Part 1: Plumb render view ID to render host

content/browser/renderer_host/media/audio_renderer_host.h

Index: content/browser/renderer_host/media/audio_renderer_host.h
diff --git a/content/browser/renderer_host/media/audio_renderer_host.h b/content/browser/renderer_host/media/audio_renderer_host.h
index f9a650feb792790f51c4ad855481f408a5a9cd9f..491e6cecb5c09984f8679b308a45d984075deefc 100644
--- a/content/browser/renderer_host/media/audio_renderer_host.h
+++ b/content/browser/renderer_host/media/audio_renderer_host.h
@@ -122,7 +122,9 @@ class CONTENT_EXPORT AudioRendererHost
   // Creates an audio output stream with the specified format. If this call is
   // successful this object would keep an internal entry of the stream for the
   // required properties.
-  void OnCreateStream(int stream_id, const media::AudioParameters& params);
+  void OnCreateStream(int render_view_id,
+                      int stream_id,
+                      const media::AudioParameters& params);
 
   // Play the audio stream referenced by |stream_id|.
   void OnPlayStream(int stream_id);