Plumb render view ID to media observer

content/renderer/media/webrtc_audio_device_impl.h

Index: content/renderer/media/webrtc_audio_device_impl.h
diff --git a/content/renderer/media/webrtc_audio_device_impl.h b/content/renderer/media/webrtc_audio_device_impl.h
index 5b923f1e9167aedd7dbf579bbe48bead705fa5ce..52736ef207dd94d752985d476c15e1cd422cc015 100644
--- a/content/renderer/media/webrtc_audio_device_impl.h
+++ b/content/renderer/media/webrtc_audio_device_impl.h
@@ -19,6 +19,10 @@
 #include "media/base/audio_renderer_sink.h"
 #include "third_party/webrtc/modules/audio_device/main/interface/audio_device.h"
 
+namespace content {
+class RenderView;
+}
+
 // A WebRtcAudioDeviceImpl instance implements the abstract interface
 // webrtc::AudioDeviceModule which makes it possible for a user (e.g. webrtc::
 // VoiceEngine) to register this class as an external AudioDeviceModule (ADM).
@@ -208,7 +212,7 @@ class CONTENT_EXPORT WebRtcAudioDeviceImpl
       public AudioInputDevice::CaptureEventHandler {
  public:
   // Methods called on main render thread.
-  WebRtcAudioDeviceImpl();
+  WebRtcAudioDeviceImpl(content::RenderView* render_view);
 
   // webrtc::RefCountedModule implementation.
   // The creator must call AddRef() after construction and use Release()