Update {virtual,override,final} to follow C++11 style.

media/audio/android/opensles_output.h

 // Copyright (c) 2012 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_ANDROID_OPENSLES_OUTPUT_H_
 #define MEDIA_AUDIO_ANDROID_OPENSLES_OUTPUT_H_
 
 #include <SLES/OpenSLES.h>
 #include <SLES/OpenSLES_Android.h>
 
@@ skipping 13 matching lines @@
 // audio buffers are given to us from an internal OpenSLES audio thread.
 // All public methods should be called on the Audio Manager thread.
 class OpenSLESOutputStream : public AudioOutputStream {
  public:
   static const int kMaxNumOfBuffersInQueue = 2;
 
   OpenSLESOutputStream(AudioManagerAndroid* manager,
                        const AudioParameters& params,
                        SLint32 stream_type);
 
-  virtual ~OpenSLESOutputStream();
+  ~OpenSLESOutputStream() override;
 
   // Implementation of AudioOutputStream.
-  virtual bool Open() override;
-  virtual void Close() override;
-  virtual void Start(AudioSourceCallback* callback) override;
-  virtual void Stop() override;
-  virtual void SetVolume(double volume) override;
-  virtual void GetVolume(double* volume) override;
+  bool Open() override;
+  void Close() override;
+  void Start(AudioSourceCallback* callback) override;
+  void Stop() override;
+  void SetVolume(double volume) override;
+  void GetVolume(double* volume) override;
 
   // Set the value of |muted_|. It does not affect |volume_| which can be
   // got by calling GetVolume(). See comments for |muted_| below.
   void SetMute(bool muted);
 
  private:
   bool CreatePlayer();
 
   // Called from OpenSLES specific audio worker thread.
   static void SimpleBufferQueueCallback(
@@ skipping 63 matching lines @@
 
   // Container for retrieving data from AudioSourceCallback::OnMoreData().
   scoped_ptr<AudioBus> audio_bus_;
 
   DISALLOW_COPY_AND_ASSIGN(OpenSLESOutputStream);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_ANDROID_OPENSLES_OUTPUT_H_