Add "Failed" custom element state

third_party/WebKit/Source/core/dom/Element.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003-2011, 2013, 2014 Apple Inc. All rights reserved.
  *
  * 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
@@ skipping 358 matching lines @@
 
     const ComputedStyle* ensureComputedStyle(PseudoId = PseudoIdNone);
 
     // Methods for indicating the style is affected by dynamic updates (e.g., children changing, our position changing in our sibling list, etc.)
     bool styleAffectedByEmpty() const { return hasElementFlag(StyleAffectedByEmpty); }
     void setStyleAffectedByEmpty() { setElementFlag(StyleAffectedByEmpty); }
 
     void setIsInCanvasSubtree(bool value) { setElementFlag(IsInCanvasSubtree, value); }
     bool isInCanvasSubtree() const { return hasElementFlag(IsInCanvasSubtree); }
 
-    bool isDefined() const { return getCustomElementState() != CustomElementState::Undefined; }
+    bool isDefined() const { return !(static_cast<int>(getCustomElementState()) & static_cast<int>(CustomElementState::NotDefinedFlag)); }
     bool isUpgradedV0CustomElement() { return getV0CustomElementState() == V0Upgraded; }
     bool isUnresolvedV0CustomElement() { return getV0CustomElementState() == V0WaitingForUpgrade; }
 
     AtomicString computeInheritedLanguage() const;
     Locale& locale() const;
 
     virtual void accessKeyAction(bool /*sendToAnyEvent*/) { }
 
     virtual bool isURLAttribute(const Attribute&) const { return false; }
     virtual bool isHTMLContentAttribute(const Attribute&) const { return false; }
@@ skipping 583 matching lines @@
     static T* create(const QualifiedName&, Document&)
 #define DEFINE_ELEMENT_FACTORY_WITH_TAGNAME(T) \
     T* T::create(const QualifiedName& tagName, Document& document) \
     { \
         return new T(tagName, document); \
     }
 
 } // namespace blink
 
 #endif // Element_h