this;
+
+        test_environment.add_on_loaded_callback(function() {
+            if (this_obj.all_done()) {
+                this_obj.complete();
+            }
+        });
+
+        this.set_timeout();
+    }
+
+    Tests.prototype.setup = function(func, properties)
+    {
+        if (this.phase >= this.phases.HAVE_RESULTS) {
+            return;
+        }
+
+        if (this.phase < this.phases.SETUP) {
+            this.phase = this.phases.SETUP;
+        }
+
+        this.properties = properties;
+
+        for (var p in properties) {
+            if (properties.hasOwnProperty(p)) {
+                var value = properties[p];
+                if (p == "allow_uncaught_exception") {
+                    this.allow_uncaught_exception = value;
+                } else if (p == "explicit_done" && value) {
+                    this.wait_for_finish = true;
+                } else if (p == "explicit_timeout" && value) {
+                    this.timeout_length = null;
+                    if (this.timeout_id)
+                    {
+                        clearTimeout(this.timeout_id);
+                    }
+                } else if (p == "timeout_multiplier") {
+                    this.timeout_multiplier = value;
+                }
+            }
+        }
+
+        if (func) {
+            try {
+                func();
+            } catch (e) {
+                this.status.status = this.status.ERROR;
+                this.status.message = String(e);
+                this.status.stack = e.stack ? e.stack : null;
+            }
+        }
+        this.set_timeout();
+    };
+
+    Tests.prototype.set_file_is_test = function() {
+        if (this.tests.length > 0) {
+            throw new Error("Tried to set file as test after creating a test");
+        }
+        this.wait_for_finish = true;
+        this.file_is_test = true;
+        // Create the test, which will add it to the list of tests
+        async_test();
+    };
+
+    Tests.prototype.set_timeout = function() {
+        var this_obj = this;
+        clearTimeout(this.timeout_id);
+        if (this.timeout_length !== null) {
+            this.timeout_id = setTimeout(function() {
+                                             this_obj.timeout();
+                                         }, this.timeout_length);
+        }
+    };
+
+    Tests.prototype.timeout = function() {
+        if (this.status.status === null) {
+            this.status.status = this.status.TIMEOUT;
+        }
+        this.complete();
+    };
+
+    Tests.prototype.end_wait = function()
+    {
+        this.wait_for_finish = false;
+        if (this.all_done()) {
+            this.complete();
+        }
+    };
+
+    Tests.prototype.push = function(test)
+    {
+        if (this.phase < this.phases.HAVE_TESTS) {
+            this.start();
+        }
+        this.num_pending++;
+        test.index = this.tests.push(test);
+        this.notify_test_state(test);
+    };
+
+    Tests.prototype.notify_test_state = function(test) {
+        var this_obj = this;
+        forEach(this.test_state_callbacks,
+                function(callback) {
+                    callback(test, this_obj);
+                });
+    };
+
+    Tests.prototype.all_done = function() {
+        return (this.tests.length > 0 && test_environment.all_loaded &&
+                this.num_pending === 0 && !this.wait_for_finish &&
+                !this.processing_callbacks &&
+                !this.pending_workers.some(function(w) { return w.running; }));
+    };
+
+    Tests.prototype.start = function() {
+        this.phase = this.phases.HAVE_TESTS;
+        this.notify_start();
+    };
+
+    Tests.prototype.notify_start = function() {
+        var this_obj = this;
+        forEach (this.start_callbacks,
+                 function(callback)
+                 {
+                     callback(this_obj.properties);
+                 });
+    };
+
+    Tests.prototype.result = function(test)
+    {
+        if (this.phase > this.phases.HAVE_RESULTS) {
+            return;
+        }
+        this.phase = this.phases.HAVE_RESULTS;
+        this.num_pending--;
+        this.notify_result(test);
+    };
+
+    Tests.prototype.notify_result = function(test) {
+        var this_obj = this;
+        this.processing_callbacks = true;
+        forEach(this.test_done_callbacks,
+                function(callback)
+                {
+                    callback(test, this_obj);
+                });
+        this.processing_callbacks = false;
+        if (this_obj.all_done()) {
+            this_obj.complete();
+        }
+    };
+
+    Tests.prototype.complete = function() {
+        if (this.phase === this.phases.COMPLETE) {
+            return;
+        }
+        this.phase = this.phases.COMPLETE;
+        var this_obj = this;
+        this.tests.forEach(
+            function(x)
+            {
+                if (x.phase < x.phases.COMPLETE) {
+                    this_obj.notify_result(x);
+                    x.cleanup();
+                    x.phase = x.phases.COMPLETE;
+                }
+            }
+        );
+        this.notify_complete();
+    };
+
+    Tests.prototype.notify_complete = function() {
+        var this_obj = this;
+        if (this.status.status === null) {
+            this.status.status = this.status.OK;
+        }
+
+        forEach (this.all_done_callbacks,
+                 function(callback)
+                 {
+                     callback(this_obj.tests, this_obj.status);
+                 });
+    };
+
+    Tests.prototype.fetch_tests_from_worker = function(worker) {
+        if (this.phase >= this.phases.COMPLETE) {
+            return;
+        }
+
+        this.pending_workers.push(new RemoteWorker(worker));
+    };
+
+    function fetch_tests_from_worker(port) {
+        tests.fetch_tests_from_worker(port);
+    }
+    expose(fetch_tests_from_worker, 'fetch_tests_from_worker');
+
+    function timeout() {
+        if (tests.timeout_length === null) {
+            tests.timeout();
+        }
+    }
+    expose(timeout, 'timeout');
+
+    function add_start_callback(callback) {
+        tests.start_callbacks.push(callback);
+    }
+
+    function add_test_state_callback(callback) {
+        tests.test_state_callbacks.push(callback);
+    }
+
+    function add_result_callback(callback) {
+        tests.test_done_callbacks.push(callback);
+    }
+
+    function add_completion_callback(callback) {
+        tests.all_done_callbacks.push(callback);
+    }
+
+    expose(add_start_callback, 'add_start_callback');
+    expose(add_test_state_callback, 'add_test_state_callback');
+    expose(add_result_callback, 'add_result_callback');
+    expose(add_completion_callback, 'add_completion_callback');
+
+    function remove(array, item) {
+        var index = array.indexOf(item);
+        if (index > -1) {
+            array.splice(index, 1);
+        }
+    }
+
+    function remove_start_callback(callback) {
+        remove(tests.start_callbacks, callback);
+    }
+
+    function remove_test_state_callback(callback) {
+        remove(tests.test_state_callbacks, callback);
+    }
+
+    function remove_result_callback(callback) {
+        remove(tests.test_done_callbacks, callback);
+    }
+
+    function remove_completion_callback(callback) {
+       remove(tests.all_done_callbacks, callback);
+    }
+
+    /*
+     * Output listener
+    */
+
+    function Output() {
+        this.output_document = document;
+        this.output_node = null;
+        this.enabled = settings.output;
+        this.phase = this.INITIAL;
+    }
+
+    Output.prototype.INITIAL = 0;
+    Output.prototype.STARTED = 1;
+    Output.prototype.HAVE_RESULTS = 2;
+    Output.prototype.COMPLETE = 3;
+
+    Output.prototype.setup = function(properties) {
+        if (this.phase > this.INITIAL) {
+            return;
+        }
+
+        //If output is disabled in testharnessreport.js the test shouldn't be
+        //able to override that
+        this.enabled = this.enabled && (properties.hasOwnProperty("output") ?
+                                        properties.output : settings.output);
+    };
+
+    Output.prototype.init = function(properties) {
+        if (this.phase >= this.STARTED) {
+            return;
+        }
+        if (properties.output_document) {
+            this.output_document = properties.output_document;
+        } else {
+            this.output_document = document;
+        }
+        this.phase = this.STARTED;
+    };
+
+    Output.prototype.resolve_log = function() {
+        var output_document;
+        if (typeof this.output_document === "function") {
+            output_document = this.output_document.apply(undefined);
+        } else {
+            output_document = this.output_document;
+        }
+        if (!output_document) {
+            return;
+        }
+        var node = output_document.getElementById("log");
+        if (!node) {
+            if (!document.body || document.readyState == "loading") {
+                return;
+            }
+            node = output_document.createElement("div");
+            node.id = "log";
+            output_document.body.appendChild(node);
+        }
+        this.output_document = output_document;
+        this.output_node = node;
+    };
+
+    Output.prototype.show_status = function() {
+        if (this.phase < this.STARTED) {
+            this.init();
+        }
+        if (!this.enabled) {
+            return;
+        }
+        if (this.phase < this.HAVE_RESULTS) {
+            this.resolve_log();
+            this.phase = this.HAVE_RESULTS;
+        }
+        var done_count = tests.tests.length - tests.num_pending;
+        if (this.output_node) {
+            if (done_count < 100 ||
+                (done_count < 1000 && done_count % 100 === 0) ||
+                done_count % 1000 === 0) {
+                this.output_node.textContent = "Running, " +
+                    done_count + " complete, " +
+                    tests.num_pending + " remain";
+            }
+        }
+    };
+
+    Output.prototype.show_results = function (tests, harness_status) {
+        if (this.phase >= this.COMPLETE) {
+            return;
+        }
+        if (!this.enabled) {
+            return;
+        }
+        if (!this.output_node) {
+            this.resolve_log();
+        }
+        this.phase = this.COMPLETE;
+
+        var log = this.output_node;
+        if (!log) {
+            return;
+        }
+        var output_document = this.output_document;
+
+        while (log.lastChild) {
+            log.removeChild(log.lastChild);
+        }
+
+        var harness_url = get_harness_url();
+        if (harness_url !== null) {
+            var stylesheet = output_document.createElementNS(xhtml_ns, "link");
+            stylesheet.setAttribute("rel", "stylesheet");
+            stylesheet.setAttribute("href", harness_url + "testharness.css");
+            var heads = output_document.getElementsByTagName("head");
+            if (heads.length) {
+                heads[0].appendChild(stylesheet);
+            }
+        }
+
+        var status_text_harness = {};
+        status_text_harness[harness_status.OK] = "OK";
+        status_text_harness[harness_status.ERROR] = "Error";
+        status_text_harness[harness_status.TIMEOUT] = "Timeout";
+
+        var status_text = {};
+        status_text[Test.prototype.PASS] = "Pass";
+        status_text[Test.prototype.FAIL] = "Fail";
+        status_text[Test.prototype.TIMEOUT] = "Timeout";
+        status_text[Test.prototype.NOTRUN] = "Not Run";
+
+        var status_number = {};
+        forEach(tests,
+                function(test) {
+                    var status = status_text[test.status];
+                    if (status_number.hasOwnProperty(status)) {
+                        status_number[status] += 1;
+                    } else {
+                        status_number[status] = 1;
+                    }
+                });
+
+        function status_class(status)
+        {
+            return status.replace(/\s/g, '').toLowerCase();
+        }
+
+        var summary_template = ["section", {"id":"summary"},
+                                ["h2", {}, "Summary"],
+                                function()
+                                {
+
+                                    var status = status_text_harness[harness_status.status];
+                                    var rv = [["section", {},
+                                               ["p", {},
+                                                "Harness status: ",
+                                                ["span", {"class":status_class(status)},
+                                                 status
+                                                ],
+                                               ]
+                                              ]];
+
+                                    if (harness_status.status === harness_status.ERROR) {
+                                        rv[0].push(["pre", {}, harness_status.message]);
+                                        if (harness_status.stack) {
+                                            rv[0].push(["pre", {}, harness_status.stack]);
+                                        }
+                                    }
+                                    return rv;
+                                },
+                                ["p", {}, "Found ${num_tests} tests"],
+                                function() {
+                                    var rv = [["div", {}]];
+                                    var i = 0;
+                                    while (status_text.hasOwnProperty(i)) {
+                                        if (status_number.hasOwnProperty(status_text[i])) {
+                                            var status = status_text[i];
+                                            rv[0].push(["div", {"class":status_class(status)},
+                                                        ["label", {},
+                                                         ["input", {type:"checkbox", checked:"checked"}],
+                                                         status_number[status] + " " + status]]);
+                                        }
+                                        i++;
+                                    }
+                                    return rv;
+                                },
+                               ];
+
+        log.appendChild(render(summary_template, {num_tests:tests.length}, output_document));
+
+        forEach(output_document.querySelectorAll("section#summary label"),
+                function(element)
+                {
+                    on_event(element, "click",
+                             function(e)
+                             {
