Issue #2053 - Part 2: Update PerformanceMeasure to User Timing L3

There are a few minor differences between this and Mozilla's implementation:
(a) The type error messages were not hardcoded to the Performance class and were moved to Errors.msg instead.
(b) PerformanceMeasureOptions is used directly and doesn't use the the Maybe<> container class. I haven't found the reason yet, but PerformanceMeasureOptions is disallowed from having a copy constructor and without that, it isn't possible to use it with Maybe<>... There doesn't seem to be any problem with using it directly, though.
(c) Resist fingerprinting-pref changes were skipped.

Partially based on https://bugzilla.mozilla.org/show_bug.cgi?id=1762482

2 files changed, 12 insertions, 1 deletions

diff --git a/dom/webidl/Performance.webidl b/dom/webidl/Performance.webidl
index 16223065d0..e681505216 100644
--- a/dom/webidl/Performance.webidl
+++ b/dom/webidl/Performance.webidl
@@ -44,6 +44,14 @@ partial interface Performance {
     entryType);
 };
 
+// https://w3c.github.io/user-timing/#extensions-performance-interface
+dictionary PerformanceMeasureOptions {
+  any detail;
+  (DOMString or DOMHighResTimeStamp) start;
+  DOMHighResTimeStamp duration;
+  (DOMString or DOMHighResTimeStamp)end;
+};
+
 // http://www.w3.org/TR/resource-timing/#extensions-performance-interface
 [Exposed=Window]
 partial interface Performance {
@@ -72,7 +80,9 @@ partial interface Performance {
   [Func="Performance::IsEnabled"]
   void clearMarks(optional DOMString markName);
   [Func="Performance::IsEnabled", Throws]
-  void measure(DOMString measureName, optional DOMString startMark, optional DOMString endMark);
+  PerformanceMeasure measure(DOMString measureName,
+                             optional (DOMString or PerformanceMeasureOptions) startOrMeasureOptions,
+                             optional DOMString endMark);
   [Func="Performance::IsEnabled"]
   void clearMeasures(optional DOMString measureName);
 };
diff --git a/dom/webidl/PerformanceMeasure.webidl b/dom/webidl/PerformanceMeasure.webidl
index aa4e8cd256..a520778b88 100644
--- a/dom/webidl/PerformanceMeasure.webidl
+++ b/dom/webidl/PerformanceMeasure.webidl
@@ -10,4 +10,5 @@
 [Exposed=(Window,Worker)]
 interface PerformanceMeasure : PerformanceEntry
 {
+  readonly attribute any detail;
 };