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

Source/bindings/v8/CustomElementWrapper.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 77 matching lines @@
 template<typename ElementType, typename WrapperType>
 v8::Handle<v8::Object> CustomElementWrapper<ElementType, WrapperType>::wrap(PassRefPtr<ElementType> element, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate, v8::Handle<v8::Object> (*createSpecificWrapper)(ElementType* element, v8::Handle<v8::Object> creationContext, v8::Isolate*))
 {
     ASSERT(DOMDataStore::getWrapper<V8Element>(element.get(), isolate).IsEmpty());
 
     // FIXME: creationContext.IsEmpty() should never happen. Remove
     // this when callers (like InspectorController::inspect) are fixed
     // to never pass an empty creation context.
     v8::Handle<v8::Context> context = creationContext.IsEmpty() ? isolate->GetCurrentContext() : creationContext->CreationContext();
 
-    if (!element->isUpgradedCustomElement() || DOMWrapperWorld::world(context)->isIsolatedWorld())
+    if (!element->isUpgradedCustomElement() || DOMWrapperWorld::world(context).isIsolatedWorld())
         return createUpgradeCandidateWrapper(element.get(), creationContext, isolate, createSpecificWrapper);
 
     V8PerContextData* perContextData = V8PerContextData::from(context);
     if (!perContextData)
         return v8::Handle<v8::Object>();
 
     CustomElementBinding* binding = perContextData->customElementBinding(element->customElementDefinition());
     v8::Handle<v8::Object> wrapper = V8DOMWrapper::createWrapper(creationContext, binding->wrapperType(), element.get(), isolate);
     if (wrapper.IsEmpty())
         return v8::Handle<v8::Object>();
 
     wrapper->SetPrototype(binding->prototype());
 
     V8DOMWrapper::associateObjectWithWrapper<WrapperType>(element, binding->wrapperType(), wrapper, isolate, WrapperConfiguration::Dependent);
     return wrapper;
 }
 
 template
 class CustomElementWrapper<HTMLElement, V8HTMLElement>;
 
 template
 class CustomElementWrapper<SVGElement, V8SVGElement>;
 
 } // namespace WebCore