dbus: Remove unused MockCrasAudioClient.

chromeos/dbus/mock_cras_audio_client.h

-// Copyright (c) 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_DBUS_MOCK_CRAS_AUDIO_CLIENT_H_
-#define CHROMEOS_DBUS_MOCK_CRAS_AUDIO_CLIENT_H_
-
-#include "chromeos/dbus/cras_audio_client.h"
-#include "testing/gmock/include/gmock/gmock.h"
-
-namespace chromeos {
-
-class MockCrasAudioClient : public CrasAudioClient {
- public:
-  MockCrasAudioClient();
-  virtual ~MockCrasAudioClient();
-
-  MOCK_METHOD1(AddObserver, void(Observer*));
-  MOCK_METHOD1(RemoveObserver, void(Observer*));
-  MOCK_METHOD1(HasObserver, bool(Observer*));
-  MOCK_METHOD1(GetVolumeState, void(const GetVolumeStateCallback&));
-  MOCK_METHOD1(GetNodes, void(const GetNodesCallback&));
-  MOCK_METHOD1(SetOutputVolume, void(int32));
-  MOCK_METHOD1(SetOutputMute, void(bool));
-  MOCK_METHOD1(SetInputGain, void(int32));
-  MOCK_METHOD1(SetInputMute, void(bool));
-  MOCK_METHOD1(SetActiveOutputNode, void(uint64));
-  MOCK_METHOD1(SetActiveInputNode, void(uint64));
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(MockCrasAudioClient);
-};
-
-}  // namespace chromeos
-
-#endif  // CHROMEOS_DBUS_MOCK_CRAS_AUDIO_CLIENT_H_