Implement disabling and enabling media tracks

chromecast/renderer/media/cma_renderer.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 "chromecast/renderer/media/cma_renderer.h"
 
 #include <algorithm>
 #include <utility>
 #include <vector>
 
@@ skipping 154 matching lines @@
   received_audio_eos_ = false;
   received_video_eos_ = false;
 
   DCHECK_EQ(state_, kFlushed) << state_;
   // Immediately update transition to playing.
   // Error case will be handled on response from host.
   media_pipeline_->StartPlayingFrom(time);
   CompleteStateTransition(kPlaying);
 }
 
+void CmaRenderer::RestartStreamPlayback(::media::DemuxerStream* stream,
+                                        base::TimeDelta time) {
+  NOTIMPLEMENTED();
+}
+
 void CmaRenderer::SetPlaybackRate(double playback_rate) {
   CMALOG(kLogControl) << __FUNCTION__ << ": " << playback_rate;
   DCHECK(thread_checker_.CalledOnValidThread());
   media_pipeline_->SetPlaybackRate(playback_rate);
   playback_rate_ = playback_rate;
 
   {
     base::AutoLock auto_lock(time_interpolator_lock_);
     time_interpolator_->SetPlaybackRate(playback_rate);
   }
@@ skipping 265 matching lines @@
   is_pending_transition_ = true;
 }
 
 void CmaRenderer::CompleteStateTransition(State new_state) {
   state_ = new_state;
   is_pending_transition_ = false;
 }
 
 }  // namespace media
 }  // namespace chromecast