Removes tracking for fake audio streams.

media/audio/fake_audio_output_stream.h

Index: media/audio/fake_audio_output_stream.h
diff --git a/media/audio/fake_audio_output_stream.h b/media/audio/fake_audio_output_stream.h
index d4a9adec9562c67c28f389b1de121a86b2212cdd..feaf5d14e934dec86c55ad611e13eecbdc6a7efc 100644
--- a/media/audio/fake_audio_output_stream.h
+++ b/media/audio/fake_audio_output_stream.h
@@ -14,15 +14,15 @@
 
 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;
@@ -33,16 +33,19 @@ class MEDIA_EXPORT FakeAudioOutputStream : public AudioOutputStream {
   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);