Track UMA stats for when the renderer side audio device wasn't ready.

content/browser/renderer_host/media/audio_sync_reader.h

Index: content/browser/renderer_host/media/audio_sync_reader.h
diff --git a/content/browser/renderer_host/media/audio_sync_reader.h b/content/browser/renderer_host/media/audio_sync_reader.h
index b2c3b1ffcd5cbf97d030dcb6de30b29568ec73bb..d977c8bf411db10a77aab55b29a7bab7207d88b7 100644
--- a/content/browser/renderer_host/media/audio_sync_reader.h
+++ b/content/browser/renderer_host/media/audio_sync_reader.h
@@ -67,6 +67,10 @@ class AudioSyncReader : public media::AudioOutputController::SyncReader {
   // Maximum amount of audio data which can be transferred in one Read() call.
   int packet_size_;
 
+  // Track the number of times the renderer wasn't ready and report a UMA stat

[Chris Rogers, 2013/01/17 02:22:25]

nit: "wasn't ready" -> "missed its real-time deadline"

+  // during destruction if the count is too high.
+  size_t renderer_wasnt_ready_;

[Chris Rogers, 2013/01/17 02:22:25]

nit: not too crazy about the name.  How about missed_count_?

+
   DISALLOW_COPY_AND_ASSIGN(AudioSyncReader);
 };