Canvas2D Performance: fix the bottleneck of hasInstance during JS binding -- overloading

Source/bindings/tests/results/core/V8TestObject.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This file has been auto-generated by code_generator_v8.py. DO NOT MODIFY!
 
 #include "config.h"
 #include "V8TestObject.h"
 
 #include "bindings/core/v8/BindingSecurity.h"
@@ skipping 711 matching lines @@
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestObjectV8Internal::testInterfaceEmptyAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void testInterfaceEmptyAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
-    TestInterfaceEmpty* cppValue = V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), v8Value);
+    TestInterfaceEmpty* cppValue = V8TestInterfaceEmpty::toImpl(v8::Handle<v8::Object>::Cast(v8Value));
     impl->setTestInterfaceEmptyAttribute(WTF::getPtr(cppValue));
 }
 
 static void testInterfaceEmptyAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestObjectV8Internal::testInterfaceEmptyAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void testObjectAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
     v8SetReturnValueFast(info, WTF::getPtr(impl->testObjectAttribute()), impl);
 }
 
 static void testObjectAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestObjectV8Internal::testObjectAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void testObjectAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
-    TestObject* cppValue = V8TestObject::toImplWithTypeCheck(info.GetIsolate(), v8Value);
+    TestObject* cppValue = V8TestObject::toImpl(v8::Handle<v8::Object>::Cast(v8Value));
     impl->setTestObjectAttribute(WTF::getPtr(cppValue));
 }
 
 static void testObjectAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestObjectV8Internal::testObjectAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
@@ skipping 332 matching lines @@
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestObjectV8Internal::documentAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void documentAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
-    Document* cppValue = V8Document::toImplWithTypeCheck(info.GetIsolate(), v8Value);
+    Document* cppValue = V8Document::toImpl(v8::Handle<v8::Object>::Cast(v8Value));
     impl->setDocumentAttribute(WTF::getPtr(cppValue));
 }
 
 static void documentAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestObjectV8Internal::documentAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void documentFragmentAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
     v8SetReturnValueFast(info, WTF::getPtr(impl->documentFragmentAttribute()), impl);
 }
 
 static void documentFragmentAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestObjectV8Internal::documentFragmentAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void documentFragmentAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
-    DocumentFragment* cppValue = V8DocumentFragment::toImplWithTypeCheck(info.GetIsolate(), v8Value);
+    DocumentFragment* cppValue = V8DocumentFragment::toImpl(v8::Handle<v8::Object>::Cast(v8Value));
     impl->setDocumentFragmentAttribute(WTF::getPtr(cppValue));
 }
 
 static void documentFragmentAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestObjectV8Internal::documentFragmentAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void documentTypeAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
     v8SetReturnValueFast(info, WTF::getPtr(impl->documentTypeAttribute()), impl);
 }
 
 static void documentTypeAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestObjectV8Internal::documentTypeAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void documentTypeAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
-    DocumentType* cppValue = V8DocumentType::toImplWithTypeCheck(info.GetIsolate(), v8Value);
+    DocumentType* cppValue = V8DocumentType::toImpl(v8::Handle<v8::Object>::Cast(v8Value));
     impl->setDocumentTypeAttribute(WTF::getPtr(cppValue));
 }
 
 static void documentTypeAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestObjectV8Internal::documentTypeAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void elementAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
     v8SetReturnValueFast(info, WTF::getPtr(impl->elementAttribute()), impl);
 }
 
 static void elementAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestObjectV8Internal::elementAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void elementAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
-    Element* cppValue = V8Element::toImplWithTypeCheck(info.GetIsolate(), v8Value);
+    Element* cppValue = V8Element::toImpl(v8::Handle<v8::Object>::Cast(v8Value));
     impl->setElementAttribute(WTF::getPtr(cppValue));
 }
 
 static void elementAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestObjectV8Internal::elementAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void nodeAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
     v8SetReturnValueFast(info, WTF::getPtr(impl->nodeAttribute()), impl);
 }
 
 static void nodeAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestObjectV8Internal::nodeAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void nodeAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
-    Node* cppValue = V8Node::toImplWithTypeCheck(info.GetIsolate(), v8Value);
+    Node* cppValue = V8Node::toImpl(v8::Handle<v8::Object>::Cast(v8Value));
     impl->setNodeAttribute(WTF::getPtr(cppValue));
 }
 
