Add test coverage for CrasAudioHandler.

chromeos/audio/mock_cras_audio_handler.h

-// Copyright 2013 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 CHROMEOS_AUDIO_MOCK_CRAS_AUDIO_HANDLER_H_
-#define CHROMEOS_AUDIO_MOCK_CRAS_AUDIO_HANDLER_H_
-
-#include "chromeos/audio/cras_audio_handler.h"
-
-namespace chromeos {
-
-// Mock class for CrasAudioHandler.
-class CHROMEOS_EXPORT MockCrasAudioHandler : public CrasAudioHandler {
- public:
-  MockCrasAudioHandler();
-  virtual ~MockCrasAudioHandler();
-
-  virtual void AddAudioObserver(AudioObserver* observer) OVERRIDE;
-  virtual void RemoveAudioObserver(AudioObserver* observer) OVERRIDE;
-  virtual bool IsOutputMuted() OVERRIDE;
-  virtual bool IsInputMuted() OVERRIDE;
-  virtual int GetOutputVolumePercent() OVERRIDE;
-  virtual uint64 GetActiveOutputNode() const OVERRIDE;
-  virtual uint64 GetActiveInputNode() const OVERRIDE;
-  virtual void GetAudioDevices(AudioDeviceList* device_list) const OVERRIDE;
-  virtual bool GetActiveOutputDevice(AudioDevice* device) const OVERRIDE;
-  virtual bool has_alternative_input() const OVERRIDE;
-  virtual bool has_alternative_output() const OVERRIDE;
-  virtual void SetOutputVolumePercent(int volume_percent) OVERRIDE;
-  virtual void AdjustOutputVolumeByPercent(int adjust_by_percent) OVERRIDE;
-  virtual void SetOutputMute(bool mute_on) OVERRIDE;
-  virtual void SetInputMute(bool mute_on) OVERRIDE;
-  virtual void SwitchToDevice(const AudioDevice& device) OVERRIDE;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(MockCrasAudioHandler);
-};
-
-}  // namespace chromeos
-
-#endif  // CHROMEOS_AUDIO_MOCK_CRAS_AUDIO_HANDLER_H_