V8 Binding: Introduce toNativeWithTypeCheck

Source/bindings/tests/results/V8TestObjectPython.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 529 matching lines @@
 static void testInterfaceEmptyAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::testInterfaceEmptyAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void testInterfaceEmptyAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TestObjectPython* imp = V8TestObjectPython::toNative(info.Holder());
-    V8TRYCATCH_VOID(TestInterfaceEmpty*, cppValue, V8TestInterfaceEmpty::hasInstance(jsValue, info.GetIsolate()) ? V8TestInterfaceEmpty::toNative(v8::Handle<v8::Object>::Cast(jsValue)) : 0);
+    V8TRYCATCH_VOID(TestInterfaceEmpty*, cppValue, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), jsValue));
     imp->setTestInterfaceEmptyAttribute(WTF::getPtr(cppValue));
 }
 
 static void testInterfaceEmptyAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::testInterfaceEmptyAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void testObjectPythonAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TestObjectPython* imp = V8TestObjectPython::toNative(info.Holder());
     v8SetReturnValueFast(info, imp->testObjectPythonAttribute(), imp);
 }
 
 static void testObjectPythonAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::testObjectPythonAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void testObjectPythonAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TestObjectPython* imp = V8TestObjectPython::toNative(info.Holder());
-    V8TRYCATCH_VOID(TestObjectPython*, cppValue, V8TestObjectPython::hasInstance(jsValue, info.GetIsolate()) ? V8TestObjectPython::toNative(v8::Handle<v8::Object>::Cast(jsValue)) : 0);
+    V8TRYCATCH_VOID(TestObjectPython*, cppValue, V8TestObjectPython::toNativeWithTypeCheck(info.GetIsolate(), jsValue));
     imp->setTestObjectPythonAttribute(WTF::getPtr(cppValue));
 }
 
 static void testObjectPythonAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::testObjectPythonAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
@@ skipping 307 matching lines @@
 static void documentAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::documentAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void documentAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TestObjectPython* imp = V8TestObjectPython::toNative(info.Holder());
-    V8TRYCATCH_VOID(Document*, cppValue, V8Document::hasInstance(jsValue, info.GetIsolate()) ? V8Document::toNative(v8::Handle<v8::Object>::Cast(jsValue)) : 0);
+    V8TRYCATCH_VOID(Document*, cppValue, V8Document::toNativeWithTypeCheck(info.GetIsolate(), jsValue));
     imp->setDocumentAttribute(WTF::getPtr(cppValue));
 }
 
 static void documentAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::documentAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void documentFragmentAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TestObjectPython* imp = V8TestObjectPython::toNative(info.Holder());
     v8SetReturnValueFast(info, imp->documentFragmentAttribute(), imp);
 }
 
 static void documentFragmentAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::documentFragmentAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void documentFragmentAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TestObjectPython* imp = V8TestObjectPython::toNative(info.Holder());
-    V8TRYCATCH_VOID(DocumentFragment*, cppValue, V8DocumentFragment::hasInstance(jsValue, info.GetIsolate()) ? V8DocumentFragment::toNative(v8::Handle<v8::Object>::Cast(jsValue)) : 0);
+    V8TRYCATCH_VOID(DocumentFragment*, cppValue, V8DocumentFragment::toNativeWithTypeCheck(info.GetIsolate(), jsValue));
     imp->setDocumentFragmentAttribute(WTF::getPtr(cppValue));
 }
 
 static void documentFragmentAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::documentFragmentAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void documentTypeAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TestObjectPython* imp = V8TestObjectPython::toNative(info.Holder());
     v8SetReturnValueFast(info, imp->documentTypeAttribute(), imp);
 }
 
 static void documentTypeAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::documentTypeAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void documentTypeAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TestObjectPython* imp = V8TestObjectPython::toNative(info.Holder());
-    V8TRYCATCH_VOID(DocumentType*, cppValue, V8DocumentType::hasInstance(jsValue, info.GetIsolate()) ? V8DocumentType::toNative(v8::Handle<v8::Object>::Cast(jsValue)) : 0);
+    V8TRYCATCH_VOID(DocumentType*, cppValue, V8DocumentType::toNativeWithTypeCheck(info.GetIsolate(), jsValue));
     imp->setDocumentTypeAttribute(WTF::getPtr(cppValue));
 }
 
 static void documentTypeAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::documentTypeAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void elementAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TestObjectPython* imp = V8TestObjectPython::toNative(info.Holder());
     v8SetReturnValueFast(info, imp->elementAttribute(), imp);
 }
 
 static void elementAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::elementAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void elementAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TestObjectPython* imp = V8TestObjectPython::toNative(info.Holder());
-    V8TRYCATCH_VOID(Element*, cppValue, V8Element::hasInstance(jsValue, info.GetIsolate()) ? V8Element::toNative(v8::Handle<v8::Object>::Cast(jsValue)) : 0);
+    V8TRYCATCH_VOID(Element*, cppValue, V8Element::toNativeWithTypeCheck(info.GetIsolate(), jsValue));
     imp->setElementAttribute(WTF::getPtr(cppValue));
 }
 
