Stop media stream source when audio capture error occurs.

content/renderer/media/external_media_stream_audio_source.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/media/external_media_stream_audio_source.h"
 
 namespace content {
 
 ExternalMediaStreamAudioSource::ExternalMediaStreamAudioSource(
     scoped_refptr<media::AudioCapturerSource> source,
@@ skipping 54 matching lines @@
   // TODO(miu): Plumbing is needed to determine the actual capture timestamp
   // of the audio, instead of just snapshotting TimeTicks::Now(), for proper
   // audio/video sync. http://crbug.com/335335
   MediaStreamAudioSource::DeliverDataToTracks(
       *audio_bus,
       base::TimeTicks::Now() -
           base::TimeDelta::FromMilliseconds(audio_delay_milliseconds));
 }
 
 void ExternalMediaStreamAudioSource::OnCaptureError(const std::string& why) {
-  // As of this writing, this method doesn't get called for anything useful,
-  // and all other implementors just log the message, but don't disconnect sinks
-  // or take any other action. So, just log the error.
-  LOG(ERROR) << why;
+  StopSourceOnError(why);
 }
 
 }  // namespace content