Remove [TreatNullAs=NullString] from the 'dir' attribute on Document

third_party/WebKit/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 79 matching lines @@
     [PutForwards=href, Unforgeable] readonly attribute Location? location;
     [RaisesException=Setter] attribute DOMString domain;
     readonly attribute DOMString referrer;
     // FIXME: cookie should not have [TreatNullAs=NullString].
     [TreatNullAs=NullString, RaisesException] attribute DOMString cookie;
     readonly attribute DOMString lastModified;
     readonly attribute DocumentReadyState readyState;
 
     // DOM tree accessors
     [CustomElementCallbacks] attribute DOMString title;
-    // FIXME: dir should not have [TreatNullAs=NullString].
-    [TreatNullAs=NullString, CustomElementCallbacks] attribute DOMString dir;
+    [CustomElementCallbacks] attribute DOMString dir;
     [RaisesException=Setter, CustomElementCallbacks, PerWorldBindings, TypeChecking=Interface] attribute HTMLElement? body;
     readonly attribute HTMLHeadElement? head;
     [SameObject] readonly attribute HTMLCollection images;
     [SameObject] readonly attribute HTMLCollection embeds;
     [SameObject, ImplementedAs=embeds] readonly attribute HTMLCollection plugins;
     [SameObject] readonly attribute HTMLCollection links;
     [SameObject] readonly attribute HTMLCollection forms;
     [SameObject] readonly attribute HTMLCollection scripts;
     [PerWorldBindings] NodeList getElementsByName(DOMString elementName);
     readonly attribute HTMLScriptElement? currentScript;
@@ skipping 103 matching lines @@
     attribute EventHandler onsearch;
     [RuntimeEnabled=ExperimentalContentSecurityPolicyFeatures] attribute EventHandler onsecuritypolicyviolation;
     attribute EventHandler onselectionchange;
     attribute EventHandler onselectstart;
     attribute EventHandler onwheel;
 };
 
 Document implements GlobalEventHandlers;
 Document implements ParentNode;
 Document implements NonElementParentNode;