Remove IME API from Blink

Source/core/events/CompositionEvent.idl

 /*
  * Copyright (C) 2009 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 13 matching lines @@
  */
 
 // http://www.w3.org/TR/DOM-Level-3-Events/#interface-CompositionEvent
 
 [
     Constructor(DOMString type, optional CompositionEventInit eventInitDict),
 ] interface CompositionEvent : UIEvent {
 
     readonly attribute DOMString data;
 
-    [RuntimeEnabled=IMEAPI] readonly attribute long activeSegmentStart;
-    [RuntimeEnabled=IMEAPI] readonly attribute long activeSegmentEnd;
-    [RuntimeEnabled=IMEAPI] sequence<unsigned long> getSegments();
-
     void initCompositionEvent([Default=Undefined] optional DOMString typeArg,
                               [Default=Undefined] optional boolean canBubbleArg,
                               [Default=Undefined] optional boolean cancelableArg,
                               [Default=Undefined] optional Window viewArg,
                               [Default=Undefined] optional DOMString dataArg);
 
 };