Fixing Node.clone returning non-upgraded Dart custom elements.

Source/bindings/dart/custom/DartNodeCustom.cpp

 // Copyright 2011, 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 25 matching lines @@
 #include "DartDocument.h"
 #include "DartDocumentFragment.h"
 #include "DartDocumentType.h"
 #include "DartElement.h"
 #include "DartEntity.h"
 #include "DartNode.h"
 #include "DartNotation.h"
 #include "DartProcessingInstruction.h"
 #include "DartText.h"
 #include "bindings/dart/DartDOMWrapper.h"
+#include "core/dom/CustomElementCallbackDispatcher.h"
 
 namespace WebCore {
 
 namespace DartNodeInternal {
 
 // This function is customized to take advantage of the optional 4th argument: shouldLazyAttach.
 void insertBeforeCallback(Dart_NativeArguments args)
 {
     Dart_Handle exception = 0;
     {
@@ skipping 101 matching lines @@
 
         DartDOMWrapper::returnToDart<DartNode>(args, child);
         return;
     }
 
 fail:
     Dart_ThrowException(exception);
     ASSERT_NOT_REACHED();
 }
 
+void cloneNodeCallback(Dart_NativeArguments args)
+{
+    Dart_Handle exception = 0;
+    {
+        Node* receiver = DartDOMWrapper::receiver< Node >(args);
+
+        bool deep = DartUtilities::dartToBool(args, 1, exception);
+        if (exception)
+            goto fail;
+
+        RefPtr<Node> result;
+        {
+            CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
+
+            result = receiver->cloneNode(deep);
+        }
+
+        DartNode::returnToDart(args, result);
+        return;
+    }
+
+fail:
+    Dart_ThrowException(exception);
+    ASSERT_NOT_REACHED();
+}
+
 }
 
 Dart_Handle DartNode::createWrapper(Node* node)
 {
     if (!node)
         return Dart_Null();
 
     switch (node->nodeType()) {
     case Node::ELEMENT_NODE:
         return DartElement::createWrapper(static_cast<Element*>(node));
@@ skipping 16 matching lines @@
     case Node::DOCUMENT_FRAGMENT_NODE:
         return DartDocumentFragment::createWrapper(static_cast<DocumentFragment*>(node));
     case Node::NOTATION_NODE:
         return DartNotation::createWrapper(static_cast<Notation*>(node));
     default: break; // XPATH_NAMESPACE_NODE
     }
     return DartDOMWrapper::createWrapper<DartNode>(node);
 }
 
 }