Make AudioOutputDevice restartable and reinitializable

media/audio/audio_device_thread.h

Index: media/audio/audio_device_thread.h
diff --git a/media/audio/audio_device_thread.h b/media/audio/audio_device_thread.h
index 7ec9d6ea751da51a5919741d71bae378a272f65c..dd7d1cac925d476ba2c5401b38512e66f8dfe100 100644
--- a/media/audio/audio_device_thread.h
+++ b/media/audio/audio_device_thread.h
@@ -75,12 +75,12 @@ class MEDIA_EXPORT AudioDeviceThread {
   AudioDeviceThread();
   ~AudioDeviceThread();
 
-  // Starts the audio thread. The thread must not already be running.  If
-  // |sychronized_buffers| is set, the browser expects to be notified via the
-  // |socket| every time AudioDeviceThread::Process() completes.
-  void Start(AudioDeviceThread::Callback* callback,
-             base::SyncSocket::Handle socket,
-             const char* thread_name,
+  // Starts the audio thread and puts in wait mode. StartRun() must
+  // be called to release it and actually start running. The thread must not
+  // already be started.  If |sychronized_buffers| is set, the browser expects
+  // to be notified via the |socket| every time AudioDeviceThread::Process()
+  // completes.
+  void Start(const char* thread_name,
              bool synchronized_buffers);
 
   // This tells the audio thread to stop and clean up the data.
@@ -94,6 +94,16 @@ class MEDIA_EXPORT AudioDeviceThread {
   // If set to NULL, function will wait for the thread to exit before returning.
   void Stop(base::MessageLoop* loop_for_join);
 
+  // Releases the thread from wait mode so that it starts running with the given
+  // |callback| and |socket|. This will also reset the index used for
+  // sychronized buffers.
+  void StartRun(AudioDeviceThread::Callback* callback,
+                    base::SyncSocket::Handle socket);
+
+  // Stops running the thread, puts it in wait mode and shuts down the socket.
+  // It can then be started again with StartRun().
+  void StopRun();
+
   // Returns true if the thread is stopped or stopping.
   bool IsStopped();