Standardize usage of virtual/override/final in media/

media/audio/fake_audio_log_factory.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 MEDIA_AUDIO_FAKE_AUDIO_LOG_FACTORY_H_
 #define MEDIA_AUDIO_FAKE_AUDIO_LOG_FACTORY_H_
 
 #include "base/compiler_specific.h"
 #include "media/audio/audio_logging.h"
 #include "media/base/media_export.h"
 
 namespace media {
 
 // Creates stub AudioLog instances, for testing, which do nothing.
 class MEDIA_EXPORT FakeAudioLogFactory
     : NON_EXPORTED_BASE(public AudioLogFactory) {
  public:
   FakeAudioLogFactory();
-  virtual ~FakeAudioLogFactory();
-  virtual scoped_ptr<AudioLog> CreateAudioLog(
-      AudioComponent component) override;
+  ~FakeAudioLogFactory() override;
+  scoped_ptr<AudioLog> CreateAudioLog(AudioComponent component) override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(FakeAudioLogFactory);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_FAKE_AUDIO_LOG_FACTORY_H_