Move popular DOM attributes to prorotype chains

Source/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,
@@ skipping 96 matching lines @@
 
     // Moved down from HTMLDocument
 
              [TreatNullAs=NullString, CustomElementCallbacks] attribute DOMString title;
     readonly attribute DOMString referrer;
              [TreatNullAs=NullString, RaisesException=Setter] attribute DOMString domain;
     readonly attribute DOMString URL;
 
              [TreatNullAs=NullString, RaisesException] attribute DOMString cookie;
 
-             [RaisesException=Setter, CustomElementCallbacks] attribute HTMLElement body;
+             [RaisesException=Setter, CustomElementCallbacks, ExposeJSAccessors] attribute HTMLElement body;
 
     readonly attribute HTMLHeadElement head;
     readonly attribute HTMLCollection images;
     readonly attribute HTMLCollection applets;
     readonly attribute HTMLCollection links;
     readonly attribute HTMLCollection forms;
     readonly attribute HTMLCollection anchors;
     readonly attribute DOMString lastModified;
 
     [PerWorldBindings] NodeList getElementsByName([Default=Undefined] optional DOMString elementName);
@@ skipping 87 matching lines @@
     [MeasureAs=PrefixedPageVisibility, ImplementedAs=hidden] readonly attribute boolean webkitHidden;
 
     // Security Policy API: http://dvcs.w3.org/hg/content-security-policy/raw-file/tip/csp-specification.dev.html#script-interfaces
     [RuntimeEnabled=ExperimentalContentSecurityPolicyFeatures] readonly attribute SecurityPolicy securityPolicy;
 
     readonly attribute HTMLScriptElement currentScript;
 };
 
 Document implements GlobalEventHandlers;
 Document implements ParentNode;