IDL: allow optional values to be undefined in overload resolution

Source/bindings/tests/results/V8TestInterfaceConstructor2.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 88 matching lines @@
     V8DOMWrapper::associateObjectWithWrapper<V8TestInterfaceConstructor2>(impl.release(), &V8TestInterfaceConstructor2::wrapperTypeInfo, wrapper, info.GetIsolate(), WrapperConfiguration::Dependent);
     v8SetReturnValue(info, wrapper);
 }
 
 static void constructor(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (((info.Length() == 1))) {
         TestInterfaceConstructor2V8Internal::constructor1(info);
         return;
     }
-    if (((info.Length() == 1) && (V8TestInterfaceEmpty::hasInstance(info[0], info.GetIsolate()))) || ((info.Length() == 2) && (V8TestInterfaceEmpty::hasInstance(info[0], info.GetIsolate()))) || ((info.Length() == 3) && (V8TestInterfaceEmpty::hasInstance(info[0], info.GetIsolate()))) || ((info.Length() == 4) && (V8TestInterfaceEmpty::hasInstance(info[0], info.GetIsolate())) && (info[3]->IsObject()))) {
+    if (((info.Length() == 1) && (V8TestInterfaceEmpty::hasInstance(info[0], info.GetIsolate()))) || ((info.Length() == 2) && (V8TestInterfaceEmpty::hasInstance(info[0], info.GetIsolate()))) || ((info.Length() == 3) && (V8TestInterfaceEmpty::hasInstance(info[0], info.GetIsolate()))) || ((info.Length() == 4) && (V8TestInterfaceEmpty::hasInstance(info[0], info.GetIsolate())) && (info[3]->IsUndefined() || info[3]->IsObject()))) {
         TestInterfaceConstructor2V8Internal::constructor2(info);
         return;
     }
     ExceptionState exceptionState(ExceptionState::ConstructionContext, "TestInterfaceConstructor2", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         exceptionState.throwTypeError(ExceptionMessages::notEnoughArguments(1, info.Length()));
         exceptionState.throwIfNeeded();
         return;
     }
     exceptionState.throwTypeError("No matching constructor signature.");
@@ skipping 83 matching lines @@
     fromInternalPointer(object)->deref();
 }
 
 template<>
 v8::Handle<v8::Value> toV8NoInline(TestInterfaceConstructor2* impl, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
 {
     return toV8(impl, creationContext, isolate);
 }
 
 } // namespace WebCore