Add OVERRIDE to media/.

media/audio/simple_sources.h

 // Copyright (c) 2011 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_SIMPLE_SOURCES_H_
 #define MEDIA_AUDIO_SIMPLE_SOURCES_H_
 
 #include <list>
 
 #include "media/audio/audio_io.h"
@@ skipping 10 matching lines @@
   // |channels| is the number of audio channels, |freq| is the frequency in
   // hertz and it has to be less than half of the sampling frequency
   // |sample_freq| or else you will get aliasing.
   SineWaveAudioSource(Format format, int channels,
                       double freq, double sample_freq);
   virtual ~SineWaveAudioSource() {}
 
   // Implementation of AudioSourceCallback.
   virtual uint32 OnMoreData(
       AudioOutputStream* stream, uint8* dest, uint32 max_size,
-      AudioBuffersState audio_buffers);
-  virtual void OnError(AudioOutputStream* stream, int code);
+      AudioBuffersState audio_buffers) OVERRIDE;
+  virtual void OnError(AudioOutputStream* stream, int code) OVERRIDE;
 
  protected:
   Format format_;
   int channels_;
   double freq_;
   double sample_freq_;
 };
 
 // Defines an interface for pushing audio output. In contrast, the interfaces
 // defined by AudioSourceCallback are pull model only.
@@ skipping 15 matching lines @@
 // of audio buffers and is unaware of the actual audio format.
 // Note that the PushSource is not thread safe and user need to provide locking.
 class MEDIA_EXPORT PushSource
     : public AudioOutputStream::AudioSourceCallback,
       public PushAudioOutput {
  public:
   PushSource();
   virtual ~PushSource();
 
   // Write one buffer.
-  virtual bool Write(const void* data, uint32 len);
+  virtual bool Write(const void* data, uint32 len) OVERRIDE;
 
   // Return the total number of bytes not given to the audio device yet.
-  virtual uint32 UnProcessedBytes();
+  virtual uint32 UnProcessedBytes() OVERRIDE;
 
   // Implementation of AudioSourceCallback.
-  virtual uint32 OnMoreData(AudioOutputStream* stream, uint8* dest,
-                            uint32 max_size, AudioBuffersState buffers_state);
-  virtual void OnError(AudioOutputStream* stream, int code);
+  virtual uint32 OnMoreData(AudioOutputStream* stream,
+                            uint8* dest,
+                            uint32 max_size,
+                            AudioBuffersState buffers_state) OVERRIDE;
+  virtual void OnError(AudioOutputStream* stream, int code) OVERRIDE;
 
   // Discard all buffered data and reset to initial state.
   void ClearAll();
 
  private:
   // Free acquired resources.
   void CleanUp();
 
   media::SeekableBuffer buffer_;
 };
 
 #endif  // MEDIA_AUDIO_SIMPLE_SOURCES_H_