 static void nodeAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestObjectV8Internal::nodeAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void shadowRootAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
     v8SetReturnValueFast(info, WTF::getPtr(impl->shadowRootAttribute()), impl);
 }
 
 static void shadowRootAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestObjectV8Internal::shadowRootAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void shadowRootAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
-    ShadowRoot* cppValue = V8ShadowRoot::toImplWithTypeCheck(info.GetIsolate(), v8Value);
+    ShadowRoot* cppValue = V8ShadowRoot::toImpl(v8::Handle<v8::Object>::Cast(v8Value));
     impl->setShadowRootAttribute(WTF::getPtr(cppValue));
 }
 
 static void shadowRootAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestObjectV8Internal::shadowRootAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
@@ skipping 334 matching lines @@
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestObjectV8Internal::testInterfaceOrNullAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void testInterfaceOrNullAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
-    TestInterfaceImplementation* cppValue = V8TestInterface::toImplWithTypeCheck(info.GetIsolate(), v8Value);
+    TestInterfaceImplementation* cppValue = V8TestInterface::toImpl(v8::Handle<v8::Object>::Cast(v8Value));
     impl->setTestInterfaceOrNullAttribute(WTF::getPtr(cppValue));
 }
 
 static void testInterfaceOrNullAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestObjectV8Internal::testInterfaceOrNullAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
@@ skipping 1430 matching lines @@
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void locationGarbageCollectedAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* proxyImpl = V8TestObject::toImpl(holder);
     RawPtr<TestInterfaceGarbageCollected> impl = WTF::getPtr(proxyImpl->locationGarbageCollected());
     if (!impl)
         return;
-    TestInterfaceGarbageCollected* cppValue = V8TestInterfaceGarbageCollected::toImplWithTypeCheck(info.GetIsolate(), v8Value);
+    TestInterfaceGarbageCollected* cppValue = V8TestInterfaceGarbageCollected::toImpl(v8::Handle<v8::Object>::Cast(v8Value));
     impl->setAttr1(WTF::getPtr(cppValue));
 }
 
 static void locationGarbageCollectedAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestObjectV8Internal::locationGarbageCollectedAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
@@ skipping 18 matching lines @@
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void locationWillBeGarbageCollectedAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* proxyImpl = V8TestObject::toImpl(holder);
     RefPtrWillBeRawPtr<TestInterfaceWillBeGarbageCollected> impl = WTF::getPtr(proxyImpl->locationWillBeGarbageCollected());
     if (!impl)
         return;
-    TestInterfaceWillBeGarbageCollected* cppValue = V8TestInterfaceWillBeGarbageCollected::toImplWithTypeCheck(info.GetIsolate(), v8Value);
+    TestInterfaceWillBeGarbageCollected* cppValue = V8TestInterfaceWillBeGarbageCollected::toImpl(v8::Handle<v8::Object>::Cast(v8Value));
     impl->setAttr1(WTF::getPtr(cppValue));
 }
 
 static void locationWillBeGarbageCollectedAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestObjectV8Internal::locationWillBeGarbageCollectedAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
@@ skipping 113 matching lines @@
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestObjectV8Internal::raisesExceptionTestInterfaceEmptyAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void raisesExceptionTestInterfaceEmptyAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     ExceptionState exceptionState(ExceptionState::SetterContext, "raisesExceptionTestInterfaceEmptyAttribute", "TestObject", holder, info.GetIsolate());
     TestObject* impl = V8TestObject::toImpl(holder);
-    TestInterfaceEmpty* cppValue = V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), v8Value);
+    TestInterfaceEmpty* cppValue = V8TestInterfaceEmpty::toImpl(v8::Handle<v8::Object>::Cast(v8Value));
     impl->setRaisesExceptionTestInterfaceEmptyAttribute(WTF::getPtr(cppValue), exceptionState);
     exceptionState.throwIfNeeded();
 }
 
 static void raisesExceptionTestInterfaceEmptyAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestObjectV8Internal::raisesExceptionTestInterfaceEmptyAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
@@ skipping 54 matching lines @@
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestObjectV8Internal::reflectTestInterfaceAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void reflectTestInterfaceAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
-    TestInterfaceImplementation* cppValue = V8TestInterface::toImplWithTypeCheck(info.GetIsolate(), v8Value);
+    TestInterfaceImplementation* cppValue = V8TestInterface::toImpl(v8::Handle<v8::Object>::Cast(v8Value));
     CustomElementProcessingStack::CallbackDeliveryScope deliveryScope;
     impl->setAttribute(HTMLNames::reflecttestinterfaceattributeAttr, WTF::getPtr(cppValue));
 }
 
