There is a racing between SyncSocket::Receive in audio_thread_ and SyncSocket::Close in renderer ...

content/renderer/media/audio_device.h

Index: content/renderer/media/audio_device.h
===================================================================
--- content/renderer/media/audio_device.h	(revision 111890)
+++ content/renderer/media/audio_device.h	(working copy)
@@ -165,6 +165,9 @@
   // Our stream ID on the message filter. Only accessed on the IO thread.
   int32 stream_id_;
 
+  // WaitableEvent for signaling the audio thread that it should stop.
+  base::WaitableEvent audio_event_;

[enal1, 2011/11/29 16:14:48]

Maybe include "stop" in the name? Something like "audio_thread_should_stop"?

[tommi (sloooow) - chröme, 2011/11/29 16:41:53]

audio_event_ -> stop_event_
or stop_audio_event_

+
   // Data transfer between browser and render process uses a combination
   // of sync sockets and shared memory to provide lowest possible latency.
   scoped_ptr<base::SharedMemory> shared_memory_;