Implement disabling and enabling media tracks

media/base/mock_filters.h

Index: media/base/mock_filters.h
diff --git a/media/base/mock_filters.h b/media/base/mock_filters.h
index 0e2a11e325bb8020f0baf87d20a554f4a057ecff..af07f85e76c55f4a3cdd050117e4ab92aac9fc29 100644
--- a/media/base/mock_filters.h
+++ b/media/base/mock_filters.h
@@ -67,6 +67,8 @@ class MockPipeline : public Pipeline {
                     Client*,
                     const PipelineStatusCB&));
   MOCK_METHOD0(Stop, void());
+  MOCK_METHOD2(RestartStreamPlayback,
+               void(DemuxerStream* stream, base::TimeDelta time));
   MOCK_METHOD2(Seek, void(base::TimeDelta, const PipelineStatusCB&));
   MOCK_METHOD1(Suspend, void(const PipelineStatusCB&));
   MOCK_METHOD3(Resume,
@@ -151,6 +153,8 @@ class MockDemuxerStream : public DemuxerStream {
   void set_liveness(Liveness liveness);
 
   VideoRotation video_rotation() override;
+  MOCK_CONST_METHOD0(enabled, bool());
+  MOCK_METHOD2(set_enabled, void(bool, base::TimeDelta));
 
  private:
   Type type_;
@@ -272,6 +276,8 @@ class MockRenderer : public Renderer {
                     const PipelineStatusCB& init_cb));
   MOCK_METHOD1(Flush, void(const base::Closure& flush_cb));
   MOCK_METHOD1(StartPlayingFrom, void(base::TimeDelta timestamp));
+  MOCK_METHOD2(RestartStreamPlayback,
+               void(DemuxerStream* stream, base::TimeDelta time));
   MOCK_METHOD1(SetPlaybackRate, void(double playback_rate));
   MOCK_METHOD1(SetVolume, void(float volume));
   MOCK_METHOD0(GetMediaTime, base::TimeDelta());