Refactor MediaStreamTrack video onmute event.

content/renderer/media/media_stream_track.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_MEDIA_STREAM_TRACK_EXTRA_DATA_H_
-#define CONTENT_RENDERER_MEDIA_MEDIA_STREAM_TRACK_EXTRA_DATA_H_
+#ifndef CONTENT_RENDERER_MEDIA_MEDIA_STREAM_TRACK_H_
+#define CONTENT_RENDERER_MEDIA_MEDIA_STREAM_TRACK_H_
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/threading/thread_checker.h"
 #include "content/common/content_export.h"
 #include "third_party/WebKit/public/platform/WebMediaStreamTrack.h"
 
 namespace webrtc {
 class AudioTrackInterface;
@@ skipping 11 matching lines @@
   MediaStreamTrack(webrtc::MediaStreamTrackInterface* track,
                    bool is_local_track);
   virtual ~MediaStreamTrack();
 
   static MediaStreamTrack* GetTrack(
       const blink::WebMediaStreamTrack& track);
 
   // If a subclass overrides this method it has to call the base class.
   virtual void SetEnabled(bool enabled);
 
-  virtual void SetMutedState(bool muted_state);
-  virtual bool GetMutedState(void) const;
-
   // TODO(xians): Make this pure virtual when Stop[Track] has been
   // implemented for remote audio tracks.
   virtual void Stop();
 
   virtual webrtc::AudioTrackInterface* GetAudioAdapter();
 
   bool is_local_track () const { return is_local_track_; }
 
  protected:
   scoped_refptr<webrtc::MediaStreamTrackInterface> track_;
 
-  // Set to true if the owner MediaStreamSource is not delivering frames.
-  bool muted_state_;
-
  private:
   const bool is_local_track_;
 
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaStreamTrack);
 };
 
 }  // namespace content
 
-#endif  // CONTENT_RENDERER_MEDIA_MEDIA_STREAM_TRACK_EXTRA_DATA_H_
+#endif  // CONTENT_RENDERER_MEDIA_MEDIA_STREAM_TRACK_H_