VideoTrackAdapter: Add passing frames monitor, notify MSVCS -> MSVTrack(s)

content/renderer/media/media_stream_track.cc

Index: content/renderer/media/media_stream_track.cc
diff --git a/content/renderer/media/media_stream_track.cc b/content/renderer/media/media_stream_track.cc
index 529bc384e894be95dbe6b39a37286e25e296566d..9aca963af4f47bd57b38834975700a256ce964fd 100644
--- a/content/renderer/media/media_stream_track.cc
+++ b/content/renderer/media/media_stream_track.cc
@@ -20,18 +20,31 @@ MediaStreamTrack* MediaStreamTrack::GetTrack(
 MediaStreamTrack::MediaStreamTrack(
     webrtc::MediaStreamTrackInterface* track, bool is_local_track)
     : track_(track),
-      is_local_track_(is_local_track) {
+      muted_state_(false),
+      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
@@ -41,6 +54,7 @@ void MediaStreamTrack::Stop() {
 }
 
 webrtc::AudioTrackInterface* MediaStreamTrack::GetAudioAdapter() {
+  DCHECK(thread_checker_.CalledOnValidThread());
   return static_cast<webrtc::AudioTrackInterface*>(track_.get());
 }