Make WebRtcVideoChannel2::WebRtcVideoSendStream implement rtc::VideoRendererInterface.

talk/app/webrtc/videotrack.h

Index: talk/app/webrtc/videotrack.h
diff --git a/talk/app/webrtc/videotrack.h b/talk/app/webrtc/videotrack.h
index 67a216361514da899a2fc9cd6e1ac32c4b9e3dee..8c70830d1aa2fed34c3ea22aeb4313eec9a0a59a 100644
--- a/talk/app/webrtc/videotrack.h
+++ b/talk/app/webrtc/videotrack.h
@@ -42,8 +42,9 @@ class VideoTrack : public MediaStreamTrack<VideoTrackInterface> {
   static rtc::scoped_refptr<VideoTrack> Create(
       const std::string& label, VideoSourceInterface* source);
 
-  virtual void AddRenderer(VideoRendererInterface* renderer);
-  virtual void RemoveRenderer(VideoRendererInterface* renderer);
+  virtual void AddSink(rtc::VideoSinkInterface<cricket::VideoFrame>* sink);
+  virtual void RemoveSink(rtc::VideoSinkInterface<cricket::VideoFrame>* sink);
+
   virtual VideoSourceInterface* GetSource() const {
     return video_source_.get();
   }
@@ -55,7 +56,7 @@ class VideoTrack : public MediaStreamTrack<VideoTrackInterface> {
   ~VideoTrack();
 
  private:
-  VideoTrackRenderers renderers_;
+  VideoTrackRenderers sinks_;
   rtc::scoped_refptr<VideoSourceInterface> video_source_;
 };