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

media/audio/audio_io.h

Index: media/audio/audio_io.h
diff --git a/media/audio/audio_io.h b/media/audio/audio_io.h
index 56392154e3229a062a77fd8b1d9ba12090558bca..45af3d29db960015e27dd8b5bf0598687077a47e 100644
--- a/media/audio/audio_io.h
+++ b/media/audio/audio_io.h
@@ -61,7 +61,10 @@ class MEDIA_EXPORT AudioOutputStream {
     // Provide more data by fully filling |dest|.  The source will return
     // the number of frames it filled.  |total_bytes_delay| contains current
     // number of bytes of delay buffered by the AudioOutputStream.
-    virtual int OnMoreData(AudioBus* dest, uint32 total_bytes_delay) = 0;
+    // |frames_skipped| contains the number of frames skipped by the consumer.
+    virtual int OnMoreData(AudioBus* dest,
+                           uint32_t total_bytes_delay,
+                           uint32_t frames_skipped) = 0;
 
     // There was an error while playing a buffer. Audio source cannot be
     // destroyed yet. No direct action needed by the AudioStream, but it is