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

Source/core/animation/AnimationPlayer.idl

 /*
  * Copyright (C) 2013 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 15 matching lines @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 enum AnimationPlayState { "idle", "pending", "running", "paused", "finished" };
 
 [
     ActiveDOMObject,
     NoInterfaceObject,
-    TypeChecking=Unrestricted,
 ] interface AnimationPlayer : EventTarget {
     [RuntimeEnabled=WebAnimationsAPI] attribute AnimationNode? source;
     attribute double?    startTime;
     attribute double?    currentTime;
     attribute double     playbackRate;
     [MeasureAs=AnimationPlayerGetPlayState] readonly attribute AnimationPlayState playState;
     [MeasureAs=AnimationPlayerFinish, RaisesException] void finish();
     [MeasureAs=AnimationPlayerPlay] void play();
     [MeasureAs=AnimationPlayerPause] void pause();
     [MeasureAs=AnimationPlayerReverse] void reverse();
 
     void cancel();
     [MeasureAs=AnimationPlayerFinishEvent] attribute EventHandler onfinish;
     [RuntimeEnabled=WebAnimationsAPI, CallWith=ScriptState] readonly attribute Promise<AnimationPlayer> finished;
     [RuntimeEnabled=WebAnimationsAPI, CallWith=ScriptState] readonly attribute Promise<AnimationPlayer> ready;
 };