+                                 if (output_document.getElementById("results") === null) {
+                                     e.preventDefault();
+                                     return;
+                                 }
+                                 var result_class = element.parentNode.getAttribute("class");
+                                 var style_element = output_document.querySelector("style#hide-" + result_class);
+                                 var input_element = element.querySelector("input");
+                                 if (!style_element && !input_element.checked) {
+                                     style_element = output_document.createElementNS(xhtml_ns, "style");
+                                     style_element.id = "hide-" + result_class;
+                                     style_element.textContent = "table#results > tbody > tr."+result_class+"{display:none}";
+                                     output_document.body.appendChild(style_element);
+                                 } else if (style_element && input_element.checked) {
+                                     style_element.parentNode.removeChild(style_element);
+                                 }
+                             });
+                });
+
+        // This use of innerHTML plus manual escaping is not recommended in
+        // general, but is necessary here for performance.  Using textContent
+        // on each individual <td> adds tens of seconds of execution time for
+        // large test suites (tens of thousands of tests).
+        function escape_html(s)
+        {
+            return s.replace(/\&/g, "&amp;")
+                .replace(/</g, "&lt;")
+                .replace(/"/g, "&quot;")
+                .replace(/'/g, "&#39;");
+        }
+
+        function has_assertions()
+        {
+            for (var i = 0; i < tests.length; i++) {
+                if (tests[i].properties.hasOwnProperty("assert")) {
+                    return true;
+                }
+            }
+            return false;
+        }
+
+        function get_assertion(test)
+        {
+            if (test.properties.hasOwnProperty("assert")) {
+                if (Array.isArray(test.properties.assert)) {
+                    return test.properties.assert.join(' ');
+                }
+                return test.properties.assert;
+            }
+            return '';
+        }
+
+        log.appendChild(document.createElementNS(xhtml_ns, "section"));
+        var assertions = has_assertions();
+        var html = "<h2>Details</h2><table id='results' " + (assertions ? "class='assertions'" : "" ) + ">" +
+            "<thead><tr><th>Result</th><th>Test Name</th>" +
+            (assertions ? "<th>Assertion</th>" : "") +
+            "<th>Message</th></tr></thead>" +
+            "<tbody>";
+        for (var i = 0; i < tests.length; i++) {
+            html += '<tr class="' +
+                escape_html(status_class(status_text[tests[i].status])) +
+                '"><td>' +
+                escape_html(status_text[tests[i].status]) +
+                "</td><td>" +
+                escape_html(tests[i].name) +
+                "</td><td>" +
+                (assertions ? escape_html(get_assertion(tests[i])) + "</td><td>" : "") +
+                escape_html(tests[i].message ? tests[i].message : " ") +
+                (tests[i].stack ? "<pre>" +
+                 escape_html(tests[i].stack) +
+                 "</pre>": "") +
+                "</td></tr>";
+        }
+        html += "</tbody></table>";
+        try {
+            log.lastChild.innerHTML = html;
+        } catch (e) {
+            log.appendChild(document.createElementNS(xhtml_ns, "p"))
+               .textContent = "Setting innerHTML for the log threw an exception.";
+            log.appendChild(document.createElementNS(xhtml_ns, "pre"))
+               .textContent = html;
+        }
+    };
+
+    /*
+     * Template code
+     *
+     * A template is just a javascript structure. An element is represented as:
+     *
+     * [tag_name, {attr_name:attr_value}, child1, child2]
+     *
+     * the children can either be strings (which act like text nodes), other templates or
+     * functions (see below)
+     *
+     * A text node is represented as
+     *
+     * ["{text}", value]
+     *
+     * String values have a simple substitution syntax; ${foo} represents a variable foo.
+     *
+     * It is possible to embed logic in templates by using a function in a place where a
+     * node would usually go. The function must either return part of a template or null.
+     *
+     * In cases where a set of nodes are required as output rather than a single node
+     * with children it is possible to just use a list
+     * [node1, node2, node3]
+     *
+     * Usage:
+     *
+     * render(template, substitutions) - take a template and an object mapping
+     * variable names to parameters and return either a DOM node or a list of DOM nodes
+     *
+     * substitute(template, substitutions) - take a template and variable mapping object,
+     * make the variable substitutions and return the substituted template
+     *
+     */
+
+    function is_single_node(template)
+    {
+        return typeof template[0] === "string";
+    }
+
+    function substitute(template, substitutions)
+    {
+        if (typeof template === "function") {
+            var replacement = template(substitutions);
+            if (!replacement) {
+                return null;
+            }
+
+            return substitute(replacement, substitutions);
+        }
+
+        if (is_single_node(template)) {
+            return substitute_single(template, substitutions);
+        }
+
+        return filter(map(template, function(x) {
+                              return substitute(x, substitutions);
+                          }), function(x) {return x !== null;});
+    }
+
+    function substitute_single(template, substitutions)
+    {
+        var substitution_re = /\$\{([^ }]*)\}/g;
+
+        function do_substitution(input) {
+            var components = input.split(substitution_re);
+            var rv = [];
+            for (var i = 0; i < components.length; i += 2) {
+                rv.push(components[i]);
+                if (components[i + 1]) {
+                    rv.push(String(substitutions[components[i + 1]]));
+                }
+            }
+            return rv;
+        }
+
+        function substitute_attrs(attrs, rv)
+        {
+            rv[1] = {};
+            for (var name in template[1]) {
+                if (attrs.hasOwnProperty(name)) {
+                    var new_name = do_substitution(name).join("");
+                    var new_value = do_substitution(attrs[name]).join("");
+                    rv[1][new_name] = new_value;
+                }
+            }
+        }
+
+        function substitute_children(children, rv)
+        {
+            for (var i = 0; i < children.length; i++) {
+                if (children[i] instanceof Object) {
+                    var replacement = substitute(children[i], substitutions);
+                    if (replacement !== null) {
+                        if (is_single_node(replacement)) {
+                            rv.push(replacement);
+                        } else {
+                            extend(rv, replacement);
+                        }
+                    }
+                } else {
+                    extend(rv, do_substitution(String(children[i])));
+                }
+            }
+            return rv;
+        }
+
+        var rv = [];
+        rv.push(do_substitution(String(template[0])).join(""));
+
+        if (template[0] === "{text}") {
+            substitute_children(template.slice(1), rv);
+        } else {
+            substitute_attrs(template[1], rv);
+            substitute_children(template.slice(2), rv);
+        }
+
+        return rv;
+    }
+
+    function make_dom_single(template, doc)
+    {
+        var output_document = doc || document;
+        var element;
+        if (template[0] === "{text}") {
+            element = output_document.createTextNode("");
+            for (var i = 1; i < template.length; i++) {
+                element.data += template[i];
+            }
+        } else {
+            element = output_document.createElementNS(xhtml_ns, template[0]);
+            for (var name in template[1]) {
+                if (template[1].hasOwnProperty(name)) {
+                    element.setAttribute(name, template[1][name]);
+                }
+            }
+            for (var i = 2; i < template.length; i++) {
+                if (template[i] instanceof Object) {
+                    var sub_element = make_dom(template[i]);
+                    element.appendChild(sub_element);
+                } else {
+                    var text_node = output_document.createTextNode(template[i]);
+                    element.appendChild(text_node);
+                }
+            }
+        }
+
+        return element;
+    }
+
+    function make_dom(template, substitutions, output_document)
+    {
+        if (is_single_node(template)) {
+            return make_dom_single(template, output_document);
+        }
+
+        return map(template, function(x) {
+                       return make_dom_single(x, output_document);
+                   });
+    }
+
+    function render(template, substitutions, output_document)
+    {
+        return make_dom(substitute(template, substitutions), output_document);
+    }
+
+    /*
+     * Utility funcions
+     */
+    function assert(expected_true, function_name, description, error, substitutions)
+    {
+        if (tests.tests.length === 0) {
+            tests.set_file_is_test();
+        }
+        if (expected_true !== true) {
+            var msg = make_message(function_name, description,
+                                   error, substitutions);
+            throw new AssertionError(msg);
+        }
+    }
+
+    function AssertionError(message)
+    {
+        this.message = message;
+        this.stack = this.get_stack();
+    }
+
+    AssertionError.prototype = Object.create(Error.prototype);
+
+    AssertionError.prototype.get_stack = function() {
+        var stack = new Error().stack;
+        // IE11 does not initialize 'Error.stack' until the object is thrown.
+        if (!stack) {
+            try {
+                throw new Error();
+            } catch (e) {
+                stack = e.stack;
+            }
+        }
+
+        var lines = stack.split("\n");
+
+        // Create a pattern to match stack frames originating within testharness.js.  These include the
+        // script URL, followed by the line/col (e.g., '/resources/testharness.js:120:21').
+        var re = new RegExp((get_script_url() || "\\btestharness.js") + ":\\d+:\\d+");
+
+        // Some browsers include a preamble that specifies the type of the error object.  Skip this by
+        // advancing until we find the first stack frame originating from testharness.js.
+        var i = 0;
+        while (!re.test(lines[i]) && i < lines.length) {
+            i++;
+        }
+
+        // Then skip the top frames originating from testharness.js to begin the stack at the test code.
+        while (re.test(lines[i]) && i < lines.length) {
+            i++;
+        }
+
+        // Paranoid check that we didn't skip all frames.  If so, return the original stack unmodified.
+        if (i >= lines.length) {
+            return stack;
+        }
+
+        return lines.slice(i).join("\n");
+    }
+
+    function make_message(function_name, description, error, substitutions)
+    {
+        for (var p in substitutions) {
+            if (substitutions.hasOwnProperty(p)) {
+                substitutions[p] = format_value(substitutions[p]);
+            }
+        }
+        var node_form = substitute(["{text}", "${function_name}: ${description}" + error],
+                                   merge({function_name:function_name,
+                                          description:(description?description + " ":"")},
+                                          substitutions));
+        return node_form.slice(1).join("");
+    }
+
+    function filter(array, callable, thisObj) {
+        var rv = [];
+        for (var i = 0; i < array.length; i++) {
+            if (array.hasOwnProperty(i)) {
+                var pass = callable.call(thisObj, array[i], i, array);
+                if (pass) {
+                    rv.push(array[i]);
+                }
+            }
+        }
+        return rv;
+    }
+
+    function map(array, callable, thisObj)
+    {
+        var rv = [];
+        rv.length = array.length;
+        for (var i = 0; i < array.length; i++) {
+            if (array.hasOwnProperty(i)) {
+                rv[i] = callable.call(thisObj, array[i], i, array);
+            }
+        }
+        return rv;
+    }
+
+    function extend(array, items)
+    {
+        Array.prototype.push.apply(array, items);
+    }
+
+    function forEach(array, callback, thisObj)
+    {
+        for (var i = 0; i < array.length; i++) {
+            if (array.hasOwnProperty(i)) {
+                callback.call(thisObj, array[i], i, array);
+            }
+        }
+    }
+
+    function merge(a,b)
+    {
+        var rv = {};
+        var p;
+        for (p in a) {
+            rv[p] = a[p];
+        }
+        for (p in b) {
+            rv[p] = b[p];
+        }
+        return rv;
+    }
+
+    function expose(object, name)
+    {
+        var components = name.split(".");
+        var target = test_environment.global_scope();
+        for (var i = 0; i < components.length - 1; i++) {
+            if (!(components[i] in target)) {
+                target[components[i]] = {};
+            }
+            target = target[components[i]];
+        }
+        target[components[components.length - 1]] = object;
+    }
+
+    function is_same_origin(w) {
+        try {
+            'random_prop' in w;
+            return true;
+        } catch (e) {
+            return false;
+        }
+    }
+
+    /** Returns the 'src' URL of the first <script> tag in the page to include the file 'testharness.js'. */
+    function get_script_url()
+    {
+        if (!('document' in self)) {
+            return undefined;
+        }
+
+        var scripts = document.getElementsByTagName("script");
+        for (var i = 0; i < scripts.length; i++) {
+            var src;
+            if (scripts[i].src) {
+                src = scripts[i].src;
+            } else if (scripts[i].href) {
+                //SVG case
+                src = scripts[i].href.baseVal;
+            }
+
+            var matches = src && src.match(/^(.*\/|)testharness\.js$/);
+            if (matches) {
+                return src;
