Replace the guts of AudioRendererBase with calls to scaling algorithm.

media/filters/audio_renderer_impl.h

 // Copyright (c) 2009 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_FILTERS_AUDIO_RENDERER_IMPL_H_
 #define MEDIA_FILTERS_AUDIO_RENDERER_IMPL_H_
 
 // This is the default implementation of AudioRenderer, which uses the audio
 // interfaces to open an audio device.  Although it cannot be used in the
 // sandbox, it serves as a reference implementation and can be used in other
@@ skipping 40 matching lines @@
   // Only allow a factory to create this class.
   friend class FilterFactoryImpl0<AudioRendererImpl>;
   AudioRendererImpl();
   virtual ~AudioRendererImpl();
 
   // AudioRendererBase implementation.
   virtual bool OnInitialize(const MediaFormat& media_format);
   virtual void OnStop();
 
  private:
-  // Playback rate
-  // 0.0f is paused, 0.5f is half speed, 1.0f is normal, 2.0f is double speed.
-  // Rate should normally be any value between 0.5 and 3.0.
-  float playback_rate_;
-
   // Audio output stream device.
   AudioOutputStream* stream_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioRendererImpl);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_AUDIO_RENDERER_IMPL_H_