Roll IDLs.

html/track/TextTrack.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 27 matching lines @@
     attribute DOMString mode;
 
     readonly attribute TextTrackCueList cues;
     readonly attribute TextTrackCueList activeCues;
              attribute EventListener oncuechange;
 
     void addCue(in TextTrackCue cue);
     void removeCue(in TextTrackCue cue)
         raises (DOMException);
 
+#if defined(ENABLE_WEBVTT_REGIONS) && ENABLE_WEBVTT_REGIONS
+    readonly attribute TextTrackRegionList regions;
+    void addRegion(in TextTrackRegion region);
+    void removeRegion(in TextTrackRegion region)
+        raises (DOMException);
+#endif
+
     // EventTarget interface
     void addEventListener(in DOMString type, 
                           in EventListener listener, 
                           in [Optional] boolean useCapture);
     void removeEventListener(in DOMString type, 
                              in EventListener listener, 
                              in [Optional] boolean useCapture);
     boolean dispatchEvent(in Event evt)
         raises(EventException);
 };