Use base::MessageLoopProxy instead of MessageLoop* in webkit/media/.

webkit/media/webmediaplayer_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.
 
 // Delegate calls from WebCore::MediaPlayerPrivate to Chrome's video player.
 // It contains Pipeline which is the actual media player pipeline, it glues
 // the media player pipeline, data source, audio renderer and renderer.
 // Pipeline would creates multiple threads and access some public methods
 // of this class, so we need to be extra careful about concurrent access of
 // methods and members.
@@ skipping 54 matching lines @@
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebMediaPlayerClient.h"
 #include "webkit/media/crypto/key_systems.h"
 #include "webkit/media/crypto/proxy_decryptor.h"
 
 class RenderAudioSourceProvider;
 
 namespace WebKit {
 class WebFrame;
 }
 
+namespace base {
+class MessageLoopProxy;
+}
+
 namespace media {
 class ChunkDemuxer;
 class MediaLog;
 }
 
 namespace webkit_media {
 
 class MediaStreamClient;
 class WebAudioSourceProviderImpl;
 class WebMediaPlayerDelegate;
@@ skipping 190 matching lines @@
 
   WebKit::WebFrame* frame_;
 
   // TODO(hclam): get rid of these members and read from the pipeline directly.
   WebKit::WebMediaPlayer::NetworkState network_state_;
   WebKit::WebMediaPlayer::ReadyState ready_state_;
 
   // Keep a list of buffered time ranges.
   WebKit::WebTimeRanges buffered_;
 
-  // Message loops for posting tasks between Chrome's main thread. Also used
+  // Message loops for posting tasks on Chrome's main thread. Also used
   // for DCHECKs so methods calls won't execute in the wrong thread.
-  MessageLoop* main_loop_;
+  scoped_refptr<base::MessageLoopProxy> main_loop_;
 
   scoped_ptr<media::FilterCollection> filter_collection_;
   scoped_refptr<media::Pipeline> pipeline_;
   base::Thread media_thread_;
 
   // The currently selected key system. Empty string means that no key system
   // has been selected.
   WebKit::WebString current_key_system_;
 
   // Playback state.
@@ skipping 50 matching lines @@
   // Temporary for EME v0.1. In the future the init data type should be passed
   // through GenerateKeyRequest() directly from WebKit.
   std::string init_data_type_;
 
   DISALLOW_COPY_AND_ASSIGN(WebMediaPlayerImpl);
 };
 
 }  // namespace webkit_media
 
 #endif  // WEBKIT_MEDIA_WEBMEDIAPLAYER_IMPL_H_