Implement disabling and enabling media tracks

media/base/android/media_url_demuxer.cc

Index: media/base/android/media_url_demuxer.cc
diff --git a/media/base/android/media_url_demuxer.cc b/media/base/android/media_url_demuxer.cc
index 7fa7b8d4d748d96705b6e2234414a89ac0885692..d4e23e0aa606ec16465b50755da941c26defe6f0 100644
--- a/media/base/android/media_url_demuxer.cc
+++ b/media/base/android/media_url_demuxer.cc
@@ -64,4 +64,15 @@ int64_t MediaUrlDemuxer::GetMemoryUsage() const {
   return 0;
 }
 
+void MediaUrlDemuxer::OnEnabledAudioTracksChanged(
+    const std::vector<MediaTrack::Id>& track_ids,
+    base::TimeDelta currTime) {
+  NOTIMPLEMENTED();
+}
+void MediaUrlDemuxer::OnSelectedVideoTrackChanged(
+    const std::vector<MediaTrack::Id>& track_ids,
+    base::TimeDelta currTime) {
+  NOTIMPLEMENTED();
+}
+
 }  // namespace media