Make DOMWrapperWorld::current() return a reference instead of a pointer

Source/bindings/v8/CustomElementConstructorBuilder.cpp

 /*
  * Copyright (C) 2013 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 48 matching lines @@
 CustomElementConstructorBuilder::CustomElementConstructorBuilder(ScriptState* state, const Dictionary* options)
     : m_context(state->context())
     , m_options(options)
     , m_wrapperType(0)
 {
     ASSERT(m_context == v8::Isolate::GetCurrent()->GetCurrentContext());
 }
 
 bool CustomElementConstructorBuilder::isFeatureAllowed() const
 {
-    return DOMWrapperWorld::world(m_context)->isMainWorld();
+    return DOMWrapperWorld::world(m_context).isMainWorld();
 }
 
 bool CustomElementConstructorBuilder::validateOptions(const AtomicString& type, QualifiedName& tagName, ExceptionState& exceptionState)
 {
     ASSERT(m_prototype.IsEmpty());
 
     ScriptValue prototypeScriptValue;
     if (m_options->get("prototype", prototypeScriptValue) && !prototypeScriptValue.isNull()) {
         if (!prototypeScriptValue.isObject()) {
             CustomElementException::throwException(CustomElementException::PrototypeNotAnObject, type, exceptionState);
@@ skipping 197 matching lines @@
 
     ExceptionState exceptionState(ExceptionState::ConstructionContext, "CustomElement", info.Holder(), info.GetIsolate());
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     RefPtr<Element> element = document->createElementNS(namespaceURI, tagName, maybeType->IsNull() ? nullAtom : type, exceptionState);
     if (exceptionState.throwIfNeeded())
         return;
     v8SetReturnValueFast(info, element.release(), document);
 }
 
 } // namespace WebCore