Add test coverage for CrasAudioHandler.

chromeos/audio/mock_cras_audio_handler.cc

-// 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.
-
-#include "chromeos/audio/mock_cras_audio_handler.h"
-
-#include "chromeos/audio/audio_devices_pref_handler.h"
-
-namespace chromeos {
-
-void MockCrasAudioHandler::AddAudioObserver(AudioObserver* observer) {
-}
-
-void MockCrasAudioHandler::RemoveAudioObserver(AudioObserver* observer) {
-}
-
-bool MockCrasAudioHandler::IsOutputMuted() {
-  return false;
-}
-
-bool MockCrasAudioHandler::IsInputMuted() {
-  return false;
-}
-
-int MockCrasAudioHandler::GetOutputVolumePercent() {
-  return 0;
-}
-
-uint64 MockCrasAudioHandler::GetActiveOutputNode() const {
-  return 0;
-}
-
-uint64 MockCrasAudioHandler::GetActiveInputNode() const {
-  return 0;
-}
-
-void MockCrasAudioHandler::GetAudioDevices(AudioDeviceList* device_list) const {
-}
-
-bool MockCrasAudioHandler::GetActiveOutputDevice(AudioDevice* device) const {
-  return false;
-}
-
-bool MockCrasAudioHandler::has_alternative_input() const {
-  return false;
-}
-
-bool MockCrasAudioHandler::has_alternative_output() const {
-  return false;
-}
-
-void MockCrasAudioHandler::SetOutputVolumePercent(int volume_percent) {
-}
-
-void MockCrasAudioHandler::AdjustOutputVolumeByPercent(int adjust_by_percent) {
-}
-
-void MockCrasAudioHandler::SetOutputMute(bool mute_on) {
-}
-
-void MockCrasAudioHandler::SetInputMute(bool mute_on) {
-}
-
-void MockCrasAudioHandler::SwitchToDevice(const AudioDevice& device) {
-}
-
-MockCrasAudioHandler::MockCrasAudioHandler() : CrasAudioHandler(NULL) {
-}
-
-MockCrasAudioHandler::~MockCrasAudioHandler() {
-}
-
-}  // namespace chromeos