Merge 238501 "Attempt to fix audio wedges by restarting all stre..."

media/audio/audio_output_dispatcher.h

Index: media/audio/audio_output_dispatcher.h
===================================================================
--- media/audio/audio_output_dispatcher.h	(revision 240452)
+++ media/audio/audio_output_dispatcher.h	(working copy)
@@ -66,6 +66,13 @@
   // Called on the audio thread when the AudioManager is shutting down.
   virtual void Shutdown() = 0;
 
+  // Called by the AudioManager to restart streams when a wedge is detected.  A
+  // wedge means the OS failed to request any audio after StartStream().  When a
+  // wedge is detected all streams across all dispatchers must be closed.  After
+  // all streams are closed, streams are restarted.  See http://crbug.com/160920
+  virtual void CloseStreamsForWedgeFix() = 0;
+  virtual void RestartStreamsForWedgeFix() = 0;
+
   // Accessor to the input device id used by unified IO.
   const std::string& input_device_id() const { return input_device_id_; }