Standardize usage of virtual/override/final specifiers.

components/copresence/mediums/audio/audio_player_impl.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 COMPONENTS_COPRESENCE_MEDIUMS_AUDIO_AUDIO_PLAYER_IMPL_H_
 #define COMPONENTS_COPRESENCE_MEDIUMS_AUDIO_AUDIO_PLAYER_IMPL_H_
 
 #include <vector>
 
 #include "base/gtest_prod_util.h"
@@ skipping 28 matching lines @@
   void set_output_stream_for_testing(
       media::AudioOutputStream* output_stream_for_testing) {
     output_stream_for_testing_.reset(output_stream_for_testing);
   }
 
  private:
   friend class AudioPlayerTest;
   FRIEND_TEST_ALL_PREFIXES(AudioPlayerTest, BasicPlayAndStop);
   FRIEND_TEST_ALL_PREFIXES(AudioPlayerTest, OutOfOrderPlayAndStopMultiple);
 
-  virtual ~AudioPlayerImpl();
+  ~AudioPlayerImpl() override;
 
   // Methods to do our various operations; all of these need to be run on the
   // audio thread.
   void InitializeOnAudioThread();
   void PlayOnAudioThread(
       const scoped_refptr<media::AudioBusRefCounted>& samples);
   void StopOnAudioThread();
   void StopAndCloseOnAudioThread();
   void FinalizeOnAudioThread();
 
@@ skipping 20 matching lines @@
 
   // Index to the frame in the samples that we need to play next.
   int frame_index_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioPlayerImpl);
 };
 
 }  // namespace copresence
 
 #endif  // COMPONENTS_COPRESENCE_MEDIUMS_AUDIO_AUDIO_PLAYER_IMPL_H_