Revert 57254 - Share one thread between all AudioOutputControllers instead of...

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 "base/thread.h"
-#include "media/audio/audio_manager.h"
-
-// AudioManagerBase provides AudioManager functions common for all platforms.
-class AudioManagerBase : public AudioManager {
- public:
-  AudioManagerBase();
-
-  virtual void Init();
-
-  virtual MessageLoop* GetMessageLoop();
-
- protected:
-  virtual ~AudioManagerBase() {}
-
-  bool initialized() { return initialized_; }
-
- protected:
-  // Thread used to interact with AudioOutputStreams created by this
-  // audio manger.
-  base::Thread audio_thread_;
-
-  bool initialized_;
-
-  DISALLOW_COPY_AND_ASSIGN(AudioManagerBase);
-};
-
-#endif  // MEDIA_AUDIO_AUDIO_MANAGER_BASE_H_