replace OVERRIDE and FINAL with override and final in ash/

ash/system/chromeos/audio/tray_audio_delegate_chromeos.h

 // Copyright 2014 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 ASH_SYSTEM_AUDIO_TRAY_AUDIO_DELEGATE_CHROMEOS_H_
 #define ASH_SYSTEM_AUDIO_TRAY_AUDIO_DELEGATE_CHROMEOS_H_
 
 #include "ash/ash_export.h"
 #include "ash/system/audio/tray_audio_delegate.h"
 #include "base/compiler_specific.h"
 
 namespace ash {
 namespace system {
 
 class ASH_EXPORT TrayAudioDelegateChromeOs : public TrayAudioDelegate {
  public:
   virtual ~TrayAudioDelegateChromeOs() {}
 
   // Overridden from TrayAudioDelegate.
-  virtual void AdjustOutputVolumeToAudibleLevel() OVERRIDE;
-  virtual int GetOutputDefaultVolumeMuteLevel() OVERRIDE;
-  virtual int GetOutputVolumeLevel() OVERRIDE;
-  virtual int GetActiveOutputDeviceIconId() OVERRIDE;
-  virtual bool HasAlternativeSources() OVERRIDE;
-  virtual bool IsOutputAudioMuted() OVERRIDE;
-  virtual void SetOutputAudioIsMuted(bool is_muted) OVERRIDE;
-  virtual void SetOutputVolumeLevel(int level) OVERRIDE;
-  virtual void SetInternalSpeakerChannelMode(AudioChannelMode mode) OVERRIDE;
+  virtual void AdjustOutputVolumeToAudibleLevel() override;
+  virtual int GetOutputDefaultVolumeMuteLevel() override;
+  virtual int GetOutputVolumeLevel() override;
+  virtual int GetActiveOutputDeviceIconId() override;
+  virtual bool HasAlternativeSources() override;
+  virtual bool IsOutputAudioMuted() override;
+  virtual void SetOutputAudioIsMuted(bool is_muted) override;
+  virtual void SetOutputVolumeLevel(int level) override;
+  virtual void SetInternalSpeakerChannelMode(AudioChannelMode mode) override;
 };
 
 }  // namespace system
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_AUDIO_TRAY_AUDIO_DELEGATE_CHROMEOS_H_