Removes tracking for fake audio streams.

media/audio/fake_audio_input_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.
 //
 // A fake implementation of AudioInputStream, useful for testing purpose.
 
 #ifndef MEDIA_AUDIO_FAKE_AUDIO_INPUT_STREAM_H_
 #define MEDIA_AUDIO_FAKE_AUDIO_INPUT_STREAM_H_
 
 #include <memory>
 #include <vector>
 
 #include "base/callback_forward.h"
 #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 AudioBus;
-class AudioManagerBase;
 class SimpleSource;
 
 // This class acts as a fake audio input stream. The default is to generate a
 // beeping sound unless --use-file-for-fake-audio-capture=<file> is specified,
 // in which case the indicated .wav file will be read and played into the
 // stream.
 class MEDIA_EXPORT FakeAudioInputStream
     : public AudioInputStream {
  public:
   static AudioInputStream* MakeFakeStream(
-      AudioManagerBase* manager, const AudioParameters& params);
+      const scoped_refptr<base::SingleThreadTaskRunner>& audio_task_runner,
+      const scoped_refptr<base::SingleThreadTaskRunner>& worker_task_runner,
+      const AudioParameters& params);
 
   bool Open() override;
   void Start(AudioInputCallback* callback) override;
   void Stop() override;
   void Close() override;
   double GetMaxVolume() override;
   void SetVolume(double volume) override;
   double GetVolume() override;
   bool IsMuted() override;
   bool SetAutomaticGainControl(bool enabled) override;
   bool GetAutomaticGainControl() override;
 
   // Generate one beep sound. This method is called by FakeVideoCaptureDevice to
   // test audio/video synchronization. This is a static method because
   // FakeVideoCaptureDevice is disconnected from an audio device. This means
   // only one instance of this class gets to respond, which is okay because we
   // assume there's only one stream for this testing purpose. Furthermore this
   // method will do nothing if --use-file-for-fake-audio-capture is specified
   // since the input stream will be playing from a file instead of beeping.
   // TODO(hclam): Make this non-static. To do this we'll need to fix
   // crbug.com/159053 such that video capture device is aware of audio
   // input stream.
   static void BeepOnce();
 
  private:
-  FakeAudioInputStream(AudioManagerBase* manager,
-                       const AudioParameters& params);
+  FakeAudioInputStream(
+      const scoped_refptr<base::SingleThreadTaskRunner>& audio_task_runner,
+      const scoped_refptr<base::SingleThreadTaskRunner>& worker_task_runner,
+      const AudioParameters& params);
   ~FakeAudioInputStream() override;
 
   std::unique_ptr<AudioOutputStream::AudioSourceCallback> ChooseSource();
   void ReadAudioFromSource();
 
-  AudioManagerBase* audio_manager_;
   AudioInputCallback* callback_;
   FakeAudioWorker fake_audio_worker_;
-  AudioParameters params_;
+  const scoped_refptr<base::SingleThreadTaskRunner> audio_task_runner_;
+  const scoped_refptr<base::SingleThreadTaskRunner> worker_task_runner_;
+  const AudioParameters params_;
 
   std::unique_ptr<AudioOutputStream::AudioSourceCallback> audio_source_;
   std::unique_ptr<media::AudioBus> audio_bus_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeAudioInputStream);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_FAKE_AUDIO_INPUT_STREAM_H_