Standardize usage of virtual/override/final in media/

media/audio/audio_output_controller.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_AUDIO_OUTPUT_CONTROLLER_H_
 #define MEDIA_AUDIO_AUDIO_OUTPUT_CONTROLLER_H_
 
 #include "base/atomic_ref_count.h"
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
@@ skipping 136 matching lines @@
   //
   // Changing the output device causes the controller to go through
   // the same state transition back to the current state as a call to
   // OnDeviceChange (unless it is currently diverting, see
   // Start/StopDiverting below, in which case the state transition
   // will happen when StopDiverting is called).
   void SwitchOutputDevice(const std::string& output_device_id,
                           const base::Closure& callback);
 
   // AudioSourceCallback implementation.
-  virtual int OnMoreData(AudioBus* dest,
-                         uint32 total_bytes_delay) override;
-  virtual void OnError(AudioOutputStream* stream) override;
+  int OnMoreData(AudioBus* dest, uint32 total_bytes_delay) override;
+  void OnError(AudioOutputStream* stream) override;
 
   // AudioDeviceListener implementation.  When called AudioOutputController will
   // shutdown the existing |stream_|, transition to the kRecreating state,
   // create a new stream, and then transition back to an equivalent state prior
   // to being called.
-  virtual void OnDeviceChange() override;
+  void OnDeviceChange() override;
 
   // AudioSourceDiverter implementation.
-  virtual const AudioParameters& GetAudioParameters() override;
-  virtual void StartDiverting(AudioOutputStream* to_stream) override;
-  virtual void StopDiverting() override;
+  const AudioParameters& GetAudioParameters() override;
+  void StartDiverting(AudioOutputStream* to_stream) override;
+  void StopDiverting() override;
 
   // Accessor for AudioPowerMonitor::ReadCurrentPowerAndClip().  See comments in
   // audio_power_monitor.h for usage.  This may be called on any thread.
   std::pair<float, bool> ReadCurrentPowerAndClip();
 
  protected:
   // Internal state of the source.
   enum State {
     kEmpty,
     kCreated,
     kPlaying,
     kPaused,
     kClosed,
     kError,
   };
 
   // Time constant for AudioPowerMonitor.  See AudioPowerMonitor ctor comments
   // for semantics.  This value was arbitrarily chosen, but seems to work well.
   enum { kPowerMeasurementTimeConstantMillis = 10 };
 
   friend class base::RefCountedThreadSafe<AudioOutputController>;
-  virtual ~AudioOutputController();
+  ~AudioOutputController() override;
 
  private:
   AudioOutputController(AudioManager* audio_manager, EventHandler* handler,
                         const AudioParameters& params,
                         const std::string& output_device_id,
                         SyncReader* sync_reader);
 
   // The following methods are executed on the audio manager thread.
   void DoCreate(bool is_for_device_change);
   void DoPlay();
@@ skipping 48 matching lines @@
   // Flags when we've asked for a stream to start but it never did.
   base::AtomicRefCount on_more_io_data_called_;
   scoped_ptr<base::OneShotTimer<AudioOutputController> > wedge_timer_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioOutputController);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_AUDIO_OUTPUT_CONTROLLER_H_