 static void reflectTestInterfaceAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     CustomElementProcessingStack::CallbackDeliveryScope deliveryScope;
     TestObjectV8Internal::reflectTestInterfaceAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
@@ skipping 10 matching lines @@
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestObjectV8Internal::reflectReflectedNameAttributeTestAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void reflectReflectedNameAttributeTestAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
-    TestInterfaceImplementation* cppValue = V8TestInterface::toImplWithTypeCheck(info.GetIsolate(), v8Value);
+    TestInterfaceImplementation* cppValue = V8TestInterface::toImpl(v8::Handle<v8::Object>::Cast(v8Value));
     CustomElementProcessingStack::CallbackDeliveryScope deliveryScope;
     impl->setAttribute(HTMLNames::reflectedNameAttributeAttr, WTF::getPtr(cppValue));
 }
 
 static void reflectReflectedNameAttributeTestAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     CustomElementProcessingStack::CallbackDeliveryScope deliveryScope;
     TestObjectV8Internal::reflectReflectedNameAttributeTestAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
@@ skipping 1101 matching lines @@
 static void typeCheckingInterfaceTestInterfaceAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     ExceptionState exceptionState(ExceptionState::SetterContext, "typeCheckingInterfaceTestInterfaceAttribute", "TestObject", holder, info.GetIsolate());
     if (!V8TestInterface::hasInstance(v8Value, info.GetIsolate())) {
         exceptionState.throwTypeError("The provided value is not of type 'TestInterface'.");
         exceptionState.throwIfNeeded();
         return;
     }
     TestObject* impl = V8TestObject::toImpl(holder);
-    TestInterfaceImplementation* cppValue = V8TestInterface::toImplWithTypeCheck(info.GetIsolate(), v8Value);
+    TestInterfaceImplementation* cppValue = V8TestInterface::toImpl(v8::Handle<v8::Object>::Cast(v8Value));
     impl->setTypeCheckingInterfaceTestInterfaceAttribute(WTF::getPtr(cppValue));
 }
 
 static void typeCheckingInterfaceTestInterfaceAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestObjectV8Internal::typeCheckingInterfaceTestInterfaceAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
@@ skipping 14 matching lines @@
 static void typeCheckingInterfaceTestInterfaceOrNullAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     ExceptionState exceptionState(ExceptionState::SetterContext, "typeCheckingInterfaceTestInterfaceOrNullAttribute", "TestObject", holder, info.GetIsolate());
     if (!isUndefinedOrNull(v8Value) && !V8TestInterface::hasInstance(v8Value, info.GetIsolate())) {
         exceptionState.throwTypeError("The provided value is not of type 'TestInterface'.");
         exceptionState.throwIfNeeded();
         return;
     }
     TestObject* impl = V8TestObject::toImpl(holder);
-    TestInterfaceImplementation* cppValue = V8TestInterface::toImplWithTypeCheck(info.GetIsolate(), v8Value);
+    TestInterfaceImplementation* cppValue = V8TestInterface::toImpl(v8::Handle<v8::Object>::Cast(v8Value));
     impl->setTypeCheckingInterfaceTestInterfaceOrNullAttribute(WTF::getPtr(cppValue));
 }
 
 static void typeCheckingInterfaceTestInterfaceOrNullAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestObjectV8Internal::typeCheckingInterfaceTestInterfaceOrNullAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
@@ skipping 100 matching lines @@
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestObjectV8Internal::testInterfaceAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void testInterfaceAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
-    TestInterfaceImplementation* cppValue = V8TestInterface::toImplWithTypeCheck(info.GetIsolate(), v8Value);
+    TestInterfaceImplementation* cppValue = V8TestInterface::toImpl(v8::Handle<v8::Object>::Cast(v8Value));
     impl->setTestInterfaceAttribute(WTF::getPtr(cppValue));
 }
 
 static void testInterfaceAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestObjectV8Internal::testInterfaceAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void testInterfaceGarbageCollectedAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
     v8SetReturnValueFast(info, WTF::getPtr(impl->testInterfaceGarbageCollectedAttribute()), impl);
 }
 
 static void testInterfaceGarbageCollectedAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestObjectV8Internal::testInterfaceGarbageCollectedAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void testInterfaceGarbageCollectedAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
-    TestInterfaceGarbageCollected* cppValue = V8TestInterfaceGarbageCollected::toImplWithTypeCheck(info.GetIsolate(), v8Value);
+    TestInterfaceGarbageCollected* cppValue = V8TestInterfaceGarbageCollected::toImpl(v8::Handle<v8::Object>::Cast(v8Value));
     impl->setTestInterfaceGarbageCollectedAttribute(WTF::getPtr(cppValue));
 }
 
 static void testInterfaceGarbageCollectedAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestObjectV8Internal::testInterfaceGarbageCollectedAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void testInterfaceGarbageCollectedOrNullAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
     v8SetReturnValueFast(info, WTF::getPtr(impl->testInterfaceGarbageCollectedOrNullAttribute()), impl);
 }
 
 static void testInterfaceGarbageCollectedOrNullAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestObjectV8Internal::testInterfaceGarbageCollectedOrNullAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void testInterfaceGarbageCollectedOrNullAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
-    TestInterfaceGarbageCollected* cppValue = V8TestInterfaceGarbageCollected::toImplWithTypeCheck(info.GetIsolate(), v8Value);
+    TestInterfaceGarbageCollected* cppValue = V8TestInterfaceGarbageCollected::toImpl(v8::Handle<v8::Object>::Cast(v8Value));
     impl->setTestInterfaceGarbageCollectedOrNullAttribute(WTF::getPtr(cppValue));
 }
 
 static void testInterfaceGarbageCollectedOrNullAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestObjectV8Internal::testInterfaceGarbageCollectedOrNullAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void testInterfaceWillBeGarbageCollectedAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
     v8SetReturnValueFast(info, WTF::getPtr(impl->testInterfaceWillBeGarbageCollectedAttribute()), impl);
 }
 
 static void testInterfaceWillBeGarbageCollectedAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestObjectV8Internal::testInterfaceWillBeGarbageCollectedAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void testInterfaceWillBeGarbageCollectedAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
-    TestInterfaceWillBeGarbageCollected* cppValue = V8TestInterfaceWillBeGarbageCollected::toImplWithTypeCheck(info.GetIsolate(), v8Value);
+    TestInterfaceWillBeGarbageCollected* cppValue = V8TestInterfaceWillBeGarbageCollected::toImpl(v8::Handle<v8::Object>::Cast(v8Value));
     impl->setTestInterfaceWillBeGarbageCollectedAttribute(WTF::getPtr(cppValue));
 }
 
 static void testInterfaceWillBeGarbageCollectedAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestObjectV8Internal::testInterfaceWillBeGarbageCollectedAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void testInterfaceWillBeGarbageCollectedOrNullAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
     v8SetReturnValueFast(info, WTF::getPtr(impl->testInterfaceWillBeGarbageCollectedOrNullAttribute()), impl);
 }
 
 static void testInterfaceWillBeGarbageCollectedOrNullAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestObjectV8Internal::testInterfaceWillBeGarbageCollectedOrNullAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void testInterfaceWillBeGarbageCollectedOrNullAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
-    TestInterfaceWillBeGarbageCollected* cppValue = V8TestInterfaceWillBeGarbageCollected::toImplWithTypeCheck(info.GetIsolate(), v8Value);
+    TestInterfaceWillBeGarbageCollected* cppValue = V8TestInterfaceWillBeGarbageCollected::toImpl(v8::Handle<v8::Object>::Cast(v8Value));
     impl->setTestInterfaceWillBeGarbageCollectedOrNullAttribute(WTF::getPtr(cppValue));
 }
 
 static void testInterfaceWillBeGarbageCollectedOrNullAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestObjectV8Internal::testInterfaceWillBeGarbageCollectedOrNullAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
@@ skipping 93 matching lines @@
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestObjectV8Internal::nodeAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void nodeAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
-    Node* cppValue = V8Node::toImplWithTypeCheck(info.GetIsolate(), v8Value);
+    Node* cppValue = V8Node::toImpl(v8::Handle<v8::Object>::Cast(v8Value));
     V8TestObject::PrivateScript::nodeAttributeAttributeSetter(toFrameIfNotDetached(info.GetIsolate()->GetCurrentContext()), impl, cppValue);
 }
 
 static void nodeAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestObjectV8Internal::nodeAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
@@ skipping 708 matching lines @@
 
 static void voidMethodTestInterfaceEmptyArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         V8ThrowException::throwException(createMinimumArityTypeErrorForMethod("voidMethodTestInterfaceEmptyArg", "TestObject", 1, info.Length(), info.GetIsolate()), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     TestInterfaceEmpty* testInterfaceEmptyArg;
     {
-        testInterfaceEmptyArg = V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), info[0]);
+        testInterfaceEmptyArg = V8TestInterfaceEmpty::toImpl(v8::Handle<v8::Object>::Cast(info[0]));
     }
     impl->voidMethodTestInterfaceEmptyArg(testInterfaceEmptyArg);
 }
 
 static void voidMethodTestInterfaceEmptyArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
     TestObjectV8Internal::voidMethodTestInterfaceEmptyArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void voidMethodLongArgTestInterfaceEmptyArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "voidMethodLongArgTestInterfaceEmptyArg", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 2)) {
         setMinimumArityTypeError(exceptionState, 2, info.Length());
         exceptionState.throwIfNeeded();
         return;
     }
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     int longArg;
     TestInterfaceEmpty* testInterfaceEmptyArg;
     {
         TONATIVE_VOID_EXCEPTIONSTATE_INTERNAL(longArg, toInt32(info[0], exceptionState), exceptionState);
-        testInterfaceEmptyArg = V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), info[1]);
+        testInterfaceEmptyArg = V8TestInterfaceEmpty::toImpl(v8::Handle<v8::Object>::Cast(info[1]));
     }
     impl->voidMethodLongArgTestInterfaceEmptyArg(longArg, testInterfaceEmptyArg);
 }
 
 static void voidMethodLongArgTestInterfaceEmptyArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
     TestObjectV8Internal::voidMethodLongArgTestInterfaceEmptyArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
@@ skipping 123 matching lines @@
 
 static void voidMethodAttrArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         V8ThrowException::throwException(createMinimumArityTypeErrorForMethod("voidMethodAttrArg", "TestObject", 1, info.Length(), info.GetIsolate()), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     Attr* attrArg;
     {
-        attrArg = V8Attr::toImplWithTypeCheck(info.GetIsolate(), info[0]);
+        attrArg = V8Attr::toImpl(v8::Handle<v8::Object>::Cast(info[0]));
     }
     impl->voidMethodAttrArg(attrArg);
 }
 
 static void voidMethodAttrArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
     TestObjectV8Internal::voidMethodAttrArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void voidMethodDocumentArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         V8ThrowException::throwException(createMinimumArityTypeErrorForMethod("voidMethodDocumentArg", "TestObject", 1, info.Length(), info.GetIsolate()), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     Document* documentArg;
     {
-        documentArg = V8Document::toImplWithTypeCheck(info.GetIsolate(), info[0]);
+        documentArg = V8Document::toImpl(v8::Handle<v8::Object>::Cast(info[0]));
     }
     impl->voidMethodDocumentArg(documentArg);
 }
 
 static void voidMethodDocumentArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
     TestObjectV8Internal::voidMethodDocumentArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void voidMethodDocumentTypeArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         V8ThrowException::throwException(createMinimumArityTypeErrorForMethod("voidMethodDocumentTypeArg", "TestObject", 1, info.Length(), info.GetIsolate()), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     DocumentType* documentTypeArg;
     {
-        documentTypeArg = V8DocumentType::toImplWithTypeCheck(info.GetIsolate(), info[0]);
+        documentTypeArg = V8DocumentType::toImpl(v8::Handle<v8::Object>::Cast(info[0]));
     }
     impl->voidMethodDocumentTypeArg(documentTypeArg);
 }
 
 static void voidMethodDocumentTypeArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
     TestObjectV8Internal::voidMethodDocumentTypeArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void voidMethodElementArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         V8ThrowException::throwException(createMinimumArityTypeErrorForMethod("voidMethodElementArg", "TestObject", 1, info.Length(), info.GetIsolate()), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     Element* elementArg;
     {
-        elementArg = V8Element::toImplWithTypeCheck(info.GetIsolate(), info[0]);
+        elementArg = V8Element::toImpl(v8::Handle<v8::Object>::Cast(info[0]));
     }
     impl->voidMethodElementArg(elementArg);
 }
 
 static void voidMethodElementArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
     TestObjectV8Internal::voidMethodElementArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void voidMethodNodeArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         V8ThrowException::throwException(createMinimumArityTypeErrorForMethod("voidMethodNodeArg", "TestObject", 1, info.Length(), info.GetIsolate()), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     Node* nodeArg;
     {
-        nodeArg = V8Node::toImplWithTypeCheck(info.GetIsolate(), info[0]);
+        nodeArg = V8Node::toImpl(v8::Handle<v8::Object>::Cast(info[0]));
     }
     impl->voidMethodNodeArg(nodeArg);
 }
 