+            }
+        }
+        return undefined;
+    }
+
+    /** Returns the URL path at which the files for testharness.js are assumed to reside (e.g., '/resources/').
+        The path is derived from inspecting the 'src' of the <script> tag that included 'testharness.js'. */
+    function get_harness_url()
+    {
+        var script_url = get_script_url();
+
+        // Exclude the 'testharness.js' file from the returned path, but '+ 1' to include the trailing slash.
+        return script_url ? script_url.slice(0, script_url.lastIndexOf('/') + 1) : undefined;
+    }
+
+    function supports_post_message(w)
+    {
+        var supports;
+        var type;
+        // Given IE implements postMessage across nested iframes but not across
+        // windows or tabs, you can't infer cross-origin communication from the presence
+        // of postMessage on the current window object only.
+        //
+        // Touching the postMessage prop on a window can throw if the window is
+        // not from the same origin AND post message is not supported in that
+        // browser. So just doing an existence test here won't do, you also need
+        // to wrap it in a try..cacth block.
+        try {
+            type = typeof w.postMessage;
+            if (type === "function") {
+                supports = true;
+            }
+
+            // IE8 supports postMessage, but implements it as a host object which
+            // returns "object" as its `typeof`.
+            else if (type === "object") {
+                supports = true;
+            }
+
+            // This is the case where postMessage isn't supported AND accessing a
+            // window property across origins does NOT throw (e.g. old Safari browser).
+            else {
+                supports = false;
+            }
+        } catch (e) {
+            // This is the case where postMessage isn't supported AND accessing a
+            // window property across origins throws (e.g. old Firefox browser).
+            supports = false;
+        }
+        return supports;
+    }
+
+    /**
+     * Setup globals
+     */
+
+    var tests = new Tests();
+
+    addEventListener("error", function(e) {
+        if (tests.file_is_test) {
+            var test = tests.tests[0];
+            if (test.phase >= test.phases.HAS_RESULT) {
+                return;
+            }
+            test.set_status(test.FAIL, e.message, e.stack);
+            test.phase = test.phases.HAS_RESULT;
+            test.done();
+            done();
+        } else if (!tests.allow_uncaught_exception) {
+            tests.status.status = tests.status.ERROR;
+            tests.status.message = e.message;
+            tests.status.stack = e.stack;
+        }
+    });
+
+    test_environment.on_tests_ready();
+
+})();
+// vim: set expandtab shiftwidth=4 tabstop=4:
diff --git a/dom/imptests/testharnessreport.js b/dom/imptests/testharnessreport.js
new file mode 100644
index 0000000000..6bc7ec3ab6
--- /dev/null
+++ b/dom/imptests/testharnessreport.js
@@ -0,0 +1,312 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+var W3CTest = {
+  /**
+   * Dictionary mapping a test URL to either the string "all", which means that
+   * all tests in this file are expected to fail, or a dictionary mapping test
+   * names to either the boolean |true|, or the string "debug". The former
+   * means that this test is expected to fail in all builds, and the latter
+   * that it is only expected to fail in debug builds.
+   */
+  "expectedFailures": {},
+
+  /**
+   * If set to true, we will dump the test failures to the console.
+   */
+  "dumpFailures": false,
+
+  /**
+   * If dumpFailures is true, this holds a structure like necessary for
+   * expectedFailures, for ease of updating the expectations.
+   */
+  "failures": {},
+
+  /**
+   * List of test results, needed by TestRunner to update the UI.
+   */
+  "tests": [],
+
+  /**
+   * Number of unlogged passes, to stop buildbot from truncating the log.
+   * We will print a message every MAX_COLLAPSED_MESSAGES passes.
+   */
+  "collapsedMessages": 0,
+  "MAX_COLLAPSED_MESSAGES": 100,
+
+  /**
+   * Reference to the TestRunner object in the parent frame.
+   */
+  "runner": parent === this ? null : parent.TestRunner || parent.wrappedJSObject.TestRunner,
+
+  /**
+   * Prefixes for the error logging. Indexed first by int(todo) and second by
+   * int(result). Also contains the test's status, and expected status.
+   */
+  "prefixes": [
+    [
+      {status: 'FAIL', expected: 'PASS', message: "TEST-UNEXPECTED-FAIL"},
+      {status: 'PASS', expected: 'PASS', message: "TEST-PASS"}
+    ],
+    [
+      {status: 'FAIL', expected: 'FAIL', message: "TEST-KNOWN-FAIL"},
+      {status: 'PASS', expected: 'FAIL', message: "TEST-UNEXPECTED-PASS"}
+    ]
+  ],
+
+  /**
+   * Prefix of the path to parent of the the failures directory.
+   */
+  "pathprefix": "/tests/dom/imptests/",
+
+  /**
+   * Returns the URL of the current test, relative to the root W3C tests
+   * directory. Used as a key into the expectedFailures dictionary.
+   */
+  "getPath": function() {
+    var url = this.getURL();
+    if (!url.startsWith(this.pathprefix)) {
+      return "";
+    }
+    return url.substring(this.pathprefix.length);
+  },
+
+  /**
+   * Returns the root-relative URL of the current test.
+   */
+  "getURL": function() {
+    return this.runner ? this.runner.currentTestURL : location.pathname;
+  },
+
+  /**
+   * Report the results in the tests array.
+   */
+  "reportResults": function() {
+    var element = function element(aLocalName) {
+      var xhtmlNS = "http://www.w3.org/1999/xhtml";
+      return document.createElementNS(xhtmlNS, aLocalName);
+    };
+
+    var stylesheet = element("link");
+    stylesheet.setAttribute("rel", "stylesheet");
+    stylesheet.setAttribute("href", "/resources/testharness.css");
+    var heads = document.getElementsByTagName("head");
+    if (heads.length) {
+      heads[0].appendChild(stylesheet);
+    }
+
+    var log = document.getElementById("log");
+    if (!log) {
+      return;
+    }
+    var section = log.appendChild(element("section"));
+    section.id = "summary";
+    section.appendChild(element("h2")).textContent = "Details";
+
+    var table = section.appendChild(element("table"));
+    table.id = "results";
+
+    var tr = table.appendChild(element("thead")).appendChild(element("tr"));
+    for (var header of ["Result", "Test Name", "Message"]) {
+      tr.appendChild(element("th")).textContent = header;
+    }
+    var statuses = [
+      ["Unexpected Fail", "Pass"],
+      ["Known Fail", "Unexpected Pass"]
+    ];
+    var tbody = table.appendChild(element("tbody"));
+    for (var test of this.tests) {
+      tr = tbody.appendChild(element("tr"));
+      tr.className = (test.result === !test.todo ? "pass" : "fail");
+      tr.appendChild(element("td")).textContent =
+        statuses[+test.todo][+test.result];
+      tr.appendChild(element("td")).textContent = test.name;
+      tr.appendChild(element("td")).textContent = test.message;
+    }
+  },
+
+  /**
+   * Returns a printable message based on aTest's 'name' and 'message'
+   * properties.
+   */
+  "formatTestMessage": function(aTest) {
+    return aTest.name + (aTest.message ? ": " + aTest.message : "");
+  },
+
+  /**
+   * Lets the test runner know about a test result.
+   */
+  "_log": function(test) {
+    var url = this.getURL();
+    var message = this.formatTestMessage(test);
+    var result = this.prefixes[+test.todo][+test.result];
+
+    if (this.runner) {
+      this.runner.structuredLogger.testStatus(url,
+                                              test.name,
+                                              result.status,
+                                              result.expected,
+                                              message);
+    } else {
+      var msg = result.message + " | ";
+      if (url) {
+        msg += url;
+      }
+      msg += " | " + this.formatTestMessage(test);
+      dump(msg + "\n");
+    }
+  },
+
+  /**
+   * Logs a message about collapsed messages (if any), and resets the counter.
+   */
+  "_logCollapsedMessages": function() {
+    if (this.collapsedMessages) {
+      this._log({
+        "name": document.title,
+        "result": true,
+        "todo": false,
+        "message": "Elided " + this.collapsedMessages + " passes or known failures."
+      });
+    }
+    this.collapsedMessages = 0;
+  },
+
+  /**
+   * Maybe logs a result, eliding up to MAX_COLLAPSED_MESSAGES consecutive
+   * passes.
+   */
+  "_maybeLog": function(test) {
+    var success = (test.result === !test.todo);
+    if (success && ++this.collapsedMessages < this.MAX_COLLAPSED_MESSAGES) {
+      return;
+    }
+    this._logCollapsedMessages();
+    this._log(test);
+  },
+
+  /**
+   * Reports a test result. The argument is an object with the following
+   * properties:
+   *
+   * o message (string): message to be reported
+   * o result (boolean): whether this test failed
+   * o todo (boolean): whether this test is expected to fail
+   */
+  "report": function(test) {
+    this.tests.push(test);
+    this._maybeLog(test);
+  },
+
+  /**
+   * Returns true if this test is expected to fail, and false otherwise.
+   */
+  "_todo": function(test) {
+    if (this.expectedFailures === "all") {
+      return true;
+    }
+    var value = this.expectedFailures[test.name];
+    return value === true || (value === "debug" && !!SpecialPowers.isDebugBuild);
+  },
+
+  /**
+   * Callback function for testharness.js. Called when one test in a file
+   * finishes.
+   */
+  "result": function(test) {
+    var url = this.getPath();
+    this.report({
+      "name": test.name,
+      "message": test.message || "",
+      "result": test.status === test.PASS,
+      "todo": this._todo(test)
+    });
+    if (this.dumpFailures && test.status !== test.PASS) {
+      this.failures[test.name] = true;
+    }
+  },
+
+  /**
+   * Callback function for testharness.js. Called when the entire test file
+   * finishes.
+   */
+  "finish": function(tests, status) {
+    var url = this.getPath();
+    this.report({
+      "name": "Finished test",
+      "message": "Status: " + status.status,
+      "result": status.status === status.OK,
+      "todo":
+        url in this.expectedFailures &&
+        this.expectedFailures[url] === "error"
+    });
+
+    this._logCollapsedMessages();
+
+    if (this.dumpFailures) {
+      dump("@@@ @@@ Failures\n");
+      dump(url + "@@@" + JSON.stringify(this.failures) + "\n");
+    }
+    if (this.runner) {
+      this.runner.testFinished(this.tests.map(function(aTest) {
+        return {
+          "message": this.formatTestMessage(aTest),
+          "result": aTest.result,
+          "todo": aTest.todo
+        };
+      }, this));
+    } else {
+      this.reportResults();
+    }
+  },
+
+  /**
+   * Log an unexpected failure. Intended to be used from harness code, not
+   * from tests.
+   */
+  "logFailure": function(aTestName, aMessage) {
+    this.report({
+      "name": aTestName,
+      "message": aMessage,
+      "result": false,
+      "todo": false
+    });
+  },
+
+  /**
+   * Timeout the current test. Intended to be used from harness code, not
+   * from tests.
+   */
+  "timeout": function() {
+    this.logFailure("Timeout", "Test runner timed us out.");
+    timeout();
+  }
+};
+(function() {
+  try {
+    var path = W3CTest.getPath();
+    if (path) {
+      // Get expected fails.  If there aren't any, there will be a 404, which is
+      // fine.  Anything else is unexpected.
+      var url = W3CTest.pathprefix + "failures/" + path + ".json";
+      var request = new XMLHttpRequest();
+      request.open("GET", url, false);
+      request.send();
+      if (request.status === 200) {
+        W3CTest.expectedFailures = JSON.parse(request.responseText);
+      } else if (request.status !== 404) {
+        W3CTest.logFailure("Fetching failures file", "Request status was " + request.status);
+      }
+    }
+
+    add_result_callback(W3CTest.result.bind(W3CTest));
+    add_completion_callback(W3CTest.finish.bind(W3CTest));
+    setup({
+      "output": W3CTest.runner && !W3CTest.runner.getParameterInfo().closeWhenDone,
+      "explicit_timeout": true
+    });
+  } catch (e) {
+    W3CTest.logFailure("Harness setup", "Unexpected exception: " + e);
+  }
+})();
diff --git a/dom/imptests/updateTestharness.py b/dom/imptests/updateTestharness.py
new file mode 100644
index 0000000000..42deadcd4b
--- /dev/null
+++ b/dom/imptests/updateTestharness.py
@@ -0,0 +1,25 @@
+#!/usr/bin/env python
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this file,
+# You can obtain one at http://mozilla.org/MPL/2.0/.
+
+from __future__ import unicode_literals
+
+import subprocess
+
+repo = "https://github.com/w3c/testharness.js"
+dest = "resources-upstream"
+files = [{"f":"testharness.js"},
+         {"f":"testharness.css"},
+         {"f":"idlharness.js"},
+         {"d":"webidl2/lib/webidl2.js", "f":"WebIDLParser.js"}]
+
+subprocess.check_call(["git", "clone", repo, dest])
+subprocess.check_call(["git", "submodule", "init"], cwd=dest)
+subprocess.check_call(["git", "submodule", "update"], cwd=dest)
+for f in files:
+    path = f["d"] if "d" in f else f["f"]
+    subprocess.check_call(["cp", "%s/%s" % (dest, path), f["f"]])
+    subprocess.check_call(["hg", "add", f["f"]])
+subprocess.check_call(["rm", "-rf", dest])
+
diff --git a/dom/imptests/webapps.txt b/dom/imptests/webapps.txt
new file mode 100644
index 0000000000..25172d6997
--- /dev/null
+++ b/dom/imptests/webapps.txt
@@ -0,0 +1,3 @@
+hg|https://dvcs.w3.org/hg/webapps|webapps
+WebStorage/tests/submissions
+XMLHttpRequest/tests/submissions/Ms2ger
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/iframe/local_change_item_iframe.html b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/iframe/local_change_item_iframe.html
new file mode 100644
index 0000000000..19505615db
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/iframe/local_change_item_iframe.html
@@ -0,0 +1,18 @@
+<!DOCTYPE HTML>
+<html>
+ <body>
+	<script>
+		if (('localStorage' in window) && window.localStorage !== null){
+			try {
+				localStorage.setItem("name", "user1");
+				localStorage.setItem("name", "user2");
+			} catch (e) {
+				parent.fail("setItem method is failed.");
+			}
+			localStorage.clear();
+		} else {
+			parent.fail("localStorage is not supported.");
+		}	
+	</script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/iframe/local_security_iframe.html b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/iframe/local_security_iframe.html
new file mode 100644
index 0000000000..bc2fad3abf
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/iframe/local_security_iframe.html
@@ -0,0 +1,16 @@
+<!DOCTYPE HTML>

