Update WebKit IDLs after chrome roll.

css/CSSValue.idl

 /*
  * Copyright (C) 2006, 2007, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Samuel Weinig <sam.weinig@gmail.com>
  *
  * 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.
  */
 
 [
     CustomToJSObject,
-    JSCustomIsReachable,
-    JSCustomFinalize,
     ObjCPolymorphic,
     V8DependentLifetime,
     ImplementationLacksVTable
 ] interface CSSValue {
 
     // UnitTypes
     const unsigned short CSS_INHERIT         = 0;
     const unsigned short CSS_PRIMITIVE_VALUE = 1;
     const unsigned short CSS_VALUE_LIST      = 2;
     const unsigned short CSS_CUSTOM          = 3;
 
              [TreatReturnedNullStringAs=Null, TreatNullAs=NullString] attribute DOMString cssText
                  setter raises(DOMException);
 
     readonly attribute unsigned short cssValueType;
 
 };