Inherit EventTarget interface instead of duplicating its code

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 67 matching lines @@
     if (CustomElementRegistry::isCustomTagName(element->localName()))
         return createDirectWrapper(element, creationContext, isolate);
     if (createSpecificWrapper)
         return createSpecificWrapper(element, creationContext, isolate);
     return createFallbackWrapper(element, creationContext, isolate);
 }
 
 template<typename ElementType>
 v8::Handle<v8::Object> CustomElementWrapper<ElementType>::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(element.get(), isolate).IsEmpty());
+    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();
 
     CustomElementRegistry* registry = element->document()->registry();
     RefPtr<CustomElementDefinition> definition = registry->findFor(element.get());
     if (!element->isUpgradedCustomElement() || !definition)
         return createUpgradeCandidateWrapper(element.get(), creationContext, isolate, createSpecificWrapper);
 
     V8PerContextData* perContextData = V8PerContextData::from(context);
     if (!perContextData)
         return v8::Handle<v8::Object>();
 
     CustomElementBinding* customElementBinding = perContextData->customElementBinding(definition->type());
 
     v8::Handle<v8::Object> wrapper = V8DOMWrapper::createWrapper(creationContext, customElementBinding->wrapperType(), element.get(), isolate);
     if (wrapper.IsEmpty())
         return v8::Handle<v8::Object>();
 
     wrapper->SetPrototype(customElementBinding->prototype());
 
-    V8DOMWrapper::associateObjectWithWrapper(element, customElementBinding->wrapperType(), wrapper, isolate, WrapperConfiguration::Dependent);
+    V8DOMWrapper::associateObjectWithWrapper<V8Element>(element, customElementBinding->wrapperType(), wrapper, isolate, WrapperConfiguration::Dependent);
     return wrapper;
 }
 
 template
 class CustomElementWrapper<HTMLElement>;
 
 template
 class CustomElementWrapper<SVGElement>;
 
 } // namespace WebCore