+<html>

+ <body>

+	<script>

+		if (('localStorage' in window) && window.localStorage != null){

+			try {

+				localStorage.setItem("Security", "false");

+				parent.localStorage.clear();

+			} catch (e) {

+				if(e.code == e['SECURITY_ERR'])

+					localStorage.setItem("Security", "true");

+			}

+		}

+	</script>

+ </body>

+</html>

diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/iframe/local_set_item_clear_iframe.html b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/iframe/local_set_item_clear_iframe.html
new file mode 100644
index 0000000000..74a6285a2a
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/iframe/local_set_item_clear_iframe.html
@@ -0,0 +1,17 @@
+<!DOCTYPE HTML>
+<html>
+ <body>
+	<script>
+		if (('localStorage' in window) && window.localStorage !== null){
+			try {
+				localStorage.setItem("name", "user1");
+			} catch (e) {
+				parent.fail("setItem method is failed.");
+			}
+			localStorage.clear();
+		} else {
+			parent.fail("localStorage is not supported.");
+		}	
+	</script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/iframe/local_set_item_iframe.html b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/iframe/local_set_item_iframe.html
new file mode 100644
index 0000000000..bacb3b2bb5
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/iframe/local_set_item_iframe.html
@@ -0,0 +1,16 @@
+<!DOCTYPE HTML>
+<html>
+ <body>
+	<script>
+		if (('localStorage' in window) && window.localStorage !== null){
+			try {
+				localStorage.setItem("name", "user1");
+			} catch (e) {
+				parent.fail("setItem method is failed.");
+			}
+		} else {
+			parent.fail("localStorage is not supported.");
+		}	
+	</script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/iframe/session_change_item_iframe.html b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/iframe/session_change_item_iframe.html
new file mode 100644
index 0000000000..6c86f58edd
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/iframe/session_change_item_iframe.html
@@ -0,0 +1,18 @@
+<!DOCTYPE HTML>
+<html>
+ <body>
+	<script>
+		if (('sessionStorage' in window) && window.sessionStorage !== null){
+			try {
+				sessionStorage.setItem("name", "user1");
+				sessionStorage.setItem("name", "user2");
+			} catch (e) {
+				parent.fail("setItem method is failed.");
+			}
+			sessionStorage.clear();
+		} else {
+			parent.fail("sessionStorage is not supported.");
+		}	
+	</script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/iframe/session_set_item_clear_iframe.html b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/iframe/session_set_item_clear_iframe.html
new file mode 100644
index 0000000000..a305f21a9c
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/iframe/session_set_item_clear_iframe.html
@@ -0,0 +1,17 @@
+<!DOCTYPE HTML>
+<html>
+ <body>
+ 	<script>
+ 		if (('sessionStorage' in window) && window.sessionStorage !== null){
+			try {
+				sessionStorage.setItem('name', 'user1');
+			} catch (e) {
+				parent.fail('setItem method is failed.');
+			}
+			sessionStorage.clear();
+		} else {
+			parent.fail('sessionStorage is not supported.');
+		}
+ 	</script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/iframe/session_set_item_iframe.html b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/iframe/session_set_item_iframe.html
new file mode 100644
index 0000000000..28d7059c39
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/iframe/session_set_item_iframe.html
@@ -0,0 +1,16 @@
+<!DOCTYPE HTML>
+<html>
+ <body>
+ 	<script>
+ 		if (('sessionStorage' in window) && window.sessionStorage !== null){
+			try {
+				sessionStorage.setItem('name', 'user1');
+			} catch (e) {
+				parent.fail('setItem method is failed.');
+			}
+		} else {
+			parent.fail('sessionStorage is not supported.');
+		}
+ 	</script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_event_constructor.html b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_event_constructor.html
new file mode 100644
index 0000000000..cc543c7fc9
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_event_constructor.html
@@ -0,0 +1,32 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+ </head>
+ <body>
+    <h1>event_session_Constructor</h1>
+    <div id="log"></div>
+    <script>
+        test(function() {
+            var t = async_test("storageeventinit test");
+            function onStorageEvent(event) {
+                t.step(function() {
+                    assert_equals(event.type, 'storage');
+                    assert_equals(event.key, null);
+                    assert_equals(event.oldValue, null);
+                    assert_equals(event.newValue, null);
+                    assert_equals(event.url, '');
+                    assert_equals(event.storageArea, null);
+                });
+                t.done();
+            }
+
+            window.addEventListener('storage', onStorageEvent, false);
+            var event = new StorageEvent('storage');
+            window.dispatchEvent(event);
+        });
+    </script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_event_local_key.html b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_event_local_key.html
new file mode 100644
index 0000000000..534f92f3b0
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_event_local_key.html
@@ -0,0 +1,42 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+  <script>
+      function fail(msg) {
+          t.step(function() {
+              assert_notreached(msg);
+          });
+          t.done();
+      }
+  </script>
+ </head>
+ <body>
+    <h1>event_local_key</h1>
+    <div id="log"></div>
+    <script>
+        test(function() {
+            localStorage.clear();
+            var t = async_test("key property test of local event");
+            var expected = ['name', null]
+            function onStorageEvent(event) {
+                t.step(function() {
+                    assert_equals(event.key, expected.shift());
+                });
+                if (!expected.length) {
+                    t.done();
+                }
+            }
+
+            window.addEventListener('storage', onStorageEvent, false);
+
+            var el = document.createElement("iframe");
+            el.setAttribute('id', 'ifrm');
+            el.setAttribute('src', 'iframe/local_set_item_clear_iframe.html');
+            document.body.appendChild(el);
+        });
+    </script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_event_local_newvalue.html b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_event_local_newvalue.html
new file mode 100644
index 0000000000..91a8c504cb
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_event_local_newvalue.html
@@ -0,0 +1,42 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+  <script>
+      function fail(msg) {
+          t.step(function() {
+              assert_notreached(msg);
+          });
+          t.done();
+      }
+  </script>
+ </head>
+ <body>
+    <h1>event_local_newValue</h1>
+    <div id="log"></div>
+    <script>
+        test(function() {
+            localStorage.clear();
+            var t = async_test("newValue property test of local event");
+            var expected = ['user1', 'user2', null]
+            function onStorageEvent(event) {
+                t.step(function() {
+                    assert_equals(event.newValue, expected.shift());
+                });
+                if (!expected.length) {
+                    t.done();
+                }
+            }
+
+            window.addEventListener('storage', onStorageEvent, false);
+
+            var el = document.createElement("iframe");
+            el.setAttribute('id', 'ifrm');
+            el.setAttribute('src', 'iframe/local_change_item_iframe.html');
+            document.body.appendChild(el);
+        });
+    </script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_event_local_oldvalue.html b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_event_local_oldvalue.html
new file mode 100644
index 0000000000..faf434001f
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_event_local_oldvalue.html
@@ -0,0 +1,42 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+  <script>
+      function fail(msg) {
+          t.step(function() {
+              assert_notreached(msg);
+          });
+          t.done();
+      }
+  </script>
+ </head>
+ <body>
+    <h1>event_local_oldValue</h1>
+    <div id="log"></div>
+    <script>
+        test(function() {
+            localStorage.clear();
+            var t = async_test("oldValue property test of local event");
+            var expected = [null, 'user1', null]
+            function onStorageEvent(event) {
+                t.step(function() {
+                    assert_equals(event.oldValue, expected.shift());
+                });
+                if (!expected.length) {
+                    t.done();
+                }
+            }
+
+            window.addEventListener('storage', onStorageEvent, false);
+
+            var el = document.createElement("iframe");
+            el.setAttribute('id', 'ifrm');
+            el.setAttribute('src', 'iframe/local_change_item_iframe.html');
+            document.body.appendChild(el);
+        });
+    </script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_event_local_storagearea.html b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_event_local_storagearea.html
new file mode 100644
index 0000000000..abe0113a82
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_event_local_storagearea.html
@@ -0,0 +1,43 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+  <script>
+      function fail(msg) {
+          t.step(function() {
+              assert_notreached(msg);
+          });
+          t.done();
+      }
+  </script>
+ </head>
+ <body>
+    <h1>event_local_storageArea</h1>
+    <div id="log"></div>
+    <script>
+        test(function() {
+            localStorage.clear();
+            var t = async_test("storageArea property test of local event");
+            function onStorageEvent(event) {
+                t.step(function() {
+                    assert_equals(event.storageArea.length, 1);
+                    var key = event.storageArea.key(0);
+                    var value = event.storageArea.getItem(key);
+                    assert_equals(key, "name");
+                    assert_equals(value, "user1");
+                });
+                t.done();
+            }
+
+            window.addEventListener('storage', onStorageEvent, false);
+
+            var el = document.createElement("iframe");
+            el.setAttribute('id', 'ifrm');
+            el.setAttribute('src', 'iframe/local_set_item_iframe.html');
+            document.body.appendChild(el);
+        });
+    </script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_event_local_storageeventinit.html b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_event_local_storageeventinit.html
new file mode 100644
index 0000000000..36e5a19e82
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_event_local_storageeventinit.html
@@ -0,0 +1,39 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+ </head>
+ <body>
+    <h1>event_local_StorageEventInit</h1>
+    <div id="log"></div>
+    <script>
+        test(function() {
+            var t = async_test("storageeventinit test");
+            function onStorageEvent(event) {
+                t.step(function() {
+                    assert_equals(event.key, 'key');
+                    assert_equals(event.oldValue, 'oldValue');
+                    assert_equals(event.newValue, 'newValue');
+                    assert_equals(event.url, window.location.href);
+                    assert_equals(event.storageArea, window.localStorage);
+                });
+                t.done();
+            }
+
+            window.addEventListener('storage', onStorageEvent, false);
+
+            var event = new StorageEvent('storage', {
+                key: 'key',
+                oldValue: 'oldValue',
+                newValue: 'newValue',
+                url: window.location.href,
+                storageArea: window.localStorage
+            });
+
+            window.dispatchEvent(event);
+        });
+    </script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_event_local_url.html b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_event_local_url.html
new file mode 100644
index 0000000000..8a4e6fb535
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_event_local_url.html
@@ -0,0 +1,47 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+  <script>
+      function fail(msg) {
+          t.step(function() {
+              assert_notreached(msg);
+          });
+          t.done();
+      }
+  </script>
+ </head>
+ <body>
+    <h1>event_local_url</h1>
+    <div id="log"></div>
+    <script>
+        test(function() {
+            localStorage.clear();
+            var t = async_test("url property test of local event");
+            function onStorageEvent(event) {
+                t.step(function() {
+                    var url = window.location.href;
+
+                    var pos = url.lastIndexOf("/");
+                    if (pos != -1) {
+                        url = url.substr(0, pos + 1);
+                        url = url + "iframe/local_set_item_iframe.html";
+                    }
+
+                   assert_equals(event.url, url);
+                });
+                t.done();
+            }
+
+            window.addEventListener('storage', onStorageEvent, false);
+
+            var el = document.createElement("iframe");
+            el.setAttribute('id', 'ifrm');
+            el.setAttribute('src', 'iframe/local_set_item_iframe.html');
+            document.body.appendChild(el);
+        });
+    </script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_event_session_key.html b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_event_session_key.html
new file mode 100644
index 0000000000..f976a67325
