Remove [TypeChecking=Unrestricted] use in Source/core/

Source/core/html/MediaController.idl

 /*
  * Copyright (C) 2011 Apple 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 11 matching lines @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 // http://www.whatwg.org/specs/web-apps/current-work/multipage/the-video-element.html#mediacontroller
 
 [
     Constructor,
     ConstructorCallWith=ExecutionContext,
     RuntimeEnabled=MediaController,
-    TypeChecking=Unrestricted,
 ] interface MediaController : EventTarget {
     readonly attribute TimeRanges buffered;
     readonly attribute TimeRanges seekable;
 
     readonly attribute unrestricted double duration;
     attribute double currentTime;
 
     readonly attribute boolean paused;
     readonly attribute TimeRanges played;
     readonly attribute DOMString playbackState;
     void play();
     void pause();
     void unpause();
 
     attribute double defaultPlaybackRate;
     attribute double playbackRate;
 
     [RaisesException=Setter] attribute double volume;
     attribute boolean muted;
 };