 static void elementAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::elementAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void nodeAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TestObjectPython* imp = V8TestObjectPython::toNative(info.Holder());
     v8SetReturnValueFast(info, imp->nodeAttribute(), imp);
 }
 
 static void nodeAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::nodeAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void nodeAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TestObjectPython* imp = V8TestObjectPython::toNative(info.Holder());
-    V8TRYCATCH_VOID(Node*, cppValue, V8Node::hasInstance(jsValue, info.GetIsolate()) ? V8Node::toNative(v8::Handle<v8::Object>::Cast(jsValue)) : 0);
+    V8TRYCATCH_VOID(Node*, cppValue, V8Node::toNativeWithTypeCheck(info.GetIsolate(), jsValue));
     imp->setNodeAttribute(WTF::getPtr(cppValue));
 }
 
 static void nodeAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::nodeAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void shadowRootAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TestObjectPython* imp = V8TestObjectPython::toNative(info.Holder());
     v8SetReturnValueFast(info, imp->shadowRootAttribute(), imp);
 }
 
 static void shadowRootAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::shadowRootAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void shadowRootAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TestObjectPython* imp = V8TestObjectPython::toNative(info.Holder());
-    V8TRYCATCH_VOID(ShadowRoot*, cppValue, V8ShadowRoot::hasInstance(jsValue, info.GetIsolate()) ? V8ShadowRoot::toNative(v8::Handle<v8::Object>::Cast(jsValue)) : 0);
+    V8TRYCATCH_VOID(ShadowRoot*, cppValue, V8ShadowRoot::toNativeWithTypeCheck(info.GetIsolate(), jsValue));
     imp->setShadowRootAttribute(WTF::getPtr(cppValue));
 }
 
 static void shadowRootAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::shadowRootAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
@@ skipping 306 matching lines @@
 static void nullableTestInterfaceAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::nullableTestInterfaceAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void nullableTestInterfaceAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TestObjectPython* imp = V8TestObjectPython::toNative(info.Holder());
-    V8TRYCATCH_VOID(TestInterface*, cppValue, V8TestInterface::hasInstance(jsValue, info.GetIsolate()) ? V8TestInterface::toNative(v8::Handle<v8::Object>::Cast(jsValue)) : 0);
+    V8TRYCATCH_VOID(TestInterface*, cppValue, V8TestInterface::toNativeWithTypeCheck(info.GetIsolate(), jsValue));
     imp->setNullableTestInterfaceAttribute(WTF::getPtr(cppValue));
 }
 
 static void nullableTestInterfaceAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::nullableTestInterfaceAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
@@ skipping 1388 matching lines @@
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::raisesExceptionTestInterfaceEmptyAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void raisesExceptionTestInterfaceEmptyAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     ExceptionState exceptionState(ExceptionState::SetterContext, "raisesExceptionTestInterfaceEmptyAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
     TestObjectPython* imp = V8TestObjectPython::toNative(info.Holder());
-    V8TRYCATCH_VOID(TestInterfaceEmpty*, cppValue, V8TestInterfaceEmpty::hasInstance(jsValue, info.GetIsolate()) ? V8TestInterfaceEmpty::toNative(v8::Handle<v8::Object>::Cast(jsValue)) : 0);
+    V8TRYCATCH_VOID(TestInterfaceEmpty*, cppValue, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), jsValue));
     imp->setRaisesExceptionTestInterfaceEmptyAttribute(WTF::getPtr(cppValue), exceptionState);
     exceptionState.throwIfNeeded();
 }
 
 static void raisesExceptionTestInterfaceEmptyAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::raisesExceptionTestInterfaceEmptyAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
@@ skipping 50 matching lines @@
 static void reflectTestInterfaceAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::reflectTestInterfaceAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void reflectTestInterfaceAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TestObjectPython* imp = V8TestObjectPython::toNative(info.Holder());
-    V8TRYCATCH_VOID(TestInterface*, cppValue, V8TestInterface::hasInstance(jsValue, info.GetIsolate()) ? V8TestInterface::toNative(v8::Handle<v8::Object>::Cast(jsValue)) : 0);
+    V8TRYCATCH_VOID(TestInterface*, cppValue, V8TestInterface::toNativeWithTypeCheck(info.GetIsolate(), jsValue));
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     imp->setAttribute(HTMLNames::reflecttestinterfaceattributeAttr, WTF::getPtr(cppValue));
 }
 
 static void reflectTestInterfaceAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     TestObjectPythonV8Internal::reflectTestInterfaceAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void reflectReflectedNameAttributeTestAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TestObjectPython* imp = V8TestObjectPython::toNative(info.Holder());
     v8SetReturnValueFast(info, imp->fastGetAttribute(HTMLNames::reflectedNameAttributeAttr), imp);
 }
 
 static void reflectReflectedNameAttributeTestAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::reflectReflectedNameAttributeTestAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void reflectReflectedNameAttributeTestAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TestObjectPython* imp = V8TestObjectPython::toNative(info.Holder());
-    V8TRYCATCH_VOID(TestInterface*, cppValue, V8TestInterface::hasInstance(jsValue, info.GetIsolate()) ? V8TestInterface::toNative(v8::Handle<v8::Object>::Cast(jsValue)) : 0);
+    V8TRYCATCH_VOID(TestInterface*, cppValue, V8TestInterface::toNativeWithTypeCheck(info.GetIsolate(), jsValue));
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     imp->setAttribute(HTMLNames::reflectedNameAttributeAttr, WTF::getPtr(cppValue));
 }
 
 static void reflectReflectedNameAttributeTestAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     TestObjectPythonV8Internal::reflectReflectedNameAttributeTestAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
@@ skipping 775 matching lines @@
 
 static void strictTypeCheckingTestInterfaceAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     ExceptionState exceptionState(ExceptionState::SetterContext, "strictTypeCheckingTestInterfaceAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
     if (!isUndefinedOrNull(jsValue) && !V8TestInterface::hasInstance(jsValue, info.GetIsolate())) {
         exceptionState.throwTypeError("The provided value is not of type 'TestInterface'.");
         exceptionState.throwIfNeeded();
         return;
     }
     TestObjectPython* imp = V8TestObjectPython::toNative(info.Holder());
-    V8TRYCATCH_VOID(TestInterface*, cppValue, V8TestInterface::hasInstance(jsValue, info.GetIsolate()) ? V8TestInterface::toNative(v8::Handle<v8::Object>::Cast(jsValue)) : 0);
+    V8TRYCATCH_VOID(TestInterface*, cppValue, V8TestInterface::toNativeWithTypeCheck(info.GetIsolate(), jsValue));
     imp->setStrictTypeCheckingTestInterfaceAttribute(WTF::getPtr(cppValue));
 }
 
 static void strictTypeCheckingTestInterfaceAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::strictTypeCheckingTestInterfaceAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
@@ skipping 205 matching lines @@
 static void testInterfacePythonAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::testInterfacePythonAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void testInterfacePythonAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TestObjectPython* imp = V8TestObjectPython::toNative(info.Holder());
-    V8TRYCATCH_VOID(TestInterfacePythonImplementation*, cppValue, V8TestInterfacePython::hasInstance(jsValue, info.GetIsolate()) ? V8TestInterfacePython::toNative(v8::Handle<v8::Object>::Cast(jsValue)) : 0);
+    V8TRYCATCH_VOID(TestInterfacePythonImplementation*, cppValue, V8TestInterfacePython::toNativeWithTypeCheck(info.GetIsolate(), jsValue));
     imp->setTestInterfacePythonAttribute(WTF::getPtr(cppValue));
 }
 
 static void testInterfacePythonAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::testInterfacePythonAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
@@ skipping 12 matching lines @@
 static void testInterfaceWillBeGarbageCollectedAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::testInterfaceWillBeGarbageCollectedAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void testInterfaceWillBeGarbageCollectedAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TestObjectPython* imp = V8TestObjectPython::toNative(info.Holder());
-    V8TRYCATCH_VOID(TestInterfaceWillBeGarbageCollected*, cppValue, V8TestInterfaceWillBeGarbageCollected::hasInstance(jsValue, info.GetIsolate()) ? V8TestInterfaceWillBeGarbageCollected::toNative(v8::Handle<v8::Object>::Cast(jsValue)) : 0);
+    V8TRYCATCH_VOID(TestInterfaceWillBeGarbageCollected*, cppValue, V8TestInterfaceWillBeGarbageCollected::toNativeWithTypeCheck(info.GetIsolate(), jsValue));
     imp->setTestInterfaceWillBeGarbageCollectedAttribute(WTF::getPtr(cppValue));
 }
 
 static void testInterfaceWillBeGarbageCollectedAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::testInterfaceWillBeGarbageCollectedAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
@@ skipping 487 matching lines @@
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodTestInterfaceEmptyArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwTypeError(ExceptionMessages::failedToExecute("voidMethodTestInterfaceEmptyArg", "TestObjectPython", ExceptionMessages::notEnoughArguments(1, info.Length())), info.GetIsolate());
         return;
     }
     TestObjectPython* imp = V8TestObjectPython::toNative(info.Holder());
-    V8TRYCATCH_VOID(TestInterfaceEmpty*, testInterfaceEmptyArg, V8TestInterfaceEmpty::hasInstance(info[0], info.GetIsolate()) ? V8TestInterfaceEmpty::toNative(v8::Handle<v8::Object>::Cast(info[0])) : 0);
+    V8TRYCATCH_VOID(TestInterfaceEmpty*, testInterfaceEmptyArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
     imp->voidMethodTestInterfaceEmptyArg(testInterfaceEmptyArg);
 }
 
 static void voidMethodTestInterfaceEmptyArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectPythonV8Internal::voidMethodTestInterfaceEmptyArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodLongArgTestInterfaceEmptyArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "voidMethodLongArgTestInterfaceEmptyArg", "TestObjectPython", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 2)) {
         exceptionState.throwTypeError(ExceptionMessages::notEnoughArguments(2, info.Length()));
         exceptionState.throwIfNeeded();
         return;
     }
     TestObjectPython* imp = V8TestObjectPython::toNative(info.Holder());
     V8TRYCATCH_EXCEPTION_VOID(int, longArg, toInt32(info[0], exceptionState), exceptionState);
-    V8TRYCATCH_VOID(TestInterfaceEmpty*, testInterfaceEmptyArg, V8TestInterfaceEmpty::hasInstance(info[1], info.GetIsolate()) ? V8TestInterfaceEmpty::toNative(v8::Handle<v8::Object>::Cast(info[1])) : 0);
+    V8TRYCATCH_VOID(TestInterfaceEmpty*, testInterfaceEmptyArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[1]));
     imp->voidMethodLongArgTestInterfaceEmptyArg(longArg, testInterfaceEmptyArg);
 }
 
 static void voidMethodLongArgTestInterfaceEmptyArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectPythonV8Internal::voidMethodLongArgTestInterfaceEmptyArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
@@ skipping 157 matching lines @@
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodAttrArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwTypeError(ExceptionMessages::failedToExecute("voidMethodAttrArg", "TestObjectPython", ExceptionMessages::notEnoughArguments(1, info.Length())), info.GetIsolate());
         return;
     }
     TestObjectPython* imp = V8TestObjectPython::toNative(info.Holder());
-    V8TRYCATCH_VOID(Attr*, attrArg, V8Attr::hasInstance(info[0], info.GetIsolate()) ? V8Attr::toNative(v8::Handle<v8::Object>::Cast(info[0])) : 0);
+    V8TRYCATCH_VOID(Attr*, attrArg, V8Attr::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
     imp->voidMethodAttrArg(attrArg);
 }
 
 static void voidMethodAttrArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectPythonV8Internal::voidMethodAttrArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodDocumentArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwTypeError(ExceptionMessages::failedToExecute("voidMethodDocumentArg", "TestObjectPython", ExceptionMessages::notEnoughArguments(1, info.Length())), info.GetIsolate());
         return;
     }
     TestObjectPython* imp = V8TestObjectPython::toNative(info.Holder());
-    V8TRYCATCH_VOID(Document*, documentArg, V8Document::hasInstance(info[0], info.GetIsolate()) ? V8Document::toNative(v8::Handle<v8::Object>::Cast(info[0])) : 0);
+    V8TRYCATCH_VOID(Document*, documentArg, V8Document::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
     imp->voidMethodDocumentArg(documentArg);
 }
 
 static void voidMethodDocumentArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectPythonV8Internal::voidMethodDocumentArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodDocumentTypeArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwTypeError(ExceptionMessages::failedToExecute("voidMethodDocumentTypeArg", "TestObjectPython", ExceptionMessages::notEnoughArguments(1, info.Length())), info.GetIsolate());
         return;
     }
     TestObjectPython* imp = V8TestObjectPython::toNative(info.Holder());
-    V8TRYCATCH_VOID(DocumentType*, documentTypeArg, V8DocumentType::hasInstance(info[0], info.GetIsolate()) ? V8DocumentType::toNative(v8::Handle<v8::Object>::Cast(info[0])) : 0);
+    V8TRYCATCH_VOID(DocumentType*, documentTypeArg, V8DocumentType::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
     imp->voidMethodDocumentTypeArg(documentTypeArg);
 }
 
 static void voidMethodDocumentTypeArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectPythonV8Internal::voidMethodDocumentTypeArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodElementArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwTypeError(ExceptionMessages::failedToExecute("voidMethodElementArg", "TestObjectPython", ExceptionMessages::notEnoughArguments(1, info.Length())), info.GetIsolate());
         return;
     }
     TestObjectPython* imp = V8TestObjectPython::toNative(info.Holder());
-    V8TRYCATCH_VOID(Element*, elementArg, V8Element::hasInstance(info[0], info.GetIsolate()) ? V8Element::toNative(v8::Handle<v8::Object>::Cast(info[0])) : 0);
+    V8TRYCATCH_VOID(Element*, elementArg, V8Element::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
     imp->voidMethodElementArg(elementArg);
 }
 