 static void voidMethodNodeArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
     TestObjectV8Internal::voidMethodNodeArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
@@ skipping 567 matching lines @@
 
 static void voidMethodTestInterfaceEmptyOrNullArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         V8ThrowException::throwException(createMinimumArityTypeErrorForMethod("voidMethodTestInterfaceEmptyOrNullArg", "TestObject", 1, info.Length(), info.GetIsolate()), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     TestInterfaceEmpty* nullableTestInterfaceEmptyArg;
     {
-        nullableTestInterfaceEmptyArg = V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), info[0]);
+        nullableTestInterfaceEmptyArg = V8TestInterfaceEmpty::toImpl(v8::Handle<v8::Object>::Cast(info[0]));
     }
     impl->voidMethodTestInterfaceEmptyOrNullArg(nullableTestInterfaceEmptyArg);
 }
 
 static void voidMethodTestInterfaceEmptyOrNullArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
     TestObjectV8Internal::voidMethodTestInterfaceEmptyOrNullArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
@@ skipping 465 matching lines @@
 
 static void voidMethodOptionalTestInterfaceEmptyArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     TestInterfaceEmpty* optionalTestInterfaceEmptyArg;
     {
         if (UNLIKELY(info.Length() <= 0)) {
             impl->voidMethodOptionalTestInterfaceEmptyArg();
             return;
         }
-        optionalTestInterfaceEmptyArg = V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), info[0]);
+        optionalTestInterfaceEmptyArg = V8TestInterfaceEmpty::toImpl(v8::Handle<v8::Object>::Cast(info[0]));
     }
     impl->voidMethodOptionalTestInterfaceEmptyArg(optionalTestInterfaceEmptyArg);
 }
 
 static void voidMethodOptionalTestInterfaceEmptyArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
     TestObjectV8Internal::voidMethodOptionalTestInterfaceEmptyArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
@@ skipping 160 matching lines @@
     }
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     int longArg;
     TestInterfaceEmpty* optionalTestInterfaceEmpty;
     {
         TONATIVE_VOID_EXCEPTIONSTATE_INTERNAL(longArg, toInt32(info[0], exceptionState), exceptionState);
         if (UNLIKELY(info.Length() <= 1)) {
             impl->voidMethodLongArgOptionalTestInterfaceEmptyArg(longArg);
             return;
         }
-        optionalTestInterfaceEmpty = V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), info[1]);
+        optionalTestInterfaceEmpty = V8TestInterfaceEmpty::toImpl(v8::Handle<v8::Object>::Cast(info[1]));
     }
     impl->voidMethodLongArgOptionalTestInterfaceEmptyArg(longArg, optionalTestInterfaceEmpty);
 }
 
 static void voidMethodLongArgOptionalTestInterfaceEmptyArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
     TestObjectV8Internal::voidMethodLongArgOptionalTestInterfaceEmptyArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void voidMethodTestInterfaceEmptyArgOptionalLongArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "voidMethodTestInterfaceEmptyArgOptionalLongArg", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         setMinimumArityTypeError(exceptionState, 1, info.Length());
         exceptionState.throwIfNeeded();
         return;
     }
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     TestInterfaceEmpty* optionalTestInterfaceEmpty;
     int longArg;
     {
-        optionalTestInterfaceEmpty = V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), info[0]);
+        optionalTestInterfaceEmpty = V8TestInterfaceEmpty::toImpl(v8::Handle<v8::Object>::Cast(info[0]));
         if (UNLIKELY(info.Length() <= 1)) {
             impl->voidMethodTestInterfaceEmptyArgOptionalLongArg(optionalTestInterfaceEmpty);
             return;
         }
         TONATIVE_VOID_EXCEPTIONSTATE_INTERNAL(longArg, toInt32(info[1], exceptionState), exceptionState);
     }
     impl->voidMethodTestInterfaceEmptyArgOptionalLongArg(optionalTestInterfaceEmpty, longArg);
 }
 