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_event_session_key.html
@@ -0,0 +1,42 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+  <script>
+      function fail(msg) {
+          t.step(function() {
+              assert_notreached(msg);
+          });
+          t.done();
+      }
+  </script>
+ </head>
+ <body>
+    <h1>event_session_key</h1>
+    <div id="log"></div>
+    <script>
+        test(function() {
+            sessionStorage.clear();
+            var t = async_test("key property test of session event");
+            var expected = ['name', null]
+            function onStorageEvent(event) {
+                t.step(function() {
+                    assert_equals(event.key, expected.shift());
+                });
+                if (!expected.length) {
+                    t.done();
+                }
+            }
+
+            window.addEventListener('storage', onStorageEvent, false);
+
+            var el = document.createElement("iframe");
+            el.setAttribute('id', 'ifrm');
+            el.setAttribute('src', 'iframe/session_set_item_clear_iframe.html');
+            document.body.appendChild(el);
+        });
+    </script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_event_session_newvalue.html b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_event_session_newvalue.html
new file mode 100644
index 0000000000..b2358d323a
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_event_session_newvalue.html
@@ -0,0 +1,42 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+  <script>
+      function fail(msg) {
+          t.step(function() {
+              assert_notreached(msg);
+          });
+          t.done();
+      }
+  </script>
+ </head>
+ <body>
+    <h1>event_session_newValue</h1>
+    <div id="log"></div>
+    <script>
+        test(function() {
+            sessionStorage.clear();
+            var t = async_test("newvalue property test of session event");
+            var expected = ['user1', 'user2', null]
+            function onStorageEvent(event) {
+                t.step(function() {
+                    assert_equals(event.newValue, expected.shift());
+                });
+                if (!expected.length) {
+                    t.done();
+                }
+            }
+
+            window.addEventListener('storage', onStorageEvent, false);
+
+            var el = document.createElement("iframe");
+            el.setAttribute('id', 'ifrm');
+            el.setAttribute('src', 'iframe/session_change_item_iframe.html');
+            document.body.appendChild(el);
+        });
+    </script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_event_session_oldvalue.html b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_event_session_oldvalue.html
new file mode 100644
index 0000000000..b81c30921a
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_event_session_oldvalue.html
@@ -0,0 +1,42 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+  <script>
+      function fail(msg) {
+          t.step(function() {
+              assert_notreached(msg);
+          });
+          t.done();
+      }
+  </script>
+ </head>
+ <body>
+    <h1>event_session_oldValue</h1>
+    <div id="log"></div>
+    <script>
+        test(function() {
+            sessionStorage.clear();
+            var t = async_test("oldvalue property test of session event");
+            var expected = [null, 'user1', null]
+            function onStorageEvent(event) {
+                t.step(function() {
+                    assert_equals(event.oldValue, expected.shift());
+                });
+                if (!expected.length) {
+                    t.done();
+                }
+            }
+
+            window.addEventListener('storage', onStorageEvent, false);
+
+            var el = document.createElement("iframe");
+            el.setAttribute('id', 'ifrm');
+            el.setAttribute('src', 'iframe/session_change_item_iframe.html');
+            document.body.appendChild(el);
+        });
+    </script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_event_session_storagearea.html b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_event_session_storagearea.html
new file mode 100644
index 0000000000..f478e6d7f8
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_event_session_storagearea.html
@@ -0,0 +1,43 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+  <script>
+      function fail(msg) {
+          t.step(function() {
+              assert_notreached(msg);
+          });
+          t.done();
+      }
+  </script>
+ </head>
+ <body>
+    <h1>event_session_storageArea</h1>
+    <div id="log"></div>
+    <script>
+        test(function() {
+            var t = async_test("storageArea property test of session event");
+            function onStorageEvent(event) {
+                t.step(function() {
+                    assert_equals(event.storageArea.length, 1);
+                    var key = event.storageArea.key(0);
+                    var value = event.storageArea.getItem(key);
+                    assert_equals(key, "name");
+                    assert_equals(value, "user1");
+                });
+                t.done();
+            }
+
+            window.addEventListener('storage', onStorageEvent, false);
+
+            var el = document.createElement("iframe");
+            el.setAttribute('id', 'ifrm');
+            el.setAttribute('src', 'iframe/session_set_item_iframe.html');
+            document.body.appendChild(el);
+        });
+    </script>
+
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_event_session_storageeventinit.html b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_event_session_storageeventinit.html
new file mode 100644
index 0000000000..a2d2c1a736
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_event_session_storageeventinit.html
@@ -0,0 +1,39 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+ </head>
+ <body>
+    <h1>event_session_StorageEventInit</h1>
+    <div id="log"></div>
+    <script>
+        test(function() {
+            var t = async_test("storageeventinit test");
+            function onStorageEvent(event) {
+                t.step(function() {
+                    assert_equals(event.key, 'key');
+                    assert_equals(event.oldValue, 'oldValue');
+                    assert_equals(event.newValue, 'newValue');
+                    assert_equals(event.url, window.location.href);
+                    assert_equals(event.storageArea, window.sessionStorage);
+                });
+                t.done();
+            }
+
+            window.addEventListener('storage', onStorageEvent, false);
+
+            var event = new StorageEvent('storage', {
+                key: 'key',
+                oldValue: 'oldValue',
+                newValue: 'newValue',
+                url: window.location.href,
+                storageArea: window.sessionStorage
+            });
+
+            window.dispatchEvent(event);
+        });
+    </script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_event_session_url.html b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_event_session_url.html
new file mode 100644
index 0000000000..c4842bedc8
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_event_session_url.html
@@ -0,0 +1,47 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+  <script>
+      function fail(msg) {
+          t.step(function() {
+              assert_notreached(msg);
+          });
+          t.done();
+      }
+  </script>
+ </head>
+ <body>
+    <h1>event_session_url</h1>
+    <div id="log"></div>
+    <script>
+        test(function() {
+            sessionStorage.clear();
+            var t = async_test("url property test of session event");
+            function onStorageEvent(event) {
+                t.step(function() {
+                    var url = window.location.href;
+
+                    var pos = url.lastIndexOf("/");
+                    if (pos != -1) {
+                        url = url.substr(0, pos + 1);
+                        url = url + "iframe/session_set_item_iframe.html";
+                    }
+
+                   assert_equals(event.url, url);
+                });
+                t.done();
+            }
+
+            window.addEventListener('storage', onStorageEvent, false);
+
+            var el = document.createElement("iframe");
+            el.setAttribute('id', 'ifrm');
+            el.setAttribute('src', 'iframe/session_set_item_iframe.html');
+            document.body.appendChild(el);
+        });
+    </script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_storage_local_clear.html b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_storage_local_clear.html
new file mode 100644
index 0000000000..39fd6d63a3
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_storage_local_clear.html
@@ -0,0 +1,25 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+ </head>
+ <body>
+    <h1>storage_local_clear</h1>
+    <div id="log"></div>
+    <script>
+        test(function() {
+            localStorage.clear();
+            localStorage.setItem("name", "user1");
+
+            assert_not_equals(localStorage.getItem("name"), null);
+            assert_equals(localStorage.length, 1);
+
+            localStorage.clear();
+            assert_equals(localStorage.getItem("name"), null, "localStorage.getItem('name')")
+            assert_equals(localStorage.length, 0, "localStorage.length")
+        });
+    </script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_storage_local_getitem.html b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_storage_local_getitem.html
new file mode 100644
index 0000000000..a6872ac946
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_storage_local_getitem.html
@@ -0,0 +1,23 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+ </head>
+ <body>
+    <h1>storage_local_getItem</h1>
+    <div id="log"></div>
+    <script>
+        test(function() {
+            localStorage.clear();
+            localStorage.setItem("name", "user1");
+            localStorage.setItem("age", "20");
+            test(function() {
+                assert_equals(localStorage.getItem("name"), "user1", "localStorage.getItem('name')")
+                assert_equals(localStorage.getItem("unknown"), null, "localStorage.getItem('unknown')")
+            }, "getItem method test")
+        });
+    </script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_storage_local_key.html b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_storage_local_key.html
new file mode 100644
index 0000000000..7ec0acba47
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_storage_local_key.html
@@ -0,0 +1,40 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+ </head>
+ <body>
+    <h1>storage_local_key</h1>
+    <div id="log"></div>
+    <script>
+        test(function() {
+            localStorage.clear();
+
+            localStorage.setItem("name", "user1");
+            localStorage.setItem("age", "20");
+            localStorage.setItem("a", "1");
+            localStorage.setItem("b", "2");
+
+            var keys = ["name", "age", "a", "b"];
+            function doTest(index) {
+                test(function() {
+                    var key = localStorage.key(index);
+                    assert_not_equals(key, null);
+                    assert_true(keys.indexOf(key) >= 0,
+                                "Unexpected key " + key + " found.");
+                }, "key(" + index + ") should return the right thing.");
+            }
+            for (var i = 0; i < keys.length; ++i) {
+                doTest(i);
+                doTest(i + 0x100000000);
+            }
+            test(function() {
+                assert_equals(localStorage.key(-1), null, "localStorage.key(-1)");
+                assert_equals(localStorage.key(4), null, "localStorage.key(4)");
+            }, "key() should return null for out-of-range arguments.");
+        });
+    </script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_storage_local_length.html b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_storage_local_length.html
new file mode 100644
index 0000000000..cf58cc7f4a
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_storage_local_length.html
@@ -0,0 +1,23 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+ </head>
+ <body>
+    <h1>storage_local_length</h1>
+    <div id="log"></div>
+    <script>
+        test(function() {
+            localStorage.clear();
+            assert_equals(localStorage.length, 0, "localStorage.length")
+
+            localStorage.setItem("name", "user1");
+            localStorage.setItem("age", "20");
+
+            assert_equals(localStorage.length, 2, "localStorage.length")
+        });
+    </script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_storage_local_removeitem.html b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_storage_local_removeitem.html
new file mode 100644
index 0000000000..67d336a006
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_storage_local_removeitem.html
@@ -0,0 +1,23 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+ </head>
+ <body>
+    <h1>storage_local_removeItem</h1>
+    <div id="log"></div>
+    <script>
+        test(function() {
+            localStorage.clear();
+            localStorage.setItem("name", "user1");
+            assert_equals(localStorage.getItem("name"), "user1");
+
+            localStorage.removeItem("name");
+            localStorage.removeItem("unknown");
+            assert_equals(localStorage.getItem("name"), null, "localStorage.getItem('name')")
+        });
+    </script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_storage_local_security.html b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_storage_local_security.html
new file mode 100644
index 0000000000..4833d8a175
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_storage_local_security.html
@@ -0,0 +1,32 @@
+<!DOCTYPE HTML>

