Standardize usage of virtual/override/final specifiers.

components/copresence/mediums/audio/audio_manager_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_MANAGER_IMPL_H_
 #define COMPONENTS_COPRESENCE_MEDIUMS_AUDIO_AUDIO_MANAGER_IMPL_H_
 
 #include <string>
 
 #include "base/callback.h"
@@ skipping 10 matching lines @@
 class AudioPlayer;
 class AudioRecorder;
 
 // The AudioManagerImpl class manages the playback and recording of tokens. Once
 // playback or recording is started, it is up to the audio manager to handle
 // the specifics of how this is done. In the future, for example, this class
 // may pause recording and playback to implement carrier sense.
 class AudioManagerImpl final : public AudioManager {
  public:
   AudioManagerImpl();
-  ~AudioManagerImpl();
+  ~AudioManagerImpl() override;
 
   // AudioManager overrides:
   void Initialize(const DecodeSamplesCallback& decode_cb,
                   const EncodeTokenCallback& encode_cb) override;
   void StartPlaying(AudioType type) override;
   void StopPlaying(AudioType type) override;
   void StartRecording(AudioType type) override;
   void StopRecording(AudioType type) override;
   void SetToken(AudioType type, const std::string& url_unsafe_token) override;
   const std::string GetToken(AudioType type) override;
@@ skipping 56 matching lines @@
   // expires the oldest samples first.
   // Indexed using enum AudioType.
   ScopedVector<SamplesMap> samples_cache_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioManagerImpl);
 };
 
 }  // namespace copresence
 
 #endif  // COMPONENTS_COPRESENCE_MEDIUMS_AUDIO_AUDIO_MANAGER_IMPL_H_