Sync Document.readyState with the HTML spec

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,
  * 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;
 
+// https://html.spec.whatwg.org/#the-document-object
+enum DocumentReadyState { "loading", "interactive", "complete" };
+
 // http://www.w3.org/TR/page-visibility/#VisibilityState
 enum VisibilityState { "hidden", "visible", "prerender", "unloaded" };
 
 // https://dom.spec.whatwg.org/#interface-document
 
 // FIXME: Document should have a constructor.
 interface Document : Node {
     [SameObject] readonly attribute DOMImplementation implementation;
     readonly attribute DOMString URL;
     // FIXME: documentURI should not be nullable.
@@ skipping 46 matching lines @@
     // https://html.spec.whatwg.org/#the-document-object
 
     // resource metadata management
     [PutForwards=href, Unforgeable] readonly attribute Location? location;
     // FIXME: domain should not have [TreatNullAs=NullString].
     [TreatNullAs=NullString, 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;
-    // FIXME: readyState should use the enum DocumentReadyState.
-    // FIXME: readyState should not have [TreatReturnedNullStringAs=Undefined].
-    [TreatReturnedNullStringAs=Undefined] readonly attribute DOMString readyState;
+    readonly attribute DocumentReadyState readyState;
 
     // DOM tree accessors
     // FIXME: title and dir should not have [TreatNullAs=NullString].
     [TreatNullAs=NullString, CustomElementCallbacks] attribute DOMString title;
     [TreatNullAs=NullString, CustomElementCallbacks] attribute DOMString dir;
     [RaisesException=Setter, CustomElementCallbacks, PerWorldBindings, TypeChecking=Interface, ExposeJSAccessors] attribute HTMLElement? body;
     readonly attribute HTMLHeadElement? head;
     [SameObject] readonly attribute HTMLCollection images;
     [SameObject] readonly attribute HTMLCollection embeds;
     [SameObject, ImplementedAs=embeds] readonly attribute HTMLCollection plugins;
@@ skipping 114 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;