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

media/base/fake_audio_renderer_sink.h

Index: media/base/fake_audio_renderer_sink.h
diff --git a/media/base/fake_audio_renderer_sink.h b/media/base/fake_audio_renderer_sink.h
index 0a9bd93234ab4d4b1c88ad91069c694b6bb9e917..765257dce5a1b244598cab70805f6bb26709ab7d 100644
--- a/media/base/fake_audio_renderer_sink.h
+++ b/media/base/fake_audio_renderer_sink.h
@@ -43,7 +43,8 @@ class FakeAudioRendererSink : public AudioRendererSink {
   // 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();