Update {virtual,override,final} to follow C++11 style in extensions, round 2.

extensions/browser/api/audio/audio_service_chromeos.cc

 // 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.
 
 #include "extensions/browser/api/audio/audio_service.h"
 
 #include "base/callback.h"
 #include "base/memory/weak_ptr.h"
 #include "base/strings/string_number_conversions.h"
 #include "chromeos/audio/audio_device.h"
 #include "chromeos/audio/cras_audio_handler.h"
 #include "content/public/browser/browser_thread.h"
 
 using content::BrowserThread;
 
 namespace extensions {
 
 using core_api::audio::OutputDeviceInfo;
 using core_api::audio::InputDeviceInfo;
 
 class AudioServiceImpl : public AudioService,
                          public chromeos::CrasAudioHandler::AudioObserver {
  public:
   AudioServiceImpl();
-  virtual ~AudioServiceImpl();
+  ~AudioServiceImpl() override;
 
   // Called by listeners to this service to add/remove themselves as observers.
-  virtual void AddObserver(AudioService::Observer* observer) override;
-  virtual void RemoveObserver(AudioService::Observer* observer) override;
+  void AddObserver(AudioService::Observer* observer) override;
+  void RemoveObserver(AudioService::Observer* observer) override;
 
   // Start to query audio device information.
-  virtual void StartGetInfo(const GetInfoCallback& callback) override;
-  virtual void SetActiveDevices(const DeviceIdList& device_list) override;
-  virtual bool SetDeviceProperties(const std::string& device_id,
-                                   bool muted,
-                                   int volume,
-                                   int gain) override;
+  void StartGetInfo(const GetInfoCallback& callback) override;
+  void SetActiveDevices(const DeviceIdList& device_list) override;
+  bool SetDeviceProperties(const std::string& device_id,
+                           bool muted,
+                           int volume,
+                           int gain) override;
 
  protected:
   // chromeos::CrasAudioHandler::AudioObserver overrides.
-  virtual void OnOutputVolumeChanged() override;
-  virtual void OnInputGainChanged() override;
-  virtual void OnOutputMuteChanged() override;
-  virtual void OnInputMuteChanged() override;
-  virtual void OnAudioNodesChanged() override;
-  virtual void OnActiveOutputNodeChanged() override;
-  virtual void OnActiveInputNodeChanged() override;
+  void OnOutputVolumeChanged() override;
+  void OnInputGainChanged() override;
+  void OnOutputMuteChanged() override;
+  void OnInputMuteChanged() override;
+  void OnAudioNodesChanged() override;
+  void OnActiveOutputNodeChanged() override;
+  void OnActiveInputNodeChanged() override;
 
  private:
   void NotifyDeviceChanged();
 
   bool FindDevice(uint64 id, chromeos::AudioDevice* device);
   uint64 GetIdFromStr(const std::string& id_str);
 
   // List of observers.
   ObserverList<AudioService::Observer> observer_list_;
 
@@ skipping 163 matching lines @@
 
 void AudioServiceImpl::NotifyDeviceChanged() {
   FOR_EACH_OBSERVER(AudioService::Observer, observer_list_, OnDeviceChanged());
 }
 
 AudioService* AudioService::CreateInstance() {
   return new AudioServiceImpl;
 }
 
 }  // namespace extensions