Cleaned up the WebRtcAudioCapturer a bit.

content/renderer/media/media_stream_impl.cc

Index: content/renderer/media/media_stream_impl.cc
diff --git a/content/renderer/media/media_stream_impl.cc b/content/renderer/media/media_stream_impl.cc
index f659aaf9c93188385bbe257acea278284f1033cc..4a086bfc7bf19771c28862ffc0e67e7e4deb2e2c 100644
--- a/content/renderer/media/media_stream_impl.cc
+++ b/content/renderer/media/media_stream_impl.cc
@@ -730,6 +730,13 @@ void MediaStreamImpl::StopLocalSource(
   if (source.type() == blink::WebMediaStreamSource::TypeAudio) {
     if (extra_data->GetAudioCapturer()) {
       extra_data->GetAudioCapturer()->Stop();
+
+      // Remove the capturer object from the WebRtcAudioDeviceImpl after it
+      // stops.
+      WebRtcAudioDeviceImpl* audio_device =

[perkj_chrome, 2014/01/14 08:42:40]

What is the lifetime of audio_device? How about letting this be internal to
AudioCapturer::Stop.

[no longer working on chromium, 2014/01/14 11:10:21]

Sorry, I just forgot the save the change in this file, these lines of code
should have been removed.

FYI, the audio_device is scoped_ptr owned by the dependency_factory, and it will
go away when the dependency_factory goes away.

+          dependency_factory_->GetWebRtcAudioDevice();
+      if (audio_device)
+        audio_device->RemoveAudioCapturer(extra_data->GetAudioCapturer());
     }
   }
 
@@ -801,19 +808,13 @@ bool MediaStreamImpl::GetAuthorizedDeviceInfoForAudioRenderer(
     int* output_sample_rate,
     int* output_frames_per_buffer) {
   DCHECK(CalledOnValidThread());
-
   WebRtcAudioDeviceImpl* audio_device =
       dependency_factory_->GetWebRtcAudioDevice();
   if (!audio_device)
     return false;
 
-  if (!audio_device->GetDefaultCapturer())
-    return false;
-
-  return audio_device->GetDefaultCapturer()->GetPairedOutputParameters(
-      session_id,
-      output_sample_rate,
-      output_frames_per_buffer);
+  return audio_device->GetAuthorizedDeviceInfoForAudioRenderer(
+      session_id, output_sample_rate, output_frames_per_buffer);
 }
 
 MediaStreamSourceExtraData::MediaStreamSourceExtraData(