Forward the number of skipped frames by the OS in audio playout.

media/base/audio_renderer_mixer.h

 // Copyright (c) 2012 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_BASE_AUDIO_RENDERER_MIXER_H_
 #define MEDIA_BASE_AUDIO_RENDERER_MIXER_H_
 
 #include <map>
 #include <string>
 
@@ skipping 30 matching lines @@
   }
 
   // TODO(guidou): remove this method. The output device of a mixer should
   // never be switched, as it may result in a discrepancy between the output
   // parameters of the new device and the output parameters with which the
   // mixer was initialized. See crbug.com/506507
   OutputDevice* GetOutputDevice();
 
  private:
   // AudioRendererSink::RenderCallback implementation.
-  int Render(AudioBus* audio_bus, int audio_delay_milliseconds) override;
+  int Render(AudioBus* audio_bus,
+             int audio_delay_milliseconds,
+             uint32_t frames_skipped) override;
   void OnRenderError() override;
 
   // Output sink for this mixer.
   scoped_refptr<AudioRendererSink> audio_sink_;
 
   // ---------------[ All variables below protected by |lock_| ]---------------
   base::Lock lock_;
 
   // List of error callbacks used by this mixer.
   typedef std::list<base::Closure> ErrorCallbackList;
   ErrorCallbackList error_callbacks_;
 
   // Handles mixing and resampling between input and output parameters.
   AudioConverter audio_converter_;
 
   // Handles physical stream pause when no inputs are playing.  For latency
   // reasons we don't want to immediately pause the physical stream.
   base::TimeDelta pause_delay_;
   base::TimeTicks last_play_time_;
   bool playing_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioRendererMixer);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_AUDIO_RENDERER_MIXER_H_