 static void voidMethodTestInterfaceEmptyArgOptionalLongArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
@@ skipping 207 matching lines @@
     TestObjectV8Internal::voidMethodDefaultNullableStringArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void voidMethodDefaultNullableTestInterfaceArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     TestInterfaceImplementation* defaultTestInterfaceArg;
     {
         if (!info[0]->IsUndefined()) {
-            defaultTestInterfaceArg = V8TestInterface::toImplWithTypeCheck(info.GetIsolate(), info[0]);
+            defaultTestInterfaceArg = V8TestInterface::toImpl(v8::Handle<v8::Object>::Cast(info[0]));
         } else {
             defaultTestInterfaceArg = nullptr;
         }
     }
     impl->voidMethodDefaultNullableTestInterfaceArg(defaultTestInterfaceArg);
 }
 
 static void voidMethodDefaultNullableTestInterfaceArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
@@ skipping 74 matching lines @@
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "voidMethodTestInterfaceEmptyArgVariadicTestInterfaceEmptyArg", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         setMinimumArityTypeError(exceptionState, 1, info.Length());
         exceptionState.throwIfNeeded();
         return;
     }
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     TestInterfaceEmpty* testInterfaceEmptyArg;
     Vector<RefPtr<TestInterfaceEmpty> > variadicTestInterfaceEmptyArgs;
     {
-        testInterfaceEmptyArg = V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), info[0]);
+        testInterfaceEmptyArg = V8TestInterfaceEmpty::toImpl(v8::Handle<v8::Object>::Cast(info[0]));
         for (int i = 1; i < info.Length(); ++i) {
             if (!V8TestInterfaceEmpty::hasInstance(info[i], info.GetIsolate())) {
                 exceptionState.throwTypeError("parameter 2 is not of type 'TestInterfaceEmpty'.");
                 exceptionState.throwIfNeeded();
                 return;
             }
             variadicTestInterfaceEmptyArgs.append(V8TestInterfaceEmpty::toImpl(v8::Handle<v8::Object>::Cast(info[i])));
         }
     }
     impl->voidMethodTestInterfaceEmptyArgVariadicTestInterfaceEmptyArg(testInterfaceEmptyArg, variadicTestInterfaceEmptyArgs);
@@ skipping 189 matching lines @@
         TONATIVE_VOID_EXCEPTIONSTATE_INTERNAL(longArg, toInt32(info[0], exceptionState), exceptionState);
     }
     impl->overloadedMethodC(longArg);
 }
 
 static void overloadedMethodC2Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     TestInterfaceEmpty* testInterfaceEmptyArg;
     {
-        testInterfaceEmptyArg = V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), info[0]);
+        testInterfaceEmptyArg = V8TestInterfaceEmpty::toImpl(v8::Handle<v8::Object>::Cast(info[0]));
     }
     impl->overloadedMethodC(testInterfaceEmptyArg);
 }
 
 static void overloadedMethodCMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "overloadedMethodC", "TestObject", info.Holder(), info.GetIsolate());
     switch (std::min(1, info.Length())) {
     case 1:
         if (V8TestInterfaceEmpty::hasInstance(info[0], info.GetIsolate())) {
@@ skipping 82 matching lines @@
         TONATIVE_VOID_EXCEPTIONSTATE_INTERNAL(longArg, toInt32(info[0], exceptionState), exceptionState);
     }
     impl->overloadedMethodE(longArg);
 }
 
 static void overloadedMethodE2Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     TestInterfaceEmpty* testInterfaceEmptyOrNullArg;
     {
-        testInterfaceEmptyOrNullArg = V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), info[0]);
+        testInterfaceEmptyOrNullArg = V8TestInterfaceEmpty::toImpl(v8::Handle<v8::Object>::Cast(info[0]));
     }
     impl->overloadedMethodE(testInterfaceEmptyOrNullArg);
 }
 
 static void overloadedMethodEMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "overloadedMethodE", "TestObject", info.Holder(), info.GetIsolate());
     switch (std::min(1, info.Length())) {
     case 1:
         if (isUndefinedOrNull(info[0])) {
@@ skipping 104 matching lines @@
     }
     impl->overloadedMethodG(longArg);
 }
 
 static void overloadedMethodG2Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     TestInterfaceEmpty* testInterfaceEmptyOrNullArg;
     {
         if (!info[0]->IsUndefined()) {
-            testInterfaceEmptyOrNullArg = V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), info[0]);
+            testInterfaceEmptyOrNullArg = V8TestInterfaceEmpty::toImpl(v8::Handle<v8::Object>::Cast(info[0]));
         } else {
             testInterfaceEmptyOrNullArg = nullptr;
         }
     }
     impl->overloadedMethodG(testInterfaceEmptyOrNullArg);
 }
 
 static void overloadedMethodGMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "overloadedMethodG", "TestObject", info.Holder(), info.GetIsolate());
@@ skipping 36 matching lines @@
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
     TestObjectV8Internal::overloadedMethodGMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void overloadedMethodH1Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     TestInterfaceImplementation* testInterfaceArg;
     {
-        testInterfaceArg = V8TestInterface::toImplWithTypeCheck(info.GetIsolate(), info[0]);
+        testInterfaceArg = V8TestInterface::toImpl(v8::Handle<v8::Object>::Cast(info[0]));
     }
     impl->overloadedMethodH(testInterfaceArg);
 }
 
 static void overloadedMethodH2Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     TestInterfaceEmpty* testInterfaceEmptyArg;
     {
-        testInterfaceEmptyArg = V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), info[0]);
+        testInterfaceEmptyArg = V8TestInterfaceEmpty::toImpl(v8::Handle<v8::Object>::Cast(info[0]));
     }
     impl->overloadedMethodH(testInterfaceEmptyArg);
 }
 
 static void overloadedMethodHMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "overloadedMethodH", "TestObject", info.Holder(), info.GetIsolate());
     switch (std::min(1, info.Length())) {
     case 1:
         if (V8TestInterface::hasInstance(info[0], info.GetIsolate())) {
@@ skipping 332 matching lines @@
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
     TestObjectV8Internal::voidMethodClampUnsignedLongArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void voidMethodDefaultUndefinedTestInterfaceEmptyArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     TestInterfaceEmpty* defaultUndefinedTestInterfaceEmptyArg;
     {
-        defaultUndefinedTestInterfaceEmptyArg = V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), info[0]);
+        defaultUndefinedTestInterfaceEmptyArg = V8TestInterfaceEmpty::toImpl(v8::Handle<v8::Object>::Cast(info[0]));
     }
     impl->voidMethodDefaultUndefinedTestInterfaceEmptyArg(defaultUndefinedTestInterfaceEmptyArg);
 }
 
 static void voidMethodDefaultUndefinedTestInterfaceEmptyArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
     TestObjectV8Internal::voidMethodDefaultUndefinedTestInterfaceEmptyArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
@@ skipping 809 matching lines @@
 
 static void perWorldBindingsVoidMethodTestInterfaceEmptyArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         V8ThrowException::throwException(createMinimumArityTypeErrorForMethod("perWorldBindingsVoidMethodTestInterfaceEmptyArg", "TestObject", 1, info.Length(), info.GetIsolate()), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     TestInterfaceEmpty* testInterfaceEmptyArg;
     {
-        testInterfaceEmptyArg = V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), info[0]);
+        testInterfaceEmptyArg = V8TestInterfaceEmpty::toImpl(v8::Handle<v8::Object>::Cast(info[0]));
     }
     impl->perWorldBindingsVoidMethodTestInterfaceEmptyArg(testInterfaceEmptyArg);
 }
 
 static void perWorldBindingsVoidMethodTestInterfaceEmptyArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
     TestObjectV8Internal::perWorldBindingsVoidMethodTestInterfaceEmptyArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void perWorldBindingsVoidMethodTestInterfaceEmptyArgMethodForMainWorld(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         V8ThrowException::throwException(createMinimumArityTypeErrorForMethod("perWorldBindingsVoidMethodTestInterfaceEmptyArg", "TestObject", 1, info.Length(), info.GetIsolate()), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     TestInterfaceEmpty* testInterfaceEmptyArg;
     {
-        testInterfaceEmptyArg = V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), info[0]);
+        testInterfaceEmptyArg = V8TestInterfaceEmpty::toImpl(v8::Handle<v8::Object>::Cast(info[0]));
     }
     impl->perWorldBindingsVoidMethodTestInterfaceEmptyArg(testInterfaceEmptyArg);
 }
 
 static void perWorldBindingsVoidMethodTestInterfaceEmptyArgMethodCallbackForMainWorld(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
     TestObjectV8Internal::perWorldBindingsVoidMethodTestInterfaceEmptyArgMethodForMainWorld(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
@@ skipping 350 matching lines @@
         TOSTRING_VOID_INTERNAL(stringArg, info[0]);
     }
     impl->partiallyRuntimeEnabledOverloadedVoidