Remove the AudioManager singleton.

media/filters/reference_audio_renderer.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 MEDIA_FILTERS_REFERENCE_AUDIO_RENDERER_H_
 #define MEDIA_FILTERS_REFERENCE_AUDIO_RENDERER_H_
 
 // This is the reference implementation of AudioRenderer, which uses the audio
 // interfaces to open an audio device.  It cannot be used in the sandbox, but is
 // used in other applications such as the test player.
 //
 // Note: THIS IS NOT THE AUDIO RENDERER USED IN CHROME.
 //
 // See src/content/renderer/media/audio_renderer_impl.h for chrome's
 // implementation.
 
 #include "media/audio/audio_output_controller.h"
 #include "media/filters/audio_renderer_base.h"
 
+class AudioManager;
+
 namespace media {
 
 class MEDIA_EXPORT ReferenceAudioRenderer
     : public AudioRendererBase,
       public AudioOutputController::EventHandler {
  public:
-  ReferenceAudioRenderer();
+  explicit ReferenceAudioRenderer(AudioManager* audio_manager);
   virtual ~ReferenceAudioRenderer();
 
   // Filter implementation.
   virtual void SetPlaybackRate(float playback_rate) OVERRIDE;
 
   // AudioRenderer implementation.
   virtual void SetVolume(float volume) OVERRIDE;
 
   // AudioController::EventHandler implementation.
   virtual void OnCreated(AudioOutputController* controller) OVERRIDE;
   virtual void OnPlaying(AudioOutputController* controller) OVERRIDE;
   virtual void OnPaused(AudioOutputController* controller) OVERRIDE;
   virtual void OnError(AudioOutputController* controller,
                        int error_code) OVERRIDE;
   virtual void OnMoreData(AudioOutputController* controller,
                           AudioBuffersState buffers_state) OVERRIDE;
 
  protected:
   // AudioRendererBase implementation.
   virtual bool OnInitialize(int bits_per_channel,
                             ChannelLayout channel_layout,
                             int sample_rate) OVERRIDE;
   virtual void OnStop() OVERRIDE;
 
  private:
-  int bytes_per_second_;
-
   // AudioOutputController::Close callback.
   virtual void OnClose();
 
+  scoped_refptr<AudioManager> audio_manager_;
+  int bytes_per_second_;
+
   // Audio output controller.
   scoped_refptr<media::AudioOutputController> controller_;
 
   // Audio buffer.
   int buffer_capacity_;
   scoped_array<uint8> buffer_;
 
   DISALLOW_COPY_AND_ASSIGN(ReferenceAudioRenderer);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_REFERENCE_AUDIO_RENDERER_H_