Add Chromium-side changes for MediaSource::isTypeSupported()

content/worker/worker_webkitplatformsupport_impl.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_WORKER_WORKER_WEBKITPLATFORMSUPPORT_IMPL_H_
 #define CONTENT_WORKER_WORKER_WEBKITPLATFORMSUPPORT_IMPL_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "content/common/webkitplatformsupport_impl.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebMimeRegistry.h"
@@ skipping 61 matching lines @@
       const WebKit::WebString&);
   virtual WebKit::WebMimeRegistry::SupportsType supportsJavaScriptMIMEType(
       const WebKit::WebString&);
   // TODO(ddorwin): Remove after http://webk.it/82983 lands.
   virtual WebKit::WebMimeRegistry::SupportsType supportsMediaMIMEType(
       const WebKit::WebString&, const WebKit::WebString&);
   virtual WebKit::WebMimeRegistry::SupportsType supportsMediaMIMEType(
       const WebKit::WebString&,
       const WebKit::WebString&,
       const WebKit::WebString&);
+  virtual bool supportsMediaSourceMIMEType(
+      const WebKit::WebString&,
+      const WebKit::WebString&);
   virtual WebKit::WebMimeRegistry::SupportsType supportsNonImageMIMEType(
       const WebKit::WebString&);
   virtual WebKit::WebString mimeTypeForExtension(const WebKit::WebString&);
   virtual WebKit::WebString wellKnownMimeTypeForExtension(
       const WebKit::WebString&);
   virtual WebKit::WebString mimeTypeFromFile(const WebKit::WebString&);
   virtual WebKit::WebString preferredExtensionForMIMEType(
       const WebKit::WebString&);
 
  private:
 
   class FileUtilities;
   scoped_ptr<FileUtilities> file_utilities_;
   scoped_ptr<WebKit::WebBlobRegistry> blob_registry_;
   scoped_ptr<WebFileSystemImpl> web_file_system_;
   scoped_ptr<WebKit::WebIDBFactory> web_idb_factory_;
   scoped_refptr<ThreadSafeSender> thread_safe_sender_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_WORKER_WORKER_WEBKITPLATFORMSUPPORT_IMPL_H_