 static void voidMethodElementArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectPythonV8Internal::voidMethodElementArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodNodeArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwTypeError(ExceptionMessages::failedToExecute("voidMethodNodeArg", "TestObjectPython", ExceptionMessages::notEnoughArguments(1, info.Length())), info.GetIsolate());
         return;
     }
     TestObjectPython* imp = V8TestObjectPython::toNative(info.Holder());
-    V8TRYCATCH_VOID(Node*, nodeArg, V8Node::hasInstance(info[0], info.GetIsolate()) ? V8Node::toNative(v8::Handle<v8::Object>::Cast(info[0])) : 0);
+    V8TRYCATCH_VOID(Node*, nodeArg, V8Node::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
     imp->voidMethodNodeArg(nodeArg);
 }
 
 static void voidMethodNodeArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectPythonV8Internal::voidMethodNodeArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
@@ skipping 338 matching lines @@
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodNullableStringArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwTypeError(ExceptionMessages::failedToExecute("voidMethodNullableStringArg", "TestObjectPython", ExceptionMessages::notEnoughArguments(1, info.Length())), info.GetIsolate());
         return;
     }
     TestObjectPython* imp = V8TestObjectPython::toNative(info.Holder());
-    V8TRYCATCH_VOID(TestInterfaceEmpty*, nullableTestInterfaceEmptyArg, V8TestInterfaceEmpty::hasInstance(info[0], info.GetIsolate()) ? V8TestInterfaceEmpty::toNative(v8::Handle<v8::Object>::Cast(info[0])) : 0);
+    V8TRYCATCH_VOID(TestInterfaceEmpty*, nullableTestInterfaceEmptyArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
     imp->voidMethodNullableStringArg(nullableTestInterfaceEmptyArg);
 }
 
 static void voidMethodNullableStringArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectPythonV8Internal::voidMethodNullableStringArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
@@ skipping 322 matching lines @@
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodOptionalTestInterfaceEmptyArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TestObjectPython* imp = V8TestObjectPython::toNative(info.Holder());
     if (UNLIKELY(info.Length() <= 0)) {
         imp->voidMethodOptionalTestInterfaceEmptyArg();
         return;
     }
-    V8TRYCATCH_VOID(TestInterfaceEmpty*, optionalTestInterfaceEmptyArg, V8TestInterfaceEmpty::hasInstance(info[0], info.GetIsolate()) ? V8TestInterfaceEmpty::toNative(v8::Handle<v8::Object>::Cast(info[0])) : 0);
+    V8TRYCATCH_VOID(TestInterfaceEmpty*, optionalTestInterfaceEmptyArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
     imp->voidMethodOptionalTestInterfaceEmptyArg(optionalTestInterfaceEmptyArg);
 }
 
 static void voidMethodOptionalTestInterfaceEmptyArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectPythonV8Internal::voidMethodOptionalTestInterfaceEmptyArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
@@ skipping 135 matching lines @@
         exceptionState.throwTypeError(ExceptionMessages::notEnoughArguments(1, info.Length()));
         exceptionState.throwIfNeeded();
         return;
     }
     TestObjectPython* imp = V8TestObjectPython::toNative(info.Holder());
     V8TRYCATCH_EXCEPTION_VOID(int, longArg, toInt32(info[0], exceptionState), exceptionState);
     if (UNLIKELY(info.Length() <= 1)) {
         imp->voidMethodLongArgOptionalTestInterfaceEmptyArg(longArg);
         return;
     }
-    V8TRYCATCH_VOID(TestInterfaceEmpty*, optionalTestInterfaceEmpty, V8TestInterfaceEmpty::hasInstance(info[1], info.GetIsolate()) ? V8TestInterfaceEmpty::toNative(v8::Handle<v8::Object>::Cast(info[1])) : 0);
+    V8TRYCATCH_VOID(TestInterfaceEmpty*, optionalTestInterfaceEmpty, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[1]));
     imp->voidMethodLongArgOptionalTestInterfaceEmptyArg(longArg, optionalTestInterfaceEmpty);
 }
 
 static void voidMethodLongArgOptionalTestInterfaceEmptyArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectPythonV8Internal::voidMethodLongArgOptionalTestInterfaceEmptyArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodTestInterfaceEmptyArgOptionalLongArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "voidMethodTestInterfaceEmptyArgOptionalLongArg", "TestObjectPython", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         exceptionState.throwTypeError(ExceptionMessages::notEnoughArguments(1, info.Length()));
         exceptionState.throwIfNeeded();
         return;
     }
     TestObjectPython* imp = V8TestObjectPython::toNative(info.Holder());
-    V8TRYCATCH_VOID(TestInterfaceEmpty*, optionalTestInterfaceEmpty, V8TestInterfaceEmpty::hasInstance(info[0], info.GetIsolate()) ? V8TestInterfaceEmpty::toNative(v8::Handle<v8::Object>::Cast(info[0])) : 0);
+    V8TRYCATCH_VOID(TestInterfaceEmpty*, optionalTestInterfaceEmpty, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
     if (UNLIKELY(info.Length() <= 1)) {
         imp->voidMethodTestInterfaceEmptyArgOptionalLongArg(optionalTestInterfaceEmpty);
         return;
     }
     V8TRYCATCH_EXCEPTION_VOID(int, longArg, toInt32(info[1], exceptionState), exceptionState);
     imp->voidMethodTestInterfaceEmptyArgOptionalLongArg(optionalTestInterfaceEmpty, longArg);
 }
 
