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diff --git a/uriloader/exthandler/mac/nsOSHelperAppService.h b/uriloader/exthandler/mac/nsOSHelperAppService.h
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+++ b/uriloader/exthandler/mac/nsOSHelperAppService.h
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+/* -*- Mode: C++; tab-width: 3; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * 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/. */
+
+#ifndef nsOSHelperAppService_h__
+#define nsOSHelperAppService_h__
+
+// The OS helper app service is a subclass of nsExternalHelperAppService and is implemented on each
+// platform. It contains platform specific code for finding helper applications for a given mime type
+// in addition to launching those applications. This is the Mac version.
+
+#include "nsExternalHelperAppService.h"
+#include "nsCExternalHandlerService.h"
+#include "nsMIMEInfoImpl.h"
+#include "nsCOMPtr.h"
+
+class nsOSHelperAppService : public nsExternalHelperAppService
+{
+public:
+ nsOSHelperAppService();
+ virtual ~nsOSHelperAppService();
+
+ // override nsIExternalProtocolService methods
+ NS_IMETHOD GetApplicationDescription(const nsACString& aScheme, nsAString& _retval);
+
+ // method overrides --> used to hook the mime service into internet config....
+ NS_IMETHOD GetFromTypeAndExtension(const nsACString& aType, const nsACString& aFileExt, nsIMIMEInfo ** aMIMEInfo);
+ already_AddRefed<nsIMIMEInfo> GetMIMEInfoFromOS(const nsACString& aMIMEType, const nsACString& aFileExt, bool * aFound);
+ NS_IMETHOD GetProtocolHandlerInfoFromOS(const nsACString &aScheme,
+ bool *found,
+ nsIHandlerInfo **_retval);
+
+ // GetFileTokenForPath must be implemented by each platform.
+ // platformAppPath --> a platform specific path to an application that we got out of the
+ // rdf data source. This can be a mac file spec, a unix path or a windows path depending on the platform
+ // aFile --> an nsIFile representation of that platform application path.
+ virtual MOZ_MUST_USE nsresult GetFileTokenForPath(const char16_t * platformAppPath, nsIFile ** aFile);
+
+ MOZ_MUST_USE nsresult OSProtocolHandlerExists(const char * aScheme,
+ bool * aHandlerExists);
+
+private:
+ uint32_t mPermissions;
+};
+
+#endif // nsOSHelperAppService_h__