Allow AudioOutputDevice objects to be initialized with a specific hardware output device and store …

media/base/audio_renderer_sink.h

Index: media/base/audio_renderer_sink.h
diff --git a/media/base/audio_renderer_sink.h b/media/base/audio_renderer_sink.h
index 2d1b0aae4c0fa5e397646c0ee2775d3970675d66..1e091af94c56a8ca84b6558933b77899d696ca4d 100644
--- a/media/base/audio_renderer_sink.h
+++ b/media/base/audio_renderer_sink.h
@@ -53,7 +53,8 @@ class AudioRendererSink
   // Starts audio playback.
   virtual void Start() = 0;
 
-  // Stops audio playback.
+  // Stops audio playback and performs cleanup. It must be called before
+  // destruction.
   virtual void Stop() = 0;
 
   // Pauses playback.