Add OVERRIDE to media/.

media/filters/audio_renderer_base.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.
 
 // AudioRendererBase takes care of the tricky queuing work and provides simple
 // methods for subclasses to peek and poke at audio data.  In addition to
 // AudioRenderer interface methods this classes doesn't implement, subclasses
 // must also implement the following methods:
 //   OnInitialized
 //   OnStop
@@ skipping 70 matching lines @@
   // This is an indication that all the data written to the device has been
   // played.
   //
   // Safe to call on any thread.
   uint32 FillBuffer(uint8* dest,
                     uint32 len,
                     const base::TimeDelta& playback_delay,
                     bool buffers_empty);
 
   // Get/Set the playback rate of |algorithm_|.
-  virtual void SetPlaybackRate(float playback_rate);
+  virtual void SetPlaybackRate(float playback_rate) OVERRIDE;
   virtual float GetPlaybackRate();
 
  private:
   // Helper method that schedules an asynchronous read from the decoder and
   // increments |pending_reads_|.
   //
   // Safe to call from any thread.
   void ScheduleRead_Locked();
 
   // Audio decoder.
@@ skipping 39 matching lines @@
   base::Closure underflow_callback_;
 
   base::TimeDelta seek_timestamp_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioRendererBase);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_AUDIO_RENDERER_BASE_H_