Add OVERRIDE to media/.

media/audio/fake_audio_output_stream.h

Index: media/audio/fake_audio_output_stream.h
diff --git a/media/audio/fake_audio_output_stream.h b/media/audio/fake_audio_output_stream.h
index ac53db5de1c9edc8bdd5e560bfab5825df3f9c6d..3ea0f8bf47f98d7f570d534fdb3f76b28cbd42aa 100644
--- a/media/audio/fake_audio_output_stream.h
+++ b/media/audio/fake_audio_output_stream.h
@@ -20,12 +20,12 @@ class MEDIA_EXPORT FakeAudioOutputStream : public AudioOutputStream {
   static AudioOutputStream* MakeFakeStream(const AudioParameters& params);
   static FakeAudioOutputStream* GetLastFakeStream();
 
-  virtual bool Open();
-  virtual void Start(AudioSourceCallback* callback);
-  virtual void Stop();
-  virtual void SetVolume(double volume);
-  virtual void GetVolume(double* volume);
-  virtual void Close();
+  virtual bool Open() OVERRIDE;
+  virtual void Start(AudioSourceCallback* callback) OVERRIDE;
+  virtual void Stop() OVERRIDE;
+  virtual void SetVolume(double volume) OVERRIDE;
+  virtual void GetVolume(double* volume) OVERRIDE;
+  virtual void Close() OVERRIDE;
 
   uint8* buffer() { return buffer_.get(); }
   double volume() { return volume_; }