Refactor MediaStreamTrack video onmute event.

content/renderer/media/media_stream_track.cc

 // 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.
 
 #include "content/renderer/media/media_stream_track.h"
 
 #include "base/logging.h"
 #include "third_party/WebKit/public/platform/WebMediaStreamSource.h"
 #include "third_party/libjingle/source/talk/app/webrtc/mediastreaminterface.h"
 
 namespace content {
 
 MediaStreamTrack* MediaStreamTrack::GetTrack(
     const blink::WebMediaStreamTrack& track) {
   if (track.isNull())
     return NULL;
   return static_cast<MediaStreamTrack*>(track.extraData());
 }
 
 MediaStreamTrack::MediaStreamTrack(
     webrtc::MediaStreamTrackInterface* track, bool is_local_track)
     : track_(track),
-      muted_state_(false),
-      is_local_track_(is_local_track){
+      is_local_track_(is_local_track) {
 }
 
 MediaStreamTrack::~MediaStreamTrack() {
 }
 
 void MediaStreamTrack::SetEnabled(bool enabled) {
   DCHECK(thread_checker_.CalledOnValidThread());
   if (track_)
     track_->set_enabled(enabled);
 }
 
-void MediaStreamTrack::SetMutedState(bool muted_state) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  muted_state_ = muted_state;
-}
-
-bool MediaStreamTrack::GetMutedState(void) const {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  return muted_state_;
-}
-
 void MediaStreamTrack::Stop() {
   DCHECK(thread_checker_.CalledOnValidThread());
   // Stop means that a track should be stopped permanently. But
   // since there is no proper way of doing that on a remote track, we can
   // at least disable the track. Blink will not call down to the content layer
   // after a track has been stopped.
   if (track_)
     track_->set_enabled(false);
 }
 
 webrtc::AudioTrackInterface* MediaStreamTrack::GetAudioAdapter() {
   DCHECK(thread_checker_.CalledOnValidThread());
   return static_cast<webrtc::AudioTrackInterface*>(track_.get());
 }
 
 }  // namespace content