Node.appendChild should throw TypeError when newChild is omitted

Source/bindings/core/v8/custom/V8NodeCustom.cpp

 /*
  * Copyright (C) 2007-2009 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 90 matching lines @@
     Node* oldChild = V8Node::toNativeWithTypeCheck(info.GetIsolate(), info[0]);
     impl->removeChild(oldChild, exceptionState);
     if (exceptionState.throwIfNeeded())
         return;
     v8SetReturnValue(info, info[0]);
 }
 
 void V8Node::appendChildMethodCustom(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "appendChild", "Node", info.Holder(), info.GetIsolate());
+    if (UNLIKELY(info.Length() < 1)) {
+        throwMinimumArityTypeErrorForMethod("appendChild", "Node", 1, info.Length(), info.GetIsolate());
+        return;
+    }
     Node* impl = V8Node::toNative(info.Holder());
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     Node* newChild;
     {
         v8::TryCatch block;
         V8RethrowTryCatchScope rethrow(block);
         if (info.Length() > 0 && !V8Node::hasInstance(info[0], info.GetIsolate())) {
             exceptionState.throwTypeError("parameter 1 is not of type 'Node'.");
             exceptionState.throwIfNeeded();
             return;
@@ skipping 35 matching lines @@
         return wrap(toDocumentType(impl), creationContext, isolate);
     case Node::DOCUMENT_FRAGMENT_NODE:
         if (impl->isShadowRoot())
             return wrap(toShadowRoot(impl), creationContext, isolate);
         return wrap(toDocumentFragment(impl), creationContext, isolate);
     }
     ASSERT_NOT_REACHED();
     return V8Node::createWrapper(impl, creationContext, isolate);
 }
 } // namespace WebCore