 static void voidMethodTestInterfaceEmptyArgOptionalLongArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
@@ skipping 74 matching lines @@
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodTestInterfaceEmptyArgVariadicTestInterfaceEmptyArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwTypeError(ExceptionMessages::failedToExecute("voidMethodTestInterfaceEmptyArgVariadicTestInterfaceEmptyArg", "TestObjectPython", ExceptionMessages::notEnoughArguments(1, info.Length())), info.GetIsolate());
         return;
     }
     TestObjectPython* imp = V8TestObjectPython::toNative(info.Holder());
-    V8TRYCATCH_VOID(TestInterfaceEmpty*, testInterfaceEmptyArg, V8TestInterfaceEmpty::hasInstance(info[0], info.GetIsolate()) ? V8TestInterfaceEmpty::toNative(v8::Handle<v8::Object>::Cast(info[0])) : 0);
+    V8TRYCATCH_VOID(TestInterfaceEmpty*, testInterfaceEmptyArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
     Vector<RefPtr<TestInterfaceEmpty> > variadicTestInterfaceEmptyArgs;
     for (int i = 1; i < info.Length(); ++i) {
         if (!V8TestInterfaceEmpty::hasInstance(info[i], info.GetIsolate())) {
             throwTypeError(ExceptionMessages::failedToExecute("voidMethodTestInterfaceEmptyArgVariadicTestInterfaceEmptyArg", "TestObjectPython", "parameter 2 is not of type 'TestInterfaceEmpty'."), info.GetIsolate());
             return;
         }
         variadicTestInterfaceEmptyArgs.append(V8TestInterfaceEmpty::toNative(v8::Handle<v8::Object>::Cast(info[i])));
     }
     imp->voidMethodTestInterfaceEmptyArgVariadicTestInterfaceEmptyArg(testInterfaceEmptyArg, variadicTestInterfaceEmptyArgs);
 }
@@ skipping 184 matching lines @@
     imp->overloadedMethodD(longArg);
 }
 
 static void overloadedMethodD2Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwTypeError(ExceptionMessages::failedToExecute("overloadedMethodD", "TestObjectPython", ExceptionMessages::notEnoughArguments(1, info.Length())), info.GetIsolate());
         return;
     }
     TestObjectPython* imp = V8TestObjectPython::toNative(info.Holder());
-    V8TRYCATCH_VOID(TestInterfaceEmpty*, testInterfaceEmptyArg, V8TestInterfaceEmpty::hasInstance(info[0], info.GetIsolate()) ? V8TestInterfaceEmpty::toNative(v8::Handle<v8::Object>::Cast(info[0])) : 0);
+    V8TRYCATCH_VOID(TestInterfaceEmpty*, testInterfaceEmptyArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
     imp->overloadedMethodD(testInterfaceEmptyArg);
 }
 
 static void overloadedMethodDMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (((info.Length() == 1))) {
         overloadedMethodD1Method(info);
         return;
     }
     if (((info.Length() == 1) && (V8TestInterfaceEmpty::hasInstance(info[0], info.GetIsolate())))) {
@@ skipping 81 matching lines @@
     imp->overloadedMethodF(longArg);
 }
 
 static void overloadedMethodF2Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwTypeError(ExceptionMessages::failedToExecute("overloadedMethodF", "TestObjectPython", ExceptionMessages::notEnoughArguments(1, info.Length())), info.GetIsolate());
         return;
     }
     TestObjectPython* imp = V8TestObjectPython::toNative(info.Holder());
-    V8TRYCATCH_VOID(TestInterfaceEmpty*, testInterfaceEmptyNullableArg, V8TestInterfaceEmpty::hasInstance(info[0], info.GetIsolate()) ? V8TestInterfaceEmpty::toNative(v8::Handle<v8::Object>::Cast(info[0])) : 0);
+    V8TRYCATCH_VOID(TestInterfaceEmpty*, testInterfaceEmptyNullableArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
     imp->overloadedMethodF(testInterfaceEmptyNullableArg);
 }
 
