Removes tracking for fake audio streams.

media/audio/fake_audio_output_stream.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.
 
 #ifndef MEDIA_AUDIO_FAKE_AUDIO_OUTPUT_STREAM_H_
 #define MEDIA_AUDIO_FAKE_AUDIO_OUTPUT_STREAM_H_
 
 #include <memory>
 
 #include "base/macros.h"
 #include "media/audio/audio_io.h"
 #include "media/audio/fake_audio_worker.h"
 #include "media/base/audio_parameters.h"
 
 namespace media {
 
-class AudioManagerBase;
-
 // A fake implementation of AudioOutputStream.  Used for testing and when a real
 // audio output device is unavailable or refusing output (e.g. remote desktop).
 // Callbacks are driven on the AudioManager's message loop.
 class MEDIA_EXPORT FakeAudioOutputStream : public AudioOutputStream {
  public:
-  static AudioOutputStream* MakeFakeStream(AudioManagerBase* manager,
-                                           const AudioParameters& params);
+  static AudioOutputStream* MakeFakeStream(
+      const scoped_refptr<base::SingleThreadTaskRunner>& audio_task_runner,
+      const scoped_refptr<base::SingleThreadTaskRunner>& worker_task_runner,
+      const AudioParameters& params);
 
   // AudioOutputStream implementation.
   bool Open() override;
   void Start(AudioSourceCallback* callback) override;
   void Stop() override;
   void SetVolume(double volume) override;
   void GetVolume(double* volume) override;
   void Close() override;
 
  private:
-  FakeAudioOutputStream(AudioManagerBase* manager,
-                        const AudioParameters& params);
+  FakeAudioOutputStream(
+      const scoped_refptr<base::SingleThreadTaskRunner>& audio_task_runner,
+      const scoped_refptr<base::SingleThreadTaskRunner>& worker_task_runner,
+      const AudioParameters& params);
   ~FakeAudioOutputStream() override;
 
   // Task that periodically calls OnMoreData() to consume audio data.
   void CallOnMoreData();
 
-  AudioManagerBase* audio_manager_;
   AudioSourceCallback* callback_;
   FakeAudioWorker fake_worker_;
+  const scoped_refptr<base::SingleThreadTaskRunner> audio_task_runner_;
+  const scoped_refptr<base::SingleThreadTaskRunner> worker_task_runner_;
   std::unique_ptr<AudioBus> audio_bus_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeAudioOutputStream);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_FAKE_AUDIO_OUTPUT_STREAM_H_