Switching AudioOutputAuthorizationHandler from using AudioManager interface to AudioSystem one.

media/audio/mock_audio_manager.h

Index: media/audio/mock_audio_manager.h
diff --git a/media/audio/mock_audio_manager.h b/media/audio/mock_audio_manager.h
index ae5bd50df95b0c4f06f516c423219ca0334dc706..619398d0b8635e4148f2cfcdc59eb3d811a814b5 100644
--- a/media/audio/mock_audio_manager.h
+++ b/media/audio/mock_audio_manager.h
@@ -72,16 +72,23 @@ class MockAudioManager : public AudioManager {
   const char* GetName() override;
 
   // Setters to emulate desired in-test behavior.
-  void SetInputStreamParameters(const AudioParameters& input_params);
+  void SetInputStreamParameters(const AudioParameters& params);
+  void SetOutputStreamParameters(const AudioParameters& params);
+  void SetDefaultOutputStreamParameters(const AudioParameters& params);
   void SetHasInputDevices(bool has_input_devices);
+  void SetHasOutputDevices(bool has_output_devices);
 
  protected:
   ~MockAudioManager() override;
 
  private:
   friend class base::DeleteHelper<MockAudioManager>;
+
   AudioParameters input_params_;
+  AudioParameters output_params_;
+  AudioParameters default_output_params_;
   bool has_input_devices_ = true;
+  bool has_output_devices_ = true;
 
   DISALLOW_COPY_AND_ASSIGN(MockAudioManager);
 };