 static void overloadedMethodFMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (((info.Length() == 1))) {
         overloadedMethodF1Method(info);
         return;
     }
     if (((info.Length() == 1) && (info[0]->IsNull() || V8TestInterfaceEmpty::hasInstance(info[0], info.GetIsolate())))) {
@@ skipping 292 matching lines @@
         }
         if (!window->document())
             return;
     }
     if (UNLIKELY(info.Length() < 1)) {
         exceptionState.throwTypeError(ExceptionMessages::notEnoughArguments(1, info.Length()));
         exceptionState.throwIfNeeded();
         return;
     }
     TestObjectPython* imp = V8TestObjectPython::toNative(info.Holder());
-    V8TRYCATCH_VOID(Event*, event, V8Event::hasInstance(info[0], info.GetIsolate()) ? V8Event::toNative(v8::Handle<v8::Object>::Cast(info[0])) : 0);
+    V8TRYCATCH_VOID(Event*, event, V8Event::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
     bool result = imp->dispatchEvent(event, exceptionState);
     if (exceptionState.throwIfNeeded())
         return;
     v8SetReturnValueBool(info, result);
 }
 
 static void dispatchEventMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectPythonV8Internal::dispatchEventMethod(info);
@@ skipping 42 matching lines @@
 static void voidMethodClampUnsignedLongArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectPythonV8Internal::voidMethodClampUnsignedLongArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidMethodDefaultUndefinedTestInterfaceEmptyArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TestObjectPython* imp = V8TestObjectPython::toNative(info.Holder());
-    V8TRYCATCH_VOID(TestInterfaceEmpty*, defaultUndefinedTestInterfaceEmptyArg, V8TestInterfaceEmpty::hasInstance(info[0], info.GetIsolate()) ? V8TestInterfaceEmpty::toNative(v8::Handle<v8::Object>::Cast(info[0])) : 0);
+    V8TRYCATCH_VOID(TestInterfaceEmpty*, defaultUndefinedTestInterfaceEmptyArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
     imp->voidMethodDefaultUndefinedTestInterfaceEmptyArg(defaultUndefinedTestInterfaceEmptyArg);
 }
 
 static void voidMethodDefaultUndefinedTestInterfaceEmptyArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectPythonV8Internal::voidMethodDefaultUndefinedTestInterfaceEmptyArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
@@ skipping 493 matching lines @@
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void perWorldBindingsVoidMethodTestInterfaceEmptyArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwTypeError(ExceptionMessages::failedToExecute("perWorldBindingsVoidMethodTestInterfaceEmptyArg", "TestObjectPython", ExceptionMessages::notEnoughArguments(1, info.Length())), info.GetIsolate());
         return;
     }
     TestObjectPython* imp = V8TestObjectPython::toNative(info.Holder());
-    V8TRYCATCH_VOID(TestInterfaceEmpty*, testInterfaceEmptyArg, V8TestInterfaceEmpty::hasInstance(info[0], info.GetIsolate()) ? V8TestInterfaceEmpty::toNative(v8::Handle<v8::Object>::Cast(info[0])) : 0);
+    V8TRYCATCH_VOID(TestInterfaceEmpty*, testInterfaceEmptyArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
     imp->perWorldBindingsVoidMethodTestInterfaceEmptyArg(testInterfaceEmptyArg);
 }
 
 static void perWorldBindingsVoidMethodTestInterfaceEmptyArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectPythonV8Internal::perWorldBindingsVoidMethodTestInterfaceEmptyArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void perWorldBindingsVoidMethodTestInterfaceEmptyArgMethodForMainWorld(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwTypeError(ExceptionMessages::failedToExecute("perWorldBindingsVoidMethodTestInterfaceEmptyArg", "TestObjectPython", ExceptionMessages::notEnoughArguments(1, info.Length())), info.GetIsolate());
         return;
     }
     TestObjectPython* imp = V8TestObjectPython::toNative(info.Holder());
-    V8TRYCATCH_VOID(TestInterfaceEmpty*, testInterfaceEmptyArg, V8TestInterfaceEmpty::hasInstance(info[0], info.GetIsolate()) ? V8TestInterfaceEmpty::toNative(v8::Handle<v8::Object>::Cast(info[0])) : 0);
+    V8TRYCATCH_VOID(TestInterfaceEmpty*, testInterfaceEmptyArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
     imp->perWorldBindingsVoidMethodTestInterfaceEmptyArg(testInterfaceEmptyArg);
 }
 
 static void perWorldBindingsVoidMethodTestInterfaceEmptyArgMethodCallbackForMainWorld(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectPythonV8Internal::perWorldBindingsVoidMethodTestInterfaceEmptyArgMethodForMainWorld(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
@@ skipping 258 matching lines @@
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwTypeError(ExceptionMessages::failedToExecute("strictTypeCheckingVoidMethodTestInterfaceEmptyArg", "TestObjectPython", ExceptionMessages::notEnoughArguments(1, info.Length())), info.GetIsolate());
         return;
     }
     TestObjectPython* imp = V8TestObjectPython::toNative(info.Holder());
     if (info.Length() > 0 && !V8TestInterfaceEmpty::hasInstance(info[0], info.GetIsolate())) {
         throwTypeError(ExceptionMessages::failedToExecute("strictTypeCheckingVoidMethodTestInterfaceEmptyArg", "TestObjectPython", "parameter 1 is not of type 'TestInterfaceEmpty'."), info.GetIsolate());
         return;
     }
-    V8TRYCATCH_VOID(TestInterfaceEmpty*, testInterfaceEmptyArg, V8TestInterfaceEmpty::hasInstance(info[0], info.GetIsolate()) ? V8TestInterfaceEmpty::toNative(v8::Handle<v8::Object>::Cast(info[0])) : 0);
+    V8TRYCATCH_VOID(TestInterfaceEmpty*, testInterfaceEmptyArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
     imp->strictTypeCheckingVoidMethodTestInterfaceEmptyArg(testInterfaceEmptyArg);
 }
 
