Implements AudioMessageFilter as member in RenderThread

chrome/browser/media/media_internals.h

 // Copyright (c) 2011 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.
 
 #ifndef CHROME_BROWSER_MEDIA_MEDIA_INTERNALS_H_
 #define CHROME_BROWSER_MEDIA_MEDIA_INTERNALS_H_
 #pragma once
 
 #include "base/memory/ref_counted.h"
 #include "base/observer_list_threadsafe.h"
 #include "base/values.h"
 #include "content/browser/renderer_host/media/media_observer.h"
 
 class MediaInternalsObserver;
 
 // This class stores information about currently active media.
 class MediaInternals : public MediaObserver {
  public:
   virtual ~MediaInternals();
 
   // MediaObserver implementation. These are called from the IO thread:
-  virtual void OnDeleteAudioStream(void* host, int32 render_view,
-                                   int stream_id);
-  virtual void OnSetAudioStreamPlaying(void* host, int32 render_view,
-                                       int stream_id, bool playing);
-  virtual void OnSetAudioStreamStatus(void* host, int32 render_view,
-                                      int stream_id, const std::string& status);
-  virtual void OnSetAudioStreamVolume(void* host, int32 render_view,
-                                      int stream_id, double volume);
+  virtual void OnDeleteAudioStream(void* host, int stream_id);
+  virtual void OnSetAudioStreamPlaying(void* host, int stream_id, bool playing);
+  virtual void OnSetAudioStreamStatus(void* host, int stream_id,
+                                      const std::string& status);
+  virtual void OnSetAudioStreamVolume(void* host, int stream_id, double volume);
 
   // Methods for observers. Called from the observer's own thread:
   // UIs should add themselves on construction and remove themselves
   // on destruction.
   void AddUI(MediaInternalsObserver* ui);
   void RemoveUI(MediaInternalsObserver* ui);
   void SendEverything();
 
  private:
   friend class IOThread;
   friend class MediaInternalsTest;
 
   MediaInternals();
 
   // Sets |property| of an audio stream to |value| and notifies observers.
-  // (host, render_view, stream_id) is a unique id for the audio stream.
+  // (host, stream_id) is a unique id for the audio stream.
   // |host| will never be dereferenced.
-  void UpdateAudioStream(void* host, int32 render_view, int stream_id,
+  void UpdateAudioStream(void* host, int stream_id,
                          const std::string& property, Value* value);
 
   // Removes |item| from |data_|.
   void DeleteItem(const std::string& item);
 
   // Sets data_.id.property = value and notifies attached UIs using update_fn.
   // id may be any depth, e.g. "video.decoders.1.2.3"
   void UpdateItem(const std::string& update_fn, const std::string& id,
                   const std::string& property, Value* value);
 
   // Calls javascript |function|(|value|) on each attached UI.
   void SendUpdate(const std::string& function, Value* value);
 
   static MediaInternals* instance_;
   DictionaryValue data_;
   scoped_refptr<ObserverListThreadSafe<MediaInternalsObserver> > observers_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaInternals);
 };
 
 #endif  // CHROME_BROWSER_MEDIA_MEDIA_INTERNALS_H_