+<html>

+ <head>

+  <title>Web Storage</title>

+  <script src="/resources/testharness.js"></script>

+  <script src="/resources/testharnessreport.js"></script>

+ </head>

+ <body>

+    <h1>storage_local_security</h1>

+	<iframe id="frame" src="iframe/local_security_iframe.html" style="width: 0px; height: 0px;"></iframe>

+    <div id="log"></div>

+    <script>

+		var t1 = async_test('storage local security test');

+

+		iframeWindow = document.getElementById('frame').contentWindow;

+

+		setTimeout(function(){

+			try {

+				var errFlag =iframeWindow.localStorage.getItem("Security");

+				t1.step(function() {

+					assert_equals(errFlag, "true", 'SECURITY_ERR error is not raised.')

+				});

+			} catch (e) {

+				t1.step(function() {

+					assert_unreached('Error is raised.');

+				});

+			}

+			t1.done();

+		}, 500);

+    </script>

+ </body>

+</html>

diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_storage_local_setitem.html b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_storage_local_setitem.html
new file mode 100644
index 0000000000..1225d8a7b7
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_storage_local_setitem.html
@@ -0,0 +1,19 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+ </head>
+ <body>
+    <h1>storage_local_setItem</h1>
+    <div id="log"></div>
+    <script>
+        test(function() {
+            localStorage.clear();
+            localStorage.setItem("name", "user1");
+            assert_equals(localStorage.length, 1, "localStorage.setItem")
+        });
+    </script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_storage_session_clear.html b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_storage_session_clear.html
new file mode 100644
index 0000000000..2d63a259a0
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_storage_session_clear.html
@@ -0,0 +1,25 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+ </head>
+ <body>
+    <h1>storage_session_clear</h1>
+    <div id="log"></div>
+    <script>
+        test(function() {
+            sessionStorage.clear();
+            sessionStorage.setItem("name", "user1");
+
+            assert_not_equals(sessionStorage.getItem("name"), null);
+            assert_equals(sessionStorage.length, 1);
+
+            sessionStorage.clear();
+            assert_equals(sessionStorage.getItem("name"), null, "sessionStorage.getItem('name')")
+            assert_equals(sessionStorage.length, 0, "sessionStorage.length")
+        });
+    </script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_storage_session_getitem.html b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_storage_session_getitem.html
new file mode 100644
index 0000000000..8f0b044529
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_storage_session_getitem.html
@@ -0,0 +1,23 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+ </head>
+ <body>
+    <h1>storage_session_getItem</h1>
+    <div id="log"></div>
+    <script>
+        test(function() {
+            sessionStorage.clear();
+            sessionStorage.setItem("name", "user1");
+            sessionStorage.setItem("age", "20");
+            test(function() {
+                assert_equals(sessionStorage.getItem("name"), "user1", "sessionStorage.getItem('name')")
+                assert_equals(sessionStorage.getItem("unknown"), null, "sessionStorage.getItem('unknown')")
+            }, "getItem method test")
+        });
+    </script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_storage_session_key.html b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_storage_session_key.html
new file mode 100644
index 0000000000..31911f99cb
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_storage_session_key.html
@@ -0,0 +1,40 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+ </head>
+ <body>
+    <h1>storage_session_key</h1>
+    <div id="log"></div>
+    <script>
+        test(function() {
+            sessionStorage.clear();
+
+            sessionStorage.setItem("name", "user1");
+            sessionStorage.setItem("age", "20");
+            sessionStorage.setItem("a", "1");
+            sessionStorage.setItem("b", "2");
+
+            var keys = ["name", "age", "a", "b"];
+            function doTest(index) {
+                test(function() {
+                    var key = sessionStorage.key(index);
+                    assert_not_equals(key, null);
+                    assert_true(keys.indexOf(key) >= 0,
+                                "Unexpected key " + key + " found.");
+                }, "key(" + index + ") should return the right thing.");
+            }
+            for (var i = 0; i < keys.length; ++i) {
+                doTest(i);
+                doTest(i + 0x100000000);
+            }
+            test(function() {
+                assert_equals(sessionStorage.key(-1), null, "sessionStorage.key(-1)");
+                assert_equals(sessionStorage.key(4), null, "sessionStorage.key(4)");
+            }, "key() should return null for out-of-range arguments.");
+        });
+    </script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_storage_session_length.html b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_storage_session_length.html
new file mode 100644
index 0000000000..daf06ccf60
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_storage_session_length.html
@@ -0,0 +1,23 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+ </head>
+ <body>
+    <h1>storage_session_length</h1>
+    <div id="log"></div>
+    <script>
+        test(function() {
+            sessionStorage.clear();
+            assert_equals(sessionStorage.length, 0, "sessionStorage.length")
+
+            sessionStorage.setItem("name", "user1");
+            sessionStorage.setItem("age", "20");
+
+            assert_equals(sessionStorage.length, 2, "sessionStorage.length")
+        });
+    </script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_storage_session_removeitem.html b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_storage_session_removeitem.html
new file mode 100644
index 0000000000..7601f1e6ed
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_storage_session_removeitem.html
@@ -0,0 +1,23 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+ </head>
+ <body>
+    <h1>storage_session_removeItem</h1>
+    <div id="log"></div>
+    <script>
+        test(function() {
+            sessionStorage.clear();
+            sessionStorage.setItem("name", "user1");
+            assert_equals(sessionStorage.getItem("name"), "user1");
+
+            sessionStorage.removeItem("name");
+            sessionStorage.removeItem("unknown");
+            assert_equals(sessionStorage.getItem("name"), null, "sessionStorage.getItem('name')")
+        });
+    </script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_storage_session_setitem.html b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_storage_session_setitem.html
new file mode 100644
index 0000000000..130d61e524
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Infraware/test_storage_session_setitem.html
@@ -0,0 +1,19 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+ </head>
+ <body>
+    <h1>storage_session_setItem</h1>
+    <div id="log"></div>
+    <script>
+        test(function() {
+            sessionStorage.clear();
+            sessionStorage.setItem("name", "user1");
+            assert_equals(sessionStorage.length, 1, "localStorage.setItem")
+        });
+    </script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/storage_builtins.js b/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/storage_builtins.js
new file mode 100644
index 0000000000..9c2f1a5ff3
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/storage_builtins.js
@@ -0,0 +1,15 @@
+function test_storage_builtins(aStorage) {
+    test(function() {
+        aStorage.clear();
+        assert_equals(aStorage.length, 0, "aStorage.length");
+
+        var builtins = ["key", "getItem", "setItem", "removeItem", "clear"];
+        var origBuiltins = builtins.map(function(b) { return Storage.prototype[b]; });
+        assert_array_equals(builtins.map(function(b) { return aStorage[b]; }), origBuiltins, "a");
+        builtins.forEach(function(b) { aStorage[b] = b; });
+        assert_array_equals(builtins.map(function(b) { return aStorage[b]; }), origBuiltins, "b");
+        assert_array_equals(builtins.map(function(b) { return aStorage.getItem(b); }), builtins, "c");
+
+        assert_equals(aStorage.length, builtins.length, "aStorage.length");
+    });
+}
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_event_constructor_js.html b/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_event_constructor_js.html
new file mode 100644
index 0000000000..3bfca4b138
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_event_constructor_js.html
@@ -0,0 +1,37 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+ </head>
+ <body>
+    <h1>event_Constructor</h1>
+    <div id="log"></div>
+    <script>
+        test(function() {
+            var t = async_test("StorageEvent constructor and nulls");
+            function onStorageEvent(event) {
+                t.step(function() {
+                    assert_equals(event.type, 'storage', 'type');
+                    assert_equals(event.key, null, 'key');
+                    assert_equals(event.oldValue, null, 'oldValue');
+                    assert_equals(event.newValue, null, 'newValue');
+                    assert_equals(event.url, 'null', 'url');
+                    assert_equals(event.storageArea, null, 'storageArea');
+                });
+                t.done();
+            }
+
+            window.addEventListener('storage', onStorageEvent, false);
+            var event = new StorageEvent('storage', {
+                key: null,
+                oldValue: null,
+                newValue: null,
+                url: null
+            });
+            window.dispatchEvent(event);
+        });
+    </script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_missing_arguments.html b/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_missing_arguments.html
new file mode 100644
index 0000000000..984c60a122
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_missing_arguments.html
@@ -0,0 +1,32 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+ </head>
+ <body>
+    <h1>missing_arguments</h1>
+    <div id="log"></div>
+    <script>
+        var tests = [
+            function() { localStorage.key(); },
+            function() { localStorage.getItem(); },
+            function() { localStorage.setItem(); },
+            function() { localStorage.setItem("a"); },
+            function() { localStorage.removeItem(); },
+            function() { sessionStorage.key(); },
+            function() { sessionStorage.getItem(); },
+            function() { sessionStorage.setItem(); },
+            function() { sessionStorage.setItem("a"); },
+            function() { sessionStorage.removeItem(); },
+            function() { new StorageEvent(); }
+        ];
+        tests.forEach(function(fun) {
+            test(function() {
+                assert_throws(new TypeError(), fun);
+            }, "Should throw TypeError for " + format_value(fun) + ".");
+        });
+    </script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_local_builtins.html b/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_local_builtins.html
new file mode 100644
index 0000000000..204c9bd77f
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_local_builtins.html
@@ -0,0 +1,16 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+  <script src="storage_builtins.js"></script>
+ </head>
+ <body>
+    <h1>storage_local_builtins</h1>
+    <div id="log"></div>
+    <script>
+        test_storage_builtins(localStorage);
+    </script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_local_clear_js.html b/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_local_clear_js.html
new file mode 100644
index 0000000000..84b4bd0871
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_local_clear_js.html
@@ -0,0 +1,25 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+ </head>
+ <body>
+    <h1>storage_local_clear</h1>
+    <div id="log"></div>
+    <script>
+        test(function() {
+            localStorage.clear();
+            localStorage.setItem("name", "user1");
+
+            assert_not_equals(localStorage.name, undefined);
+            assert_equals(localStorage.length, 1);
+
+            localStorage.clear();
+            assert_equals(localStorage.name, undefined, "localStorage.name")
+            assert_equals(localStorage.length, 0, "localStorage.length")
+        });
+    </script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_local_getitem_js.html b/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_local_getitem_js.html
new file mode 100644
index 0000000000..ecced7ff21
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_local_getitem_js.html
@@ -0,0 +1,38 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+ </head>
+ <body>
+    <h1>storage_local_getItem</h1>
+    <div id="log"></div>
+    <script>
+        test(function() {
+            localStorage.clear();
+            localStorage.setItem("undefined", "foo");
+            localStorage.setItem("null", "bar");
+            localStorage.setItem("", "baz");
+            test(function() {
+                assert_equals(localStorage.length, 3);
+            }, "All 3 items should be added.");
+            test(function() {
+                assert_equals(localStorage["unknown"], undefined, "localStorage['unknown']")
+                assert_equals(localStorage["undefined"], "foo", "localStorage['undefined']")
+                assert_equals(localStorage["null"], "bar", "localStorage['null']")
+                assert_equals(localStorage[undefined], "foo", "localStorage[undefined]")
+                assert_equals(localStorage[null], "bar", "localStorage[null]")
+                assert_equals(localStorage[""], "baz", "localStorage['']")
+            }, "array access should be correct");
+            test(function() {
+                assert_equals(localStorage.getItem("undefined"), "foo", "localStorage.getItem('undefined')")
+                assert_equals(localStorage.getItem("null"), "bar", "localStorage.getItem('null')")
+                assert_equals(localStorage.getItem(undefined), "foo", "localStorage.getItem(undefined)")
+                assert_equals(localStorage.getItem(null), "bar", "localStorage.getItem(null)")
+                assert_equals(localStorage.getItem(""), "baz", "localStorage.getItem('')")
+            }, "getItem should be correct")
+        });
+    </script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_local_in_js.html b/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_local_in_js.html
new file mode 100644
index 0000000000..b3f35cd9d9
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_local_in_js.html
@@ -0,0 +1,29 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+ </head>
+ <body>
+    <h1>storage_local_in</h1>
+    <div id="log"></div>
+    <script>
+        test(function() {
+            localStorage.clear();
+            assert_false("name" in localStorage);
+            localStorage["name"] = "user1";
+            assert_true("name" in localStorage);
+        });
+        test(function() {
+            localStorage.clear();
+            assert_false("name" in localStorage);
+            localStorage.setItem("name", "user1");
+            assert_true("name" in localStorage);
+            assert_equals(localStorage.name, "user1");
+            localStorage.removeItem("name");
+            assert_false("name" in localStorage);
+        });
+    </script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_local_index_js.html b/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_local_index_js.html
new file mode 100644
index 0000000000..71dabace16
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_local_index_js.html
@@ -0,0 +1,36 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+ </head>
+ <body>
+    <h1>storage_local_index</h1>
+    <div id="log"></div>
+    <script>
+        test(function() {
+            localStorage.clear();
+            localStorage["name"] = "user1";
+            localStorage["age"] = "42";
+            test(function() {
+                assert_equals(localStorage[-1], undefined);
+                assert_equals(localStorage[0], undefined);
+                assert_equals(localStorage[1], undefined);
+                assert_equals(localStorage[2], undefined);
+            })
+            test(function() {
+                assert_equals(localStorage["-1"], undefined);
+                assert_equals(localStorage["0"], undefined);
+                assert_equals(localStorage["1"], undefined);
+                assert_equals(localStorage["2"], undefined);
+            })
+            localStorage.setItem(1, "number");
+            test(function() {
+                assert_equals(localStorage[1], "number");
+                assert_equals(localStorage["1"], "number");
+            })
+        });
+    </script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_local_length_js.html b/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_local_length_js.html
new file mode 100644
