MediaStream API: Changing the device enumeration to be async

Source/modules/mediastream/MediaStreamTrack.idl

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 19 matching lines @@
     readonly attribute DOMString id;
     readonly attribute DOMString label;
              attribute boolean enabled;
 
     readonly attribute DOMString readyState;
 
     attribute EventListener onmute;
     attribute EventListener onunmute;
     attribute EventListener onended;
 
-    [CallWith=ScriptExecutionContext, RaisesException] static sequence<SourceInfo> getSourceInfos();
+    [CallWith=ScriptExecutionContext, RaisesException] static void getSources(MediaStreamTrackSourcesCallback callback);
 
     // EventTarget interface
     void addEventListener(DOMString type,
                           EventListener listener,
                           optional boolean useCapture);
     void removeEventListener(DOMString type,
                              EventListener listener,
                              optional boolean useCapture);
     [RaisesException] boolean dispatchEvent(Event event);
 };