Standardize usage of virtual/override/final in media/

media/base/audio_buffer_converter.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 MEDIA_BASE_AUDIO_BUFFER_CONVERTER
 #define MEDIA_BASE_AUDIO_BUFFER_CONVERTER
 
 #include <deque>
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
 #include "media/audio/audio_parameters.h"
 #include "media/base/audio_converter.h"
 #include "media/base/audio_timestamp_helper.h"
 #include "media/base/media_export.h"
 
 namespace media {
 
 class AudioBuffer;
 class AudioBus;
 
 // Takes AudioBuffers in any format and uses an AudioConverter to convert them
 // to a common format (usually the hardware output format).
 class MEDIA_EXPORT AudioBufferConverter : public AudioConverter::InputCallback {
  public:
   explicit AudioBufferConverter(const AudioParameters& output_params);
-  virtual ~AudioBufferConverter();
+  ~AudioBufferConverter() override;
 
   void AddInput(const scoped_refptr<AudioBuffer>& buffer);
 
   // Is an output buffer available via GetNextBuffer()?
   bool HasNextBuffer();
 
   // This should only be called this is HasNextBuffer() returns true.
   scoped_refptr<AudioBuffer> GetNextBuffer();
 
   // Reset internal state.
   void Reset();
 
   // Reset internal timestamp state. Upon the next AddInput() call, our base
   // timestamp will be set to match the input buffer.
   void ResetTimestampState();
 
   int input_buffer_size_for_testing() const {
     return input_params_.frames_per_buffer();
   }
   int input_frames_left_for_testing() const {
     return input_frames_;
   }
 
  private:
   // Callback to provide data to the AudioConverter
-  virtual double ProvideInput(AudioBus* audio_bus,
-                              base::TimeDelta buffer_delay) override;
+  double ProvideInput(AudioBus* audio_bus,
+                      base::TimeDelta buffer_delay) override;
 
   // Reset the converter in response to a configuration change.
   void ResetConverter(const scoped_refptr<AudioBuffer>& input_buffer);
 
   // Perform conversion if we have enough data.
   void ConvertIfPossible();
 
   // Flush remaining output
   void Flush();
 
@@ skipping 33 matching lines @@
   // full AudioBuses in ProvideInput()?
   bool is_flushing_;
 
   // The AudioConverter which does the real work here.
   scoped_ptr<AudioConverter> audio_converter_;
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_AUDIO_BUFFER_CONVERTER