index 0000000000..445db51892
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_local_length_js.html
@@ -0,0 +1,23 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+ </head>
+ <body>
+    <h1>storage_local_length</h1>
+    <div id="log"></div>
+    <script>
+        test(function() {
+            localStorage.clear();
+            assert_equals(localStorage.length, 0, "localStorage.length")
+
+            localStorage["name"] = "user1";
+            localStorage["age"] = "20";
+
+            assert_equals(localStorage.length, 2, "localStorage.length")
+        });
+    </script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_local_removeitem_js.html b/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_local_removeitem_js.html
new file mode 100644
index 0000000000..a8f10e80a4
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_local_removeitem_js.html
@@ -0,0 +1,37 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+ </head>
+ <body>
+    <h1>storage_local_removeItem</h1>
+    <div id="log"></div>
+    <script>
+        test(function() {
+            localStorage.clear();
+            localStorage.setItem("name", "user1");
+            assert_equals(localStorage.getItem("name"), "user1");
+
+            test(function() {
+                delete localStorage["name"];
+                delete localStorage["unknown"];
+                assert_equals(localStorage.getItem("name"), null, "localStorage.getItem('name')")
+            });
+            test(function() {
+                localStorage.setItem("null", "test");
+                assert_true("null" in localStorage);
+                localStorage.removeItem(null, "test");
+                assert_false("null" in localStorage);
+            });
+            test(function() {
+                localStorage.setItem("undefined", "test");
+                assert_true("undefined" in localStorage);
+                localStorage.removeItem(undefined, "test");
+                assert_false("undefined" in localStorage);
+            });
+        });
+    </script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_local_setitem_js.html b/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_local_setitem_js.html
new file mode 100644
index 0000000000..9549fa52f4
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_local_setitem_js.html
@@ -0,0 +1,119 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+ </head>
+ <body>
+    <h1>storage_local_setItem</h1>
+    <div id="log"></div>
+    <script>
+        var test_error = { name: "test" };
+        test(function() {
+            localStorage.clear();
+            test(function() {
+                assert_false("name" in localStorage);
+                assert_false("age" in localStorage);
+            });
+            test(function() {
+                localStorage["name"] = "user1";
+                assert_true("name" in localStorage);
+                assert_equals(localStorage.length, 1, "localStorage.length")
+                assert_equals(localStorage.getItem("name"), "user1");
+                assert_equals(localStorage["name"], "user1");
+            });
+            test(function() {
+                localStorage["name"] = "user2";
+                assert_true("name" in localStorage);
+                assert_equals(localStorage.length, 1, "localStorage.length")
+                assert_equals(localStorage.getItem("name"), "user2");
+                assert_equals(localStorage["name"], "user2");
+            });
+            test(function() {
+                localStorage.setItem("name", "user3");
+                assert_true("name" in localStorage);
+                assert_equals(localStorage.length, 1, "localStorage.length")
+                assert_equals(localStorage.getItem("name"), "user3");
+                assert_equals(localStorage["name"], "user3");
+            });
+            test(function() {
+                localStorage.setItem("age", null);
+                assert_true("age" in localStorage);
+                assert_equals(localStorage.length, 2, "localStorage.length")
+                assert_equals(localStorage.getItem("age"), "null");
+                assert_equals(localStorage["age"], "null");
+            });
+            test(function() {
+                localStorage["age"] = null;
+                assert_true("age" in localStorage);
+                assert_equals(localStorage.length, 2, "localStorage.length")
+                assert_equals(localStorage.getItem("age"), "null");
+                assert_equals(localStorage["age"], "null");
+            });
+            test(function() {
+                localStorage.setItem("age", undefined);
+                assert_true("age" in localStorage);
+                assert_equals(localStorage.length, 2, "localStorage.length")
+                assert_equals(localStorage.getItem("age"), "undefined");
+                assert_equals(localStorage["age"], "undefined");
+            });
+            test(function() {
+                localStorage["age"] = undefined;
+                assert_true("age" in localStorage);
+                assert_equals(localStorage.length, 2, "localStorage.length")
+                assert_equals(localStorage.getItem("age"), "undefined");
+                assert_equals(localStorage["age"], "undefined");
+            });
+            test(function() {
+                assert_throws(test_error, function() {
+                    localStorage.setItem("age",
+                        { toString: function() { throw test_error; } });
+                });
+                assert_true("age" in localStorage);
+                assert_equals(localStorage.length, 2, "localStorage.length")
+                assert_equals(localStorage.getItem("age"), "undefined");
+                assert_equals(localStorage["age"], "undefined");
+            });
+            test(function() {
+                assert_throws(test_error, function() {
+                    localStorage["age"] =
+                        { toString: function() { throw test_error; } };
+                });
+                assert_true("age" in localStorage);
+                assert_equals(localStorage.length, 2, "localStorage.length")
+                assert_equals(localStorage.getItem("age"), "undefined");
+                assert_equals(localStorage["age"], "undefined");
+            });
+            test(function() {
+                localStorage.setItem(undefined, "test");
+                assert_true("undefined" in localStorage);
+                assert_equals(localStorage.length, 3, "localStorage.length")
+                assert_equals(localStorage.getItem("undefined"), "test");
+                assert_equals(localStorage["undefined"], "test");
+            });
+            test(function() {
+                localStorage[undefined] = "test2";
+                assert_true("undefined" in localStorage);
+                assert_equals(localStorage.length, 3, "localStorage.length")
+                assert_equals(localStorage.getItem("undefined"), "test2");
+                assert_equals(localStorage["undefined"], "test2");
+            });
+            test(function() {
+                localStorage.setItem(null, "test");
+                assert_true("null" in localStorage);
+                assert_equals(localStorage.length, 4, "localStorage.length")
+                assert_equals(localStorage.getItem("null"), "test");
+                assert_equals(localStorage["null"], "test");
+            });
+            test(function() {
+                localStorage[null] = "test2";
+                assert_true("null" in localStorage);
+                assert_equals(localStorage.length, 4, "localStorage.length")
+                assert_equals(localStorage.getItem("null"), "test2");
+                assert_equals(localStorage["null"], "test2");
+            });
+        });
+    </script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_session_builtins.html b/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_session_builtins.html
new file mode 100644
index 0000000000..ad9ae642d8
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_session_builtins.html
@@ -0,0 +1,16 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+  <script src="storage_builtins.js"></script>
+ </head>
+ <body>
+    <h1>storage_session_builtins</h1>
+    <div id="log"></div>
+    <script>
+        test_storage_builtins(sessionStorage);
+    </script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_session_clear_js.html b/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_session_clear_js.html
new file mode 100644
index 0000000000..a6805f7a84
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_session_clear_js.html
@@ -0,0 +1,25 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+ </head>
+ <body>
+    <h1>storage_session_clear</h1>
+    <div id="log"></div>
+    <script>
+        test(function() {
+            sessionStorage.clear();
+            sessionStorage.setItem("name", "user1");
+
+            assert_not_equals(sessionStorage.name, undefined);
+            assert_equals(sessionStorage.length, 1);
+
+            sessionStorage.clear();
+            assert_equals(sessionStorage.name, undefined, "sessionStorage.name")
+            assert_equals(sessionStorage.length, 0, "sessionStorage.length")
+        });
+    </script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_session_getitem_js.html b/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_session_getitem_js.html
new file mode 100644
index 0000000000..bc37c47e9e
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_session_getitem_js.html
@@ -0,0 +1,38 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+ </head>
+ <body>
+    <h1>storage_session_getItem</h1>
+    <div id="log"></div>
+    <script>
+        test(function() {
+            sessionStorage.clear();
+            sessionStorage.setItem("undefined", "foo");
+            sessionStorage.setItem("null", "bar");
+            sessionStorage.setItem("", "baz");
+            test(function() {
+                assert_equals(sessionStorage.length, 3);
+            }, "All 3 items should be added.");
+            test(function() {
+                assert_equals(sessionStorage["unknown"], undefined, "sessionStorage['unknown']")
+                assert_equals(sessionStorage["undefined"], "foo", "sessionStorage['undefined']")
+                assert_equals(sessionStorage["null"], "bar", "sessionStorage['null']")
+                assert_equals(sessionStorage[undefined], "foo", "sessionStorage[undefined]")
+                assert_equals(sessionStorage[null], "bar", "sessionStorage[null]")
+                assert_equals(sessionStorage[""], "baz", "sessionStorage['']")
+            }, "array access should be correct");
+            test(function() {
+                assert_equals(sessionStorage.getItem("undefined"), "foo", "sessionStorage.getItem('undefined')")
+                assert_equals(sessionStorage.getItem("null"), "bar", "sessionStorage.getItem('null')")
+                assert_equals(sessionStorage.getItem(undefined), "foo", "sessionStorage.getItem(undefined)")
+                assert_equals(sessionStorage.getItem(null), "bar", "sessionStorage.getItem(null)")
+                assert_equals(sessionStorage.getItem(""), "baz", "sessionStorage.getItem('')")
+            }, "getItem should be correct")
+        });
+    </script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_session_in_js.html b/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_session_in_js.html
new file mode 100644
index 0000000000..a285357d29
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_session_in_js.html
@@ -0,0 +1,29 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+ </head>
+ <body>
+    <h1>storage_session_in</h1>
+    <div id="log"></div>
+    <script>
+        test(function() {
+            sessionStorage.clear();
+            assert_false("name" in sessionStorage);
+            sessionStorage["name"] = "user1";
+            assert_true("name" in sessionStorage);
+        });
+        test(function() {
+            sessionStorage.clear();
+            assert_false("name" in sessionStorage);
+            sessionStorage.setItem("name", "user1");
+            assert_true("name" in sessionStorage);
+            assert_equals(sessionStorage.name, "user1");
+            sessionStorage.removeItem("name");
+            assert_false("name" in sessionStorage);
+        });
+    </script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_session_index_js.html b/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_session_index_js.html
new file mode 100644
index 0000000000..1aec8715ac
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_session_index_js.html
@@ -0,0 +1,36 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+ </head>
+ <body>
+    <h1>storage_session_index</h1>
+    <div id="log"></div>
+    <script>
+        test(function() {
+            sessionStorage.clear();
+            sessionStorage["name"] = "user1";
+            sessionStorage["age"] = "42";
+            test(function() {
+                assert_equals(sessionStorage[-1], undefined);
+                assert_equals(sessionStorage[0], undefined);
+                assert_equals(sessionStorage[1], undefined);
+                assert_equals(sessionStorage[2], undefined);
+            })
+            test(function() {
+                assert_equals(sessionStorage["-1"], undefined);
+                assert_equals(sessionStorage["0"], undefined);
+                assert_equals(sessionStorage["1"], undefined);
+                assert_equals(sessionStorage["2"], undefined);
+            })
+            sessionStorage.setItem(1, "number");
+            test(function() {
+                assert_equals(sessionStorage[1], "number");
+                assert_equals(sessionStorage["1"], "number");
+            })
+        });
+    </script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_session_length_js.html b/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_session_length_js.html
new file mode 100644
index 0000000000..50e05a26de
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_session_length_js.html
@@ -0,0 +1,23 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+ </head>
+ <body>
+    <h1>storage_session_length</h1>
+    <div id="log"></div>
+    <script>
+        test(function() {
+            sessionStorage.clear();
+            assert_equals(sessionStorage.length, 0, "sessionStorage.length")
+
+            sessionStorage["name"] = "user1";
+            sessionStorage["age"] = "20";
+
+            assert_equals(sessionStorage.length, 2, "sessionStorage.length")
+        });
+    </script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_session_removeitem_js.html b/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_session_removeitem_js.html
new file mode 100644
index 0000000000..5012cffb79
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_session_removeitem_js.html
@@ -0,0 +1,37 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+ </head>
+ <body>
+    <h1>storage_session_removeItem</h1>
+    <div id="log"></div>
+    <script>
+        test(function() {
+            sessionStorage.clear();
+            sessionStorage.setItem("name", "user1");
+            assert_equals(sessionStorage.getItem("name"), "user1");
+
+            test(function() {
+                delete sessionStorage["name"];
+                delete sessionStorage["unknown"];
+                assert_equals(sessionStorage.getItem("name"), null, "sessionStorage.getItem('name')")
+            });
+            test(function() {
+                sessionStorage.setItem("null", "test");
+                assert_true("null" in sessionStorage);
+                sessionStorage.removeItem(null, "test");
+                assert_false("null" in sessionStorage);
+            });
+            test(function() {
+                sessionStorage.setItem("undefined", "test");
+                assert_true("undefined" in sessionStorage);
+                sessionStorage.removeItem(undefined, "test");
+                assert_false("undefined" in sessionStorage);
+            });
+        });
+    </script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_session_setitem_js.html b/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_session_setitem_js.html
new file mode 100644
index 0000000000..8f2339c5f4
--- /dev/null
+++ b/dom/imptests/webapps/WebStorage/tests/submissions/Ms2ger/test_storage_session_setitem_js.html
@@ -0,0 +1,119 @@
+<!DOCTYPE HTML>
+<html>
+ <head>
+  <title>Web Storage</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+ </head>
+ <body>
+    <h1>storage_session_setItem</h1>
+    <div id="log"></div>
+    <script>
+        var test_error = { name: "test" };
+        test(function() {
+            sessionStorage.clear();
+            test(function() {
+                assert_false("name" in sessionStorage);
+                assert_false("age" in sessionStorage);
+            });
+            test(function() {
+                sessionStorage["name"] = "user1";
+                assert_true("name" in sessionStorage);
+                assert_equals(sessionStorage.length, 1, "sessionStorage.length")
+                assert_equals(sessionStorage.getItem("name"), "user1");
