Part 1: Plumb render view ID to render host

content/browser/renderer_host/media/audio_renderer_host.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // AudioRendererHost serves audio related requests from AudioRenderer which
 // lives inside the render process and provide access to audio hardware.
 //
 // This class is owned by BrowserRenderProcessHost, and instantiated on UI
 // thread, but all other operations and method calls happen on IO thread, so we
 // need to be extra careful about the lifetime of this object. AudioManager is a
@@ skipping 104 matching lines @@
   FRIEND_TEST_ALL_PREFIXES(AudioRendererHostTest, MockStreamDataConversation);
 
   virtual ~AudioRendererHost();
 
   // Methods called on IO thread ----------------------------------------------
 
   // Audio related IPC message handlers.
   // 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);
+  void OnPlayStream(int render_view_id, int stream_id);

[tommi (sloooow) - chröme, 2012/07/31 10:52:41]

just including the render view id in OnCreateStream should be enough and just
store it with the AudioEntry.

[sail, 2012/07/31 22:02:08]

Done.

 
   // Pause the audio stream referenced by |stream_id|.
-  void OnPauseStream(int stream_id);
+  void OnPauseStream(int render_view_id, int stream_id);
 
   // Discard all audio data in stream referenced by |stream_id|.
-  void OnFlushStream(int stream_id);
+  void OnFlushStream(int render_view_id, int stream_id);
 
   // Close the audio stream referenced by |stream_id|.
-  void OnCloseStream(int stream_id);
+  void OnCloseStream(int render_view_id, int stream_id);
 
   // Set the volume of the audio stream referenced by |stream_id|.
-  void OnSetVolume(int stream_id, double volume);
+  void OnSetVolume(int render_view_id, int stream_id, double volume);
 
   // Complete the process of creating an audio stream. This will set up the
   // shared memory or shared socket in low latency mode.
   void DoCompleteCreation(media::AudioOutputController* controller);
 
   // Send a state change message to the renderer.
   void DoSendPlayingMessage(media::AudioOutputController* controller);
   void DoSendPausedMessage(media::AudioOutputController* controller);
 
   // Handle error coming from audio stream.
@@ skipping 28 matching lines @@
   // A map of stream IDs to audio sources.
   AudioEntryMap audio_entries_;
 
   media::AudioManager* audio_manager_;
   content::MediaObserver* media_observer_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioRendererHost);
 };
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_RENDERER_HOST_H_