Propagate MediaStreamSource state to video tracks the same way as audio.

webrtc/api/rtpreceiver.cc

 /*
  *  Copyright 2015 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 63 matching lines @@
     : id_(track_id),
       ssrc_(ssrc),
       provider_(provider),
       source_(new RefCountedObject<VideoTrackSource>(&broadcaster_,
                                                      worker_thread,
                                                      true /* remote */)),
       track_(VideoTrackProxy::Create(
           rtc::Thread::Current(),
           VideoTrack::Create(track_id, source_.get()))) {
   source_->SetState(MediaSourceInterface::kLive);
-  // TODO(perkj): It should be enough to set the source state. All tracks
-  // belonging to the same source should get its state from the source.
-  // I.e. if a track has been cloned from a remote source.
-  track_->set_state(webrtc::MediaStreamTrackInterface::kLive);
   provider_->SetVideoPlayout(ssrc_, true, &broadcaster_);
   stream->AddTrack(track_);
 }
 
 VideoRtpReceiver::~VideoRtpReceiver() {
   // Since cricket::VideoRenderer is not reference counted,
   // we need to remove it from the provider before we are deleted.
   Stop();
 }
 
 void VideoRtpReceiver::Stop() {
   // TODO(deadbeef): Need to do more here to fully stop receiving packets.
   if (!provider_) {
     return;
   }
   source_->SetState(MediaSourceInterface::kEnded);
   source_->OnSourceDestroyed();
-  // TODO(perkj): It should be enough to set the source state. All tracks
-  // belonging to the same source should get its state from the source.
-  track_->set_state(MediaStreamTrackInterface::kEnded);
   provider_->SetVideoPlayout(ssrc_, false, nullptr);
   provider_ = nullptr;
 }
 
 }  // namespace webrtc