Make RendererGpuVideoDecoderFactories live on arbitrary threads.

content/renderer/media/media_stream_dependency_factory.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_RENDERER_MEDIA_MEDIA_STREAM_DEPENDENCY_FACTORY_H_
 #define CONTENT_RENDERER_MEDIA_MEDIA_STREAM_DEPENDENCY_FACTORY_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
+#include "base/message_loop/message_loop_proxy.h"

[scherkus (not reviewing), 2013/07/19 18:13:58]

AFAIK you can fwd decl vs include

you may also be able to get rid of |media_loop_proxy_| -- see my comment in .cc

[wuchengli, 2013/07/20 06:04:14]

Done.

 #include "base/threading/thread.h"
 #include "content/common/content_export.h"
 #include "content/renderer/media/media_stream_extra_data.h"
 #include "content/renderer/p2p/socket_dispatcher.h"
 #include "third_party/libjingle/source/talk/app/webrtc/peerconnectioninterface.h"
 #include "third_party/libjingle/source/talk/app/webrtc/videosourceinterface.h"
 
 namespace base {
 class WaitableEvent;
 }
@@ skipping 32 matching lines @@
 
 // Object factory for RTC MediaStreams and RTC PeerConnections.
 class CONTENT_EXPORT MediaStreamDependencyFactory
     : NON_EXPORTED_BASE(public base::NonThreadSafe) {
  public:
   // MediaSourcesCreatedCallback is used in CreateNativeMediaSources.
   typedef base::Callback<void(WebKit::WebMediaStream* description,
                               bool live)> MediaSourcesCreatedCallback;
   MediaStreamDependencyFactory(
       VideoCaptureImplManager* vc_manager,
-      P2PSocketDispatcher* p2p_socket_dispatcher);
+      P2PSocketDispatcher* p2p_socket_dispatcher,
+      const scoped_refptr<base::MessageLoopProxy>& media_loop_proxy);
   virtual ~MediaStreamDependencyFactory();
 
   // Create a RTCPeerConnectionHandler object that implements the
   // WebKit WebRTCPeerConnectionHandler interface.
   WebKit::WebRTCPeerConnectionHandler* CreateRTCPeerConnectionHandler(
       WebKit::WebRTCPeerConnectionHandlerClient* client);
 
   // CreateNativeMediaSources creates libjingle representations of
   // the underlying sources to the tracks in |description|.
   // |sources_created| is invoked when the sources have either been created and
@@ skipping 149 matching lines @@
   scoped_refptr<VideoCaptureImplManager> vc_manager_;
   scoped_refptr<P2PSocketDispatcher> p2p_socket_dispatcher_;
   scoped_refptr<WebRtcAudioDeviceImpl> audio_device_;
 
   // PeerConnection threads. signaling_thread_ is created from the
   // "current" chrome thread.
   talk_base::Thread* signaling_thread_;
   talk_base::Thread* worker_thread_;
   base::Thread chrome_worker_thread_;
 
+  // Message loop proxy of the media thread.
+  scoped_refptr<base::MessageLoopProxy> media_loop_proxy_;
+
   DISALLOW_COPY_AND_ASSIGN(MediaStreamDependencyFactory);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_MEDIA_STREAM_DEPENDENCY_FACTORY_H_