Prevent AudioDeviceThread from starting if clients have called Stop() (round 2).

media/audio/audio_output_device.h

Index: media/audio/audio_output_device.h
diff --git a/media/audio/audio_output_device.h b/media/audio/audio_output_device.h
index ed270abee62f30f695a313903430b6ee32db0302..fe4459cc5018d411041b39c49a3e4f35a90187e6 100644
--- a/media/audio/audio_output_device.h
+++ b/media/audio/audio_output_device.h
@@ -160,6 +160,14 @@ class MEDIA_EXPORT AudioOutputDevice
   AudioDeviceThread audio_thread_;
   scoped_ptr<AudioOutputDevice::AudioThreadCallback> audio_callback_;
 
+  // Temporary hack to ignore OnStreamCreated() due to the user calling Stop()
+  // so we don't start the audio thread pointing to a potentially freed
+  // |callback_|.
+  //
+  // TODO(scherkus): Replace this by changing AudioRendererSink to either accept
+  // the callback via Start(). See http://crbug.com/151051 for details.
+  bool stopping_hack_;
+
   DISALLOW_COPY_AND_ASSIGN(AudioOutputDevice);
 };