Refactor AudioInputController and related interfaces.

media/audio/test_audio_input_controller_factory.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_TEST_AUDIO_INPUT_CONTROLLER_FACTORY_H_
 #define MEDIA_AUDIO_TEST_AUDIO_INPUT_CONTROLLER_FACTORY_H_
 
 #include "base/bind.h"
 #include "base/macros.h"
 #include "media/audio/audio_input_controller.h"
@@ skipping 47 matching lines @@
   TestAudioInputController(TestAudioInputControllerFactory* factory,
                            AudioManager* audio_manager,
                            const AudioParameters& audio_parameters,
                            EventHandler* event_handler,
                            SyncWriter* sync_writer,
                            UserInputMonitor* user_input_monitor);
 
   // Returns the event handler installed on the AudioInputController.
   EventHandler* event_handler() const { return event_handler_; }
 
+  // Returns a pointer to the audio callback for the AudioInputController.
+  SyncWriter* sync_writer() const { return sync_writer_; }
+
   // Notifies the TestAudioControllerOpened() event to the delegate (if any).
   void Record() override;
 
   // Ensure that the closure is run on the audio-manager thread.
   void Close(const base::Closure& closed_task) override;
 
   const AudioParameters& audio_parameters() const {
     return audio_parameters_;
   }
 
  protected:
   ~TestAudioInputController() override;
 
  private:
   AudioParameters audio_parameters_;
 
   // These are not owned by us and expected to be valid for this object's
   // lifetime.
   TestAudioInputControllerFactory* factory_;
-  EventHandler* event_handler_;
+  EventHandler* const event_handler_;
+  SyncWriter* const sync_writer_;
 
   DISALLOW_COPY_AND_ASSIGN(TestAudioInputController);
 };
 
 typedef TestAudioInputController::Delegate TestAudioInputControllerDelegate;
 
 // Simple AudioInputController::Factory method that creates
 // TestAudioInputControllers.
 class TestAudioInputControllerFactory : public AudioInputController::Factory {
  public:
@@ skipping 27 matching lines @@
 
   // The delegate for tests for receiving audio controller events.
   TestAudioInputControllerDelegate* delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(TestAudioInputControllerFactory);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_TEST_AUDIO_INPUT_CONTROLLER_FACTORY_H_