Standardize usage of virtual/override/final in media/

media/audio/fake_audio_input_stream.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.
 //
 // A fake implementation of AudioInputStream, useful for testing purpose.
 
 #ifndef MEDIA_AUDIO_FAKE_AUDIO_INPUT_STREAM_H_
 #define MEDIA_AUDIO_FAKE_AUDIO_INPUT_STREAM_H_
 
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/synchronization/lock.h"
 #include "base/threading/thread.h"
 #include "base/time/time.h"
 #include "media/audio/audio_io.h"
 #include "media/audio/audio_parameters.h"
 
 namespace media {
 
 class AudioBus;
 class AudioManagerBase;
 
 class MEDIA_EXPORT FakeAudioInputStream
     : public AudioInputStream {
  public:
   static AudioInputStream* MakeFakeStream(AudioManagerBase* manager,
                                           const AudioParameters& params);
 
-  virtual bool Open() override;
-  virtual void Start(AudioInputCallback* callback) override;
-  virtual void Stop() override;
-  virtual void Close() override;
-  virtual double GetMaxVolume() override;
-  virtual void SetVolume(double volume) override;
-  virtual double GetVolume() override;
-  virtual bool IsMuted() override;
-  virtual void SetAutomaticGainControl(bool enabled) override;
-  virtual bool GetAutomaticGainControl() override;
+  bool Open() override;
+  void Start(AudioInputCallback* callback) override;
+  void Stop() override;
+  void Close() override;
+  double GetMaxVolume() override;
+  void SetVolume(double volume) override;
+  double GetVolume() override;
+  bool IsMuted() override;
+  void SetAutomaticGainControl(bool enabled) override;
+  bool GetAutomaticGainControl() override;
 
   // Generate one beep sound. This method is called by
   // FakeVideoCaptureDevice to test audio/video synchronization.
   // This is a static method because FakeVideoCaptureDevice is
   // disconnected from an audio device. This means only one instance of
   // this class gets to respond, which is okay because we assume there's
   // only one stream for this testing purpose.
   // TODO(hclam): Make this non-static. To do this we'll need to fix
   // crbug.com/159053 such that video capture device is aware of audio
   // input stream.
   static void BeepOnce();
 
  private:
   FakeAudioInputStream(AudioManagerBase* manager,
                        const AudioParameters& params);
 
-  virtual ~FakeAudioInputStream();
+  ~FakeAudioInputStream() override;
 
   void DoCallback();
 
   AudioManagerBase* audio_manager_;
   AudioInputCallback* callback_;
   scoped_ptr<uint8[]> buffer_;
   int buffer_size_;
   AudioParameters params_;
   const scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
   base::TimeTicks last_callback_time_;
   base::TimeDelta callback_interval_;
   base::TimeDelta interval_from_last_beep_;
   int beep_duration_in_buffers_;
   int beep_generated_in_buffers_;
   int beep_period_in_frames_;
   int frames_elapsed_;
   scoped_ptr<media::AudioBus> audio_bus_;
 
   // Allows us to run tasks on the FakeAudioInputStream instance which are
   // bound by its lifetime.
   base::WeakPtrFactory<FakeAudioInputStream> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeAudioInputStream);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_FAKE_AUDIO_INPUT_STREAM_H_