Have WebMediaPlayerImpl maintain a reference to AudioRendererSink.

webkit/media/webmediaplayer_impl.h

Index: webkit/media/webmediaplayer_impl.h
diff --git a/webkit/media/webmediaplayer_impl.h b/webkit/media/webmediaplayer_impl.h
index 16fba65035d34efe61f637c45ef7d15387c15cd4..e9f8cd57c35fc1a303179c646f35f4f59f21e0bc 100644
--- a/webkit/media/webmediaplayer_impl.h
+++ b/webkit/media/webmediaplayer_impl.h
@@ -325,7 +325,13 @@ class WebMediaPlayerImpl
 
   bool incremented_externally_allocated_memory_;
 
+  // TODO(scherkus): Sadly these two objects are the same and we're also forced
+  // to maintain an additional reference to |audio_renderer_sink_| otherwise
+  // |audio_source_provider_| will go bad after |pipeline_| shuts down.
+  //
+  // See http://crbug.com/136442 for details.
   WebKit::WebAudioSourceProvider* audio_source_provider_;
+  scoped_refptr<media::AudioRendererSink> audio_renderer_sink_;
 
   bool is_local_source_;
   bool supports_save_;