Set a bit on Custom Elements on creation to simplify wrapping

Source/bindings/v8/CustomElementHelpers.h

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 70 matching lines @@
         CreateSVGWrapperFunction m_svg;
         CreateHTMLWrapperFunction m_html;
     };
 
     // You can just use toV8(Node*) to get correct wrapper objects,
     // even for custom elements.  Then generated
     // ElementWrapperFactories call V8CustomElement::wrap() with
     // proper prototype instances accordingly.
     static v8::Handle<v8::Object> wrap(Element*, v8::Handle<v8::Object> creationContext, v8::Isolate*, const CreateWrapperFunction& createTypeExtensionUpgradeCandidateWrapper);
 
-    static bool isCustomElement(Element*);
-
 private:
     static void invokeReadyCallbackIfNeeded(Element*, v8::Handle<v8::Context>);
     static v8::Handle<v8::Object> createWrapper(PassRefPtr<Element>, v8::Handle<v8::Object>, v8::Isolate*, const CreateWrapperFunction& createTypeExtensionUpgradeCandidateWrapper);
     static v8::Handle<v8::Object> createUpgradeCandidateWrapper(PassRefPtr<Element>, v8::Handle<v8::Object> creationContext, v8::Isolate*, const CreateWrapperFunction& createTypeExtensionUpgradeCandidateWrapper);
 };
 
 inline v8::Handle<v8::Object> CustomElementHelpers::wrap(Element* impl, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate, const CreateWrapperFunction& createWrapper)
 {
     ASSERT(impl);
     ASSERT(DOMDataStore::getWrapper(impl, isolate).IsEmpty());
     return CustomElementHelpers::createWrapper(impl, creationContext, isolate, createWrapper);
 }
 
 inline bool CustomElementHelpers::isValidPrototypeParameter(const ScriptValue& value, ScriptState* state)
 {
     AtomicString namespaceURI;
     return isValidPrototypeParameter(value, state, namespaceURI);
 }
 
 } // namespace WebCore
 
 #endif // CustomElementHelpers_h