+                assert_equals(sessionStorage["name"], "user1");
+            });
+            test(function() {
+                sessionStorage["name"] = "user2";
+                assert_true("name" in sessionStorage);
+                assert_equals(sessionStorage.length, 1, "sessionStorage.length")
+                assert_equals(sessionStorage.getItem("name"), "user2");
+                assert_equals(sessionStorage["name"], "user2");
+            });
+            test(function() {
+                sessionStorage.setItem("name", "user3");
+                assert_true("name" in sessionStorage);
+                assert_equals(sessionStorage.length, 1, "sessionStorage.length")
+                assert_equals(sessionStorage.getItem("name"), "user3");
+                assert_equals(sessionStorage["name"], "user3");
+            });
+            test(function() {
+                sessionStorage.setItem("age", null);
+                assert_true("age" in sessionStorage);
+                assert_equals(sessionStorage.length, 2, "sessionStorage.length")
+                assert_equals(sessionStorage.getItem("age"), "null");
+                assert_equals(sessionStorage["age"], "null");
+            });
+            test(function() {
+                sessionStorage["age"] = null;
+                assert_true("age" in sessionStorage);
+                assert_equals(sessionStorage.length, 2, "sessionStorage.length")
+                assert_equals(sessionStorage.getItem("age"), "null");
+                assert_equals(sessionStorage["age"], "null");
+            });
+            test(function() {
+                sessionStorage.setItem("age", undefined);
+                assert_true("age" in sessionStorage);
+                assert_equals(sessionStorage.length, 2, "sessionStorage.length")
+                assert_equals(sessionStorage.getItem("age"), "undefined");
+                assert_equals(sessionStorage["age"], "undefined");
+            });
+            test(function() {
+                sessionStorage["age"] = undefined;
+                assert_true("age" in sessionStorage);
+                assert_equals(sessionStorage.length, 2, "sessionStorage.length")
+                assert_equals(sessionStorage.getItem("age"), "undefined");
+                assert_equals(sessionStorage["age"], "undefined");
+            });
+            test(function() {
+                assert_throws(test_error, function() {
+                    sessionStorage.setItem("age",
+                        { toString: function() { throw test_error; } });
+                });
+                assert_true("age" in sessionStorage);
+                assert_equals(sessionStorage.length, 2, "sessionStorage.length")
+                assert_equals(sessionStorage.getItem("age"), "undefined");
+                assert_equals(sessionStorage["age"], "undefined");
+            });
+            test(function() {
+                assert_throws(test_error, function() {
+                    sessionStorage["age"] =
+                        { toString: function() { throw test_error; } };
+                });
+                assert_true("age" in sessionStorage);
+                assert_equals(sessionStorage.length, 2, "sessionStorage.length")
+                assert_equals(sessionStorage.getItem("age"), "undefined");
+                assert_equals(sessionStorage["age"], "undefined");
+            });
+            test(function() {
+                sessionStorage.setItem(undefined, "test");
+                assert_true("undefined" in sessionStorage);
+                assert_equals(sessionStorage.length, 3, "sessionStorage.length")
+                assert_equals(sessionStorage.getItem("undefined"), "test");
+                assert_equals(sessionStorage["undefined"], "test");
+            });
+            test(function() {
+                sessionStorage[undefined] = "test2";
+                assert_true("undefined" in sessionStorage);
+                assert_equals(sessionStorage.length, 3, "sessionStorage.length")
+                assert_equals(sessionStorage.getItem("undefined"), "test2");
+                assert_equals(sessionStorage["undefined"], "test2");
+            });
+            test(function() {
+                sessionStorage.setItem(null, "test");
+                assert_true("null" in sessionStorage);
+                assert_equals(sessionStorage.length, 4, "sessionStorage.length")
+                assert_equals(sessionStorage.getItem("null"), "test");
+                assert_equals(sessionStorage["null"], "test");
+            });
+            test(function() {
+                sessionStorage[null] = "test2";
+                assert_true("null" in sessionStorage);
+                assert_equals(sessionStorage.length, 4, "sessionStorage.length")
+                assert_equals(sessionStorage.getItem("null"), "test2");
+                assert_equals(sessionStorage["null"], "test2");
+            });
+        });
+    </script>
+ </body>
+</html>
diff --git a/dom/imptests/webapps/XMLHttpRequest/tests/submissions/Ms2ger/test_FormData-append.html b/dom/imptests/webapps/XMLHttpRequest/tests/submissions/Ms2ger/test_FormData-append.html
new file mode 100644
index 0000000000..b05c5169b5
--- /dev/null
+++ b/dom/imptests/webapps/XMLHttpRequest/tests/submissions/Ms2ger/test_FormData-append.html
@@ -0,0 +1,14 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>FormData.append</title>
+<link rel=help href=http://xhr.spec.whatwg.org/#dom-formdata-append>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<div id=log></div>
+<script>
+test(function() {
+  var fd = new FormData();
+  fd.append("name", new String("value"));
+  // TODO: test that it actually worked.
+}, "Passing a String object to FormData.append should work.");
+</script>
diff --git a/dom/imptests/webapps/XMLHttpRequest/tests/submissions/Ms2ger/test_interfaces.html b/dom/imptests/webapps/XMLHttpRequest/tests/submissions/Ms2ger/test_interfaces.html
new file mode 100644
index 0000000000..165d013d29
--- /dev/null
+++ b/dom/imptests/webapps/XMLHttpRequest/tests/submissions/Ms2ger/test_interfaces.html
@@ -0,0 +1,102 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>XMLHttpRequest IDL tests</title>
+<div id=log></div>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script src=/resources/WebIDLParser.js></script>
+<script src=/resources/idlharness.js></script>
+<script type=text/plain class=untested>
+interface EventTarget {
+  void addEventListener(DOMString type, EventListener? callback, optional boolean capture /* = false */);
+  void removeEventListener(DOMString type, EventListener? callback, optional boolean capture /* = false */);
+  boolean dispatchEvent(Event event);
+};
+</script>
+<script type=text/plain>
+[NoInterfaceObject]
+interface XMLHttpRequestEventTarget : EventTarget {
+  // event handlers
+  [TreatNonCallableAsNull] attribute Function? onloadstart;
+  [TreatNonCallableAsNull] attribute Function? onprogress;
+  [TreatNonCallableAsNull] attribute Function? onabort;
+  [TreatNonCallableAsNull] attribute Function? onerror;
+  [TreatNonCallableAsNull] attribute Function? onload;
+  [TreatNonCallableAsNull] attribute Function? ontimeout;
+  [TreatNonCallableAsNull] attribute Function? onloadend;
+};
+
+interface XMLHttpRequestUpload : XMLHttpRequestEventTarget {
+
+};
+
+/*
+enum XMLHttpRequestResponseType {
+  "",
+  "arraybuffer",
+  "blob",
+  "document",
+  "json",
+  "text"
+};
+*/
+
+[Constructor]
+interface XMLHttpRequest : XMLHttpRequestEventTarget {
+  // event handler
+  [TreatNonCallableAsNull] attribute Function? onreadystatechange;
+
+  // states
+  const unsigned short UNSENT = 0;
+  const unsigned short OPENED = 1;
+  const unsigned short HEADERS_RECEIVED = 2;
+  const unsigned short LOADING = 3;
+  const unsigned short DONE = 4;
+  readonly attribute unsigned short readyState;
+
+  // request
+  void open(DOMString method, DOMString url, optional boolean async/* = true*/, optional DOMString? user, optional DOMString? password);
+  void setRequestHeader(DOMString header, DOMString value);
+           attribute unsigned long timeout;
+           attribute boolean withCredentials;
+  readonly attribute XMLHttpRequestUpload upload;
+  void send(optional (ArrayBufferView or Blob or Document or DOMString or FormData)? data/* = null*/);
+  void abort();
+
+  // response
+  readonly attribute unsigned short status;
+  readonly attribute DOMString statusText;
+  DOMString? getResponseHeader(DOMString header);
+  DOMString getAllResponseHeaders();
+  void overrideMimeType(DOMString mime);
+/*           attribute XMLHttpRequestResponseType responseType; */
+  readonly attribute any response;
+  readonly attribute DOMString responseText;
+  readonly attribute Document? responseXML;
+};
+
+[Constructor,
+ Constructor(HTMLFormElement form)]
+interface FormData {
+  void append(DOMString name, Blob value, optional DOMString filename);
+  void append(DOMString name, DOMString value);
+};
+</script>
+<script>
+"use strict";
+var form = document.createElement("form");
+var idlArray = new IdlArray();
+[].forEach.call(document.querySelectorAll("script[type=text\\/plain]"), function(node) {
+  if (node.className == "untested") {
+    idlArray.add_untested_idls(node.textContent);
+  } else {
+    idlArray.add_idls(node.textContent);
+  }
+});
+idlArray.add_objects({
+  XMLHttpRequest: ['new XMLHttpRequest()'],
+  XMLHttpRequestUpload: ['(new XMLHttpRequest()).upload'],
+  FormData: ['new FormData()', 'new FormData(form)']
+});
+idlArray.test();
+</script>
diff --git a/dom/imptests/webapps/XMLHttpRequest/tests/submissions/Ms2ger/test_setrequestheader-invalid-arguments.htm b/dom/imptests/webapps/XMLHttpRequest/tests/submissions/Ms2ger/test_setrequestheader-invalid-arguments.htm
new file mode 100644
index 0000000000..a077ad95f2
--- /dev/null
+++ b/dom/imptests/webapps/XMLHttpRequest/tests/submissions/Ms2ger/test_setrequestheader-invalid-arguments.htm
@@ -0,0 +1,42 @@
+<!doctype html>
+<html>
+  <head>
+    <title>XMLHttpRequest: setRequestHeader() with invalid arguments</title>
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+  </head>
+  <body>
+    <div id="log"></div>
+<!--
+       CHAR           = <any US-ASCII character (octets 0 - 127)>
+       CTL            = <any US-ASCII control character
+                        (octets 0 - 31) and DEL (127)>
+       SP             = <US-ASCII SP, space (32)>
+       HT             = <US-ASCII HT, horizontal-tab (9)>
+       token          = 1*<any CHAR except CTLs or separators>
+       separators     = "(" | ")" | "<" | ">" | "@"
+                      | "," | ";" | ":" | "\" | <">
+                      | "/" | "[" | "]" | "?" | "="
+                      | "{" | "}" | SP | HT
+       field-name     = token
+-->
+    <script>
+      var invalid_headers = ["(", ")", "<", ">", "@", ",", ";", ":", "\\",
+                             "\"", "/", "[", "]", "?", "=", "{", "}", " ",
+                             "\u0009", "\u007f"]
+      for (var i = 0; i < 32; ++i) {
+        invalid_headers.push(String.fromCharCode(i))
+      }
+      for (var i = 0; i < invalid_headers.length; ++i) {
+        test(function() {
+          assert_throws("SYNTAX_ERR", function() {
+            var client = new XMLHttpRequest()
+            client.open("GET", "../resources/delay.php?ms=0")
+            client.setRequestHeader(invalid_headers[i], "test")
+          }, "setRequestHeader should throw with header " +
+             format_value(invalid_headers[i]) +".")
+        })
+      }
+    </script>
+  </body>
+</html>
diff --git a/dom/imptests/webapps/mochitest.ini b/dom/imptests/webapps/mochitest.ini
new file mode 100644
index 0000000000..0eea5c631b
--- /dev/null
+++ b/dom/imptests/webapps/mochitest.ini
@@ -0,0 +1,60 @@
+# THIS FILE IS AUTOGENERATED BY importTestsuite.py - DO NOT EDIT
+[DEFAULT]
+support-files =
+  WebStorage/tests/submissions/Infraware/iframe/local_change_item_iframe.html
+  WebStorage/tests/submissions/Infraware/iframe/local_security_iframe.html
+  WebStorage/tests/submissions/Infraware/iframe/local_set_item_clear_iframe.html
+  WebStorage/tests/submissions/Infraware/iframe/local_set_item_iframe.html
+  WebStorage/tests/submissions/Infraware/iframe/session_change_item_iframe.html
+  WebStorage/tests/submissions/Infraware/iframe/session_set_item_clear_iframe.html
+  WebStorage/tests/submissions/Infraware/iframe/session_set_item_iframe.html
+  WebStorage/tests/submissions/Ms2ger/storage_builtins.js
+
+[WebStorage/tests/submissions/Infraware/test_event_constructor.html]
+[WebStorage/tests/submissions/Infraware/test_event_local_key.html]
+[WebStorage/tests/submissions/Infraware/test_event_local_newvalue.html]
+[WebStorage/tests/submissions/Infraware/test_event_local_oldvalue.html]
+[WebStorage/tests/submissions/Infraware/test_event_local_storagearea.html]
+[WebStorage/tests/submissions/Infraware/test_event_local_storageeventinit.html]
+[WebStorage/tests/submissions/Infraware/test_event_local_url.html]
+[WebStorage/tests/submissions/Infraware/test_event_session_key.html]
+[WebStorage/tests/submissions/Infraware/test_event_session_newvalue.html]
+[WebStorage/tests/submissions/Infraware/test_event_session_oldvalue.html]
+[WebStorage/tests/submissions/Infraware/test_event_session_storagearea.html]
+[WebStorage/tests/submissions/Infraware/test_event_session_storageeventinit.html]
+[WebStorage/tests/submissions/Infraware/test_event_session_url.html]
+[WebStorage/tests/submissions/Infraware/test_storage_local_clear.html]
+[WebStorage/tests/submissions/Infraware/test_storage_local_getitem.html]
+[WebStorage/tests/submissions/Infraware/test_storage_local_key.html]
+skip-if = toolkit == 'android' #bug 775227
+[WebStorage/tests/submissions/Infraware/test_storage_local_length.html]
+[WebStorage/tests/submissions/Infraware/test_storage_local_removeitem.html]
+[WebStorage/tests/submissions/Infraware/test_storage_local_security.html]
+[WebStorage/tests/submissions/Infraware/test_storage_local_setitem.html]
+[WebStorage/tests/submissions/Infraware/test_storage_session_clear.html]
+[WebStorage/tests/submissions/Infraware/test_storage_session_getitem.html]
+[WebStorage/tests/submissions/Infraware/test_storage_session_key.html]
+[WebStorage/tests/submissions/Infraware/test_storage_session_length.html]
+[WebStorage/tests/submissions/Infraware/test_storage_session_removeitem.html]
+[WebStorage/tests/submissions/Infraware/test_storage_session_setitem.html]
+[WebStorage/tests/submissions/Ms2ger/test_event_constructor_js.html]
+[WebStorage/tests/submissions/Ms2ger/test_missing_arguments.html]
+[WebStorage/tests/submissions/Ms2ger/test_storage_local_builtins.html]
+[WebStorage/tests/submissions/Ms2ger/test_storage_local_clear_js.html]
+[WebStorage/tests/submissions/Ms2ger/test_storage_local_getitem_js.html]
+[WebStorage/tests/submissions/Ms2ger/test_storage_local_in_js.html]
+[WebStorage/tests/submissions/Ms2ger/test_storage_local_index_js.html]
+[WebStorage/tests/submissions/Ms2ger/test_storage_local_length_js.html]
+[WebStorage/tests/submissions/Ms2ger/test_storage_local_removeitem_js.html]
+[WebStorage/tests/submissions/Ms2ger/test_storage_local_setitem_js.html]
+[WebStorage/tests/submissions/Ms2ger/test_storage_session_builtins.html]
+[WebStorage/tests/submissions/Ms2ger/test_storage_session_clear_js.html]
+[WebStorage/tests/submissions/Ms2ger/test_storage_session_getitem_js.html]
+[WebStorage/tests/submissions/Ms2ger/test_storage_session_in_js.html]
+[WebStorage/tests/submissions/Ms2ger/test_storage_session_index_js.html]
+[WebStorage/tests/submissions/Ms2ger/test_storage_session_length_js.html]
+[WebStorage/tests/submissions/Ms2ger/test_storage_session_removeitem_js.html]
+[WebStorage/tests/submissions/Ms2ger/test_storage_session_setitem_js.html]
+[XMLHttpRequest/tests/submissions/Ms2ger/test_FormData-append.html]
+[XMLHttpRequest/tests/submissions/Ms2ger/test_interfaces.html]
+[XMLHttpRequest/tests/submissions/Ms2ger/test_setrequestheader-invalid-arguments.htm]
diff --git a/dom/imptests/writeBuildFiles.py b/dom/imptests/writeBuildFiles.py
new file mode 100644
index 0000000000..5a12add838
--- /dev/null
+++ b/dom/imptests/writeBuildFiles.py
@@ -0,0 +1,43 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this file,
+# You can obtain one at http://mozilla.org/MPL/2.0/.
+
+from __future__ import unicode_literals
+
+import string
+
+manifest_template = """# THIS FILE IS AUTOGENERATED BY ${caller} - DO NOT EDIT
+[DEFAULT]
+support-files =
+${supportfiles}
+
+${tests}
+"""
+
+reftest_template = """# THIS FILE IS AUTOGENERATED BY ${caller} - DO NOT EDIT
+
+${reftests}
+"""
+
+
+
+def substManifest(caller, test_files, support_files):
+    test_files = [f.lstrip('/') for f in test_files]
+    support_files = [f.lstrip('/') for f in support_files]
+
+    return string.Template(manifest_template).substitute({
+        'caller': caller,
+        'supportfiles': '\n'.join('  %s' % f for f in sorted(support_files)),
+        'tests': '\n'.join('[%s]' % f for f in sorted(test_files))
+    })
+
+
+def substReftestList(caller, tests):
+    def reftests(tests):
+        return "\n".join(" ".join(line) for line in tests)
+
+    return string.Template(reftest_template).substitute({
+        "caller": caller,
+        "reftests": reftests(tests),
+    })
+