Part 1: Plumb render view ID to render host

content/renderer/media/webrtc_audio_device_impl.cc

Index: content/renderer/media/webrtc_audio_device_impl.cc
diff --git a/content/renderer/media/webrtc_audio_device_impl.cc b/content/renderer/media/webrtc_audio_device_impl.cc
index c3ef160808f2464e57b69a3b5d71614943463d98..3f836e1c2d793062f14a6f32699cc75278cdbf1a 100644
--- a/content/renderer/media/webrtc_audio_device_impl.cc
+++ b/content/renderer/media/webrtc_audio_device_impl.cc
@@ -128,7 +128,7 @@ static void AddHistogramFramesPerBuffer(HistogramDirection dir, int param) {
   }
 }
 
-WebRtcAudioDeviceImpl::WebRtcAudioDeviceImpl()
+WebRtcAudioDeviceImpl::WebRtcAudioDeviceImpl(int render_view_id)
     : ref_count_(0),
       render_loop_(base::MessageLoopProxy::current()),
       audio_transport_callback_(NULL),
@@ -147,7 +147,7 @@ WebRtcAudioDeviceImpl::WebRtcAudioDeviceImpl()
   // input side as well.
   DCHECK(RenderThreadImpl::current()) <<
       "WebRtcAudioDeviceImpl must be constructed on the render thread";
-  audio_output_device_ = AudioDeviceFactory::NewOutputDevice();
+  audio_output_device_ = AudioDeviceFactory::NewOutputDevice(render_view_id);
   DCHECK(audio_output_device_);
 }