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

media/base/fake_audio_renderer_sink.h

 // Copyright 2013 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_FAKE_AUDIO_RENDERER_SINK_H_
 #define MEDIA_BASE_FAKE_AUDIO_RENDERER_SINK_H_
 
 #include <string>
 
 #include "media/audio/audio_parameters.h"
@@ skipping 25 matching lines @@
   bool SetVolume(double volume) override;
   OutputDevice* GetOutputDevice() override;
 
   // Attempts to call Render() on the callback provided to
   // Initialize() with |dest| and |audio_delay_milliseconds|.
   // Returns true and sets |frames_written| to the return value of the
   // Render() call.
   // Returns false if this object is in a state where calling Render()
   // should not occur. (i.e., in the kPaused or kStopped state.) The
   // value of |frames_written| is undefined if false is returned.
-  bool Render(AudioBus* dest, int audio_delay_milliseconds,
+  bool Render(AudioBus* dest,
+              uint32_t audio_delay_milliseconds,
               int* frames_written);
   void OnRenderError();
 
   State state() const { return state_; }
 
  protected:
   ~FakeAudioRendererSink() override;
 
  private:
   void ChangeState(State new_state);
 
   State state_;
   RenderCallback* callback_;
   scoped_ptr<FakeOutputDevice> output_device_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeAudioRendererSink);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_FAKE_AUDIO_RENDERER_SINK_H_