Update WebKit IDLs after chrome roll.

dom/DocumentType.idl

 /*
  * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
-[
-    JSGenerateToNativeObject
-] interface DocumentType : Node {
+interface DocumentType : Node {
 
     // DOM Level 1
 
     readonly attribute DOMString name;
     readonly attribute NamedNodeMap entities;
     readonly attribute NamedNodeMap notations;
 
     // DOM Level 2
 
     [TreatReturnedNullStringAs=Null] readonly attribute DOMString publicId;
     [TreatReturnedNullStringAs=Null] readonly attribute DOMString systemId;
     [TreatReturnedNullStringAs=Null] readonly attribute DOMString internalSubset;        
 
     // DOM 4
     void remove()
         raises(DOMException);
 };