Standardize usage of virtual/override/final in media/

media/audio/sounds/audio_stream_handler.cc

 // Copyright 2013 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.
 
 #include "media/audio/sounds/audio_stream_handler.h"
 
 #include <string>
 
 #include "base/cancelable_callback.h"
 #include "base/logging.h"
@@ skipping 25 matching lines @@
 class AudioStreamHandler::AudioStreamContainer
     : public AudioOutputStream::AudioSourceCallback {
  public:
   AudioStreamContainer(const WavAudioHandler& wav_audio)
       : started_(false),
         stream_(NULL),
         cursor_(0),
         delayed_stop_posted_(false),
         wav_audio_(wav_audio) {}
 
-  virtual ~AudioStreamContainer() {
+  ~AudioStreamContainer() override {
     DCHECK(AudioManager::Get()->GetTaskRunner()->BelongsToCurrentThread());
   }
 
   void Play() {
     DCHECK(AudioManager::Get()->GetTaskRunner()->BelongsToCurrentThread());
 
     if (!stream_) {
       const AudioParameters& p = wav_audio_.params();
       const AudioParameters params(AudioParameters::AUDIO_PCM_LOW_LATENCY,
                                    p.channel_layout(),
@@ skipping 40 matching lines @@
     StopStream();
     if (stream_)
       stream_->Close();
     stream_ = NULL;
     stop_closure_.Cancel();
   }
 
  private:
   // AudioOutputStream::AudioSourceCallback overrides:
   // Following methods could be called from *ANY* thread.
-  virtual int OnMoreData(AudioBus* dest,
-                         uint32 /* total_bytes_delay */) override {
+  int OnMoreData(AudioBus* dest, uint32 /* total_bytes_delay */) override {
     base::AutoLock al(state_lock_);
     size_t bytes_written = 0;
 
     if (wav_audio_.AtEnd(cursor_) ||
         !wav_audio_.CopyTo(dest, cursor_, &bytes_written)) {
       if (delayed_stop_posted_)
         return 0;
       delayed_stop_posted_ = true;
       AudioManager::Get()->GetTaskRunner()->PostDelayedTask(
           FROM_HERE,
           stop_closure_.callback(),
           base::TimeDelta::FromMilliseconds(kKeepAliveMs));
       return 0;
     }
     cursor_ += bytes_written;
     return dest->frames();
   }
 
-  virtual void OnError(AudioOutputStream* /* stream */) override {
+  void OnError(AudioOutputStream* /* stream */) override {
     LOG(ERROR) << "Error during system sound reproduction.";
   }
 
   void StopStream() {
     DCHECK(AudioManager::Get()->GetTaskRunner()->BelongsToCurrentThread());
 
     if (stream_ && started_) {
       // Do not hold the |state_lock_| while stopping the output stream.
       stream_->Stop();
       if (g_observer_for_testing)
@@ skipping 72 matching lines @@
   g_observer_for_testing = observer;
 }
 
 // static
 void AudioStreamHandler::SetAudioSourceForTesting(
     AudioOutputStream::AudioSourceCallback* source) {
   g_audio_source_for_testing = source;
 }
 
 }  // namespace media