Stop source and fire MediaStreamTrack ended event if missing audio input callbacks are detected.

content/renderer/media/local_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/local_media_stream_audio_source.h"
 
 #include "content/common/media/media_stream_options.h"
 #include "content/renderer/media/audio_device_factory.h"
+#include "content/renderer/media/webrtc_logging.h"
 #include "content/renderer/render_frame_impl.h"
 
 namespace content {
 
 LocalMediaStreamAudioSource::LocalMediaStreamAudioSource(
     int consumer_render_frame_id,
     const StreamDeviceInfo& device_info,
     const ConstraintsCallback& started_callback)
     : MediaStreamAudioSource(true /* is_local_source */),
       consumer_render_frame_id_(consumer_render_frame_id),
@@ skipping 79 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 LocalMediaStreamAudioSource::OnCaptureError(const std::string& why) {
+  WebRtcLogMessage("LocalMediaStreamAudioSource::OnCaptureError: " + why);
   StopSourceOnError(why);
 }
 
 }  // namespace content