Morph the APIs for Node, ParentNode, and Element closer to the specs

sky/engine/core/dom/Document.idl

 /*
  * Copyright (C) 2006, 2007, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2006, 2007 Samuel Weinig <sam@webkit.org>
  *
  * 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.
  */
 
 callback CustomElementConstructor = Element ();
 
 typedef (CanvasRenderingContext2D or WebGLRenderingContext) RenderingContext;
 
 [
     Constructor(),
     ConstructorCallWith=Document,
-] interface Document : Node {
+] interface Document : ParentNode {
     readonly attribute Element documentElement;
 
     [CustomElementCallbacks, RaisesException] Element createElement(DOMString tagName);
     DocumentFragment createDocumentFragment();
 
     [CustomElementCallbacks, RaisesException, TypeChecking=Interface] Node importNode(Node node, optional boolean deep = false);
 
     Element getElementById(DOMString elementId);
 
     [RaisesException, CustomElementCallbacks, TypeChecking=Interface] Node adoptNode(Node node);
@@ skipping 29 matching lines @@
 
     // FIXME(Dictionary): options
     // [CallWith=ScriptState, CustomElementCallbacks, RaisesException] CustomElementConstructor registerElement(DOMString name);
 
     // Page visibility API.
     readonly attribute DOMString visibilityState;
     readonly attribute boolean hidden;
 
     readonly attribute HTMLScriptElement currentScript;
 };
-
-Document implements ParentNode;