Implement disabling and enabling media tracks

media/base/fake_text_track_stream.cc

Index: media/base/fake_text_track_stream.cc
diff --git a/media/base/fake_text_track_stream.cc b/media/base/fake_text_track_stream.cc
index 5d830db24bc32de339a1e9b80a9dc662926374e0..c0a8ae48b1d02979ed77dddd3d794ead1fc941bf 100644
--- a/media/base/fake_text_track_stream.cc
+++ b/media/base/fake_text_track_stream.cc
@@ -46,6 +46,18 @@ VideoRotation FakeTextTrackStream::video_rotation() {
   return VIDEO_ROTATION_0;
 }
 
+bool FakeTextTrackStream::enabled() const {
+  return true;
+}
+
+void FakeTextTrackStream::set_enabled(bool enabled, base::TimeDelta timestamp) {
+  NOTIMPLEMENTED();
+}
+
+void FakeTextTrackStream::SetStreamRestartedCB(const StreamRestartedCB& cb) {
+  NOTIMPLEMENTED();
+}
+
 void FakeTextTrackStream::SatisfyPendingRead(
     const base::TimeDelta& start,
     const base::TimeDelta& duration,