Cast: deliver video frames on the IO thread

content/renderer/media/webrtc/webrtc_video_track_adapter.h

 // Copyright 2014 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_WEBRTC_WEBRTC_VIDEO_TRACK_ADAPTER_H_
 #define CONTENT_RENDERER_MEDIA_WEBRTC_WEBRTC_VIDEO_TRACK_ADAPTER_H_
 
 #include "base/macros.h"
 #include "base/threading/thread_checker.h"
-#include "content/public/renderer/media_stream_sink.h"
+#include "content/public/renderer/media_stream_video_sink.h"
 #include "content/renderer/media/media_stream_dependency_factory.h"
 #include "content/renderer/media/webrtc/webrtc_video_capturer_adapter.h"
 #include "third_party/WebKit/public/platform/WebMediaStreamTrack.h"
 #include "third_party/libjingle/source/talk/app/webrtc/mediastreaminterface.h"
 #include "third_party/libjingle/source/talk/app/webrtc/videosourceinterface.h"
 
 namespace content {
 
 class MediaStreamVideoTrack;
 
 // WebRtcVideoTrackAdapter is an adapter between a
 // content::MediaStreamVideoTrack object and a webrtc VideoTrack that is
 // currently sent on a PeerConnection.
 // The responsibility of the class is to create and own a representation of a
 // webrtc VideoTrack that can be added and removed from a RTCPeerConnection.
 // An instance of WebRtcVideoTrackAdapter is created when a VideoTrack is
 // added to an RTCPeerConnection object.
 // Instances of this class is owned by the WebRtcMediaStreamAdapter object that
 // created it.
-class WebRtcVideoTrackAdapter : public MediaStreamSink {
+class WebRtcVideoTrackAdapter : public MediaStreamVideoSink {
  public:
   WebRtcVideoTrackAdapter(const blink::WebMediaStreamTrack& track,
                           MediaStreamDependencyFactory* factory);
   virtual ~WebRtcVideoTrackAdapter();
 
   webrtc::VideoTrackInterface* webrtc_video_track() {
     return video_track_.get();
   }
 
  protected:
   // Implementation of MediaStreamSink.
   virtual void OnEnabledChanged(bool enabled) OVERRIDE;
 
  private:
   // Used to DCHECK that we are called on the correct thread.
   base::ThreadChecker thread_checker_;
 
   scoped_refptr<webrtc::VideoTrackInterface> video_track_;
   blink::WebMediaStreamTrack web_track_;
 
   class WebRtcVideoSourceAdapter;
   scoped_refptr<WebRtcVideoSourceAdapter> source_adapter_;
 
   DISALLOW_COPY_AND_ASSIGN(WebRtcVideoTrackAdapter);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_WEBRTC_WEBRTC_VIDEO_TRACK_ADAPTER_H_