 static void strictTypeCheckingVoidMethodTestInterfaceEmptyArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectPythonV8Internal::strictTypeCheckingVoidMethodTestInterfaceEmptyArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void strictTypeCheckingVoidMethodNullableTestInterfaceEmptyArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwTypeError(ExceptionMessages::failedToExecute("strictTypeCheckingVoidMethodNullableTestInterfaceEmptyArg", "TestObjectPython", ExceptionMessages::notEnoughArguments(1, info.Length())), info.GetIsolate());
         return;
     }
     TestObjectPython* imp = V8TestObjectPython::toNative(info.Holder());
     if (info.Length() > 0 && !isUndefinedOrNull(info[0]) && !V8TestInterfaceEmpty::hasInstance(info[0], info.GetIsolate())) {
         throwTypeError(ExceptionMessages::failedToExecute("strictTypeCheckingVoidMethodNullableTestInterfaceEmptyArg", "TestObjectPython", "parameter 1 is not of type 'TestInterfaceEmpty'."), info.GetIsolate());
         return;
     }
-    V8TRYCATCH_VOID(TestInterfaceEmpty*, testInterfaceEmptyArg, V8TestInterfaceEmpty::hasInstance(info[0], info.GetIsolate()) ? V8TestInterfaceEmpty::toNative(v8::Handle<v8::Object>::Cast(info[0])) : 0);
+    V8TRYCATCH_VOID(TestInterfaceEmpty*, testInterfaceEmptyArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
     imp->strictTypeCheckingVoidMethodNullableTestInterfaceEmptyArg(testInterfaceEmptyArg);
 }
 
 static void strictTypeCheckingVoidMethodNullableTestInterfaceEmptyArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjectPythonV8Internal::strictTypeCheckingVoidMethodNullableTestInterfaceEmptyArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
@@ skipping 448 matching lines @@
     data->templateMap(currentWorldType).add(&wrapperTypeInfo, UnsafePersistent<v8::FunctionTemplate>(isolate, templ));
     return handleScope.Escape(templ);
 }
 
 bool V8TestObjectPython::hasInstance(v8::Handle<v8::Value> jsValue, v8::Isolate* isolate)
 {
     return V8PerIsolateData::from(isolate)->hasInstanceInMainWorld(&wrapperTypeInfo, jsValue)
         || V8PerIsolateData::from(isolate)->hasInstanceInNonMainWorld(&wrapperTypeInfo, jsValue);
 }
 
+TestObjectPython* V8TestObjectPython::toNativeWithTypeCheck(v8::Isolate* isolate, v8::Handle<v8::Value> value)
+{
+    return hasInstance(value, isolate) ? fromInternalPointer(v8::Handle<v8::Object>::Cast(value)->GetAlignedPointerFromInternalField(v8DOMWrapperObjectIndex)) : 0;
+}
+
 void V8TestObjectPython::installPerContextEnabledProperties(v8::Handle<v8::Object> instanceTemplate, TestObjectPython* impl, v8::Isolate* isolate)
 {
     v8::Local<v8::Object> prototypeTemplate = v8::Local<v8::Object>::Cast(instanceTemplate->GetPrototype());
     if (ContextFeatures::featureNameEnabled(impl->document())) {
         static const V8DOMConfiguration::AttributeConfiguration attributeConfiguration =\
         {"perContextEnabledLongAttribute", TestObjectPythonV8Internal::perContextEnabledLongAttributeAttributeGetterCallback, TestObjectPythonV8Internal::perContextEnabledLongAttributeAttributeSetterCallback, 0, 0, 0, static_cast<v8::AccessControl>(v8::DEFAULT), static_cast<v8::PropertyAttribute>(v8::None), 0 /* on instance */};
         V8DOMConfiguration::installAttribute(instanceTemplate, prototypeTemplate, attributeConfiguration, isolate);
     }
     if (ContextFeatures::featureNameEnabled(impl->document())) {
         static const V8DOMConfiguration::AttributeConfiguration attributeConfiguration =\
@@ skipping 36 matching lines @@
     fromInternalPointer(object)->deref();
 }
 
 template<>
 v8::Handle<v8::Value> toV8NoInline(TestObjectPython* impl, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
 {
     return toV8(impl, creationContext, isolate);
 }
 
 } // namespace WebCore