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

webrtc/api/audiotrack.cc

 /*
  *  Copyright 2011 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 47 matching lines @@
 }
 
 void AudioTrack::RemoveSink(AudioTrackSinkInterface* sink) {
   RTC_DCHECK(thread_checker_.CalledOnValidThread());
   if (audio_source_)
     audio_source_->RemoveSink(sink);
 }
 
 void AudioTrack::OnChanged() {
   RTC_DCHECK(thread_checker_.CalledOnValidThread());
-  if (state() == kFailed)
-    return;  // We can't recover from this state (do we ever set it?).
-
-  TrackState new_state = kInitializing;
-
-  // |audio_source_| must be non-null if we ever get here.
-  switch (audio_source_->state()) {
-    case MediaSourceInterface::kLive:
-    case MediaSourceInterface::kMuted:
-      new_state = kLive;
-      break;
-    case MediaSourceInterface::kEnded:
-      new_state = kEnded;
-      break;
-    case MediaSourceInterface::kInitializing:
-    default:
-      // use kInitializing.
-      break;
+  if (audio_source_->state() == MediaSourceInterface::kEnded) {
+    set_state(kEnded);
+  } else {
+    set_state(kLive);
   }
-
-  set_state(new_state);
 }
 
 }  // namespace webrtc