Plumb render view ID to media observer

content/renderer/media/audio_device_factory.h

Index: content/renderer/media/audio_device_factory.h
diff --git a/content/renderer/media/audio_device_factory.h b/content/renderer/media/audio_device_factory.h
index b15e96701c94e67eb3c232d4361dbc9139a307ad..4b97b17f7d24d7ca592c5784fa743ae9c832e3fc 100644
--- a/content/renderer/media/audio_device_factory.h
+++ b/content/renderer/media/audio_device_factory.h
@@ -8,6 +8,10 @@
 #include "base/basictypes.h"
 #include "content/common/content_export.h"
 
+namespace content {
+class RenderView;
+}
+
 namespace media {
 class AudioRendererSink;
 }
@@ -23,7 +27,7 @@ class CONTENT_EXPORT AudioDeviceFactory {
   // Creates an AudioRendererSink using the currently registered factory,
   // or the default one if no factory is registered. Ownership of the returned
   // pointer will be passed to the caller.
- static media::AudioRendererSink* Create();
+ static media::AudioRendererSink* Create(RenderView* render_view);
 
  protected:
   AudioDeviceFactory();