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

media/base/audio_renderer_sink.h

Index: media/base/audio_renderer_sink.h
diff --git a/media/base/audio_renderer_sink.h b/media/base/audio_renderer_sink.h
index 30cbfef5ae3b82b27375346d90b47f5b5c4ef577..48f36331e3fc094fe2353d7bae7d9f299171c149 100644
--- a/media/base/audio_renderer_sink.h
+++ b/media/base/audio_renderer_sink.h
@@ -41,6 +41,10 @@ class AudioRendererSink
     // Signals an error has occurred.
     virtual void OnRenderError() = 0;
 
+    // Signals that the consumer has skipped frames in playout.

[DaleCurtis, 2015/12/01 18:12:46]

Why a new method instead of rolling this into the Render() call?

[Henrik Grunell, 2015/12/03 17:01:07]

I had some reason that I don't recall or can figure out now. Changed.

+    // TODO BEFORE COMMIT: Pure virtual.
+    virtual void OnFramesSkipped(uint32_t frames_skipped){};
+
    protected:
     virtual ~RenderCallback() {}
   };