Set a bit on Custom Elements on creation to simplify wrapping

Source/bindings/v8/CustomElementHelpers.cpp

 /*
  * 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 226 matching lines @@
         return 0;
     if (const QualifiedName* htmlName = findHTMLTagNameOfV8Type(type))
         return htmlName;
 #if ENABLE(SVG)
     if (const QualifiedName* svgName = findSVGTagNameOfV8Type(type))
         return svgName;
 #endif
     return 0;
 }
 
-bool CustomElementHelpers::isCustomElement(Element* element)
-{
-    // FIXME: This dynamically consults the "is" attribute; instead a
-    // bit should be marked on elements that are Custom Elements
-    return CustomElementRegistry::isCustomTagName(element->localName()) || CustomElementRegistry::isCustomTagName(element->getAttribute(HTMLNames::isAttr));
-}
-
 void CustomElementHelpers::invokeReadyCallbackIfNeeded(Element* element, v8::Handle<v8::Context> context)
 {
     v8::Handle<v8::Value> wrapperValue = toV8(element, context->Global(), context->GetIsolate());
     if (wrapperValue.IsEmpty() || !wrapperValue->IsObject())
         return;
     v8::Handle<v8::Object> wrapper = v8::Handle<v8::Object>::Cast(wrapperValue);
     v8::Handle<v8::Value> prototypeValue = wrapper->GetPrototype();
     if (prototypeValue.IsEmpty() || !prototypeValue->IsObject())
         return;
     v8::Handle<v8::Object> prototype = v8::Handle<v8::Object>::Cast(prototypeValue);
@@ skipping 19 matching lines @@
         return;
     v8::Context::Scope scope(context);
 
     for (size_t i = 0; i < invocations.size(); ++i) {
         ASSERT(executionContext == invocations[i].element()->document());
         invokeReadyCallbackIfNeeded(invocations[i].element(), context);
     }
 }
 
 } // namespace WebCore