Implement AudioOutputProxy.

media/audio/audio_manager_base.h

 // Copyright (c) 2010 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 MEDIA_AUDIO_AUDIO_MANAGER_BASE_H_
 #define MEDIA_AUDIO_AUDIO_MANAGER_BASE_H_
 
+#include <map>
+
 #include "base/thread.h"
 #include "media/audio/audio_manager.h"
 
+class AudioOutputDispatcher;
+
 // AudioManagerBase provides AudioManager functions common for all platforms.
 class AudioManagerBase : public AudioManager {
  public:
   AudioManagerBase();
 
   virtual void Init();
 
   virtual MessageLoop* GetMessageLoop();
 
   virtual string16 GetAudioInputDeviceModel();
 
+  virtual AudioOutputStream* MakeAudioOutputStreamProxy(
+      const AudioParameters& params);
+
  protected:
-  virtual ~AudioManagerBase() {}
+  virtual ~AudioManagerBase();
+
+  typedef std::map<AudioParameters, scoped_refptr<AudioOutputDispatcher>,
+                   AudioParameters::Compare>
+      AudioOutputDispatchersMap;
 
   bool initialized() { return initialized_; }
 
   // Thread used to interact with AudioOutputStreams created by this
   // audio manger.
   base::Thread audio_thread_;
 
   bool initialized_;
 
+  AudioOutputDispatchersMap output_dispatchers_;
+
   DISALLOW_COPY_AND_ASSIGN(AudioManagerBase);
 };
 
 #endif  // MEDIA_AUDIO_AUDIO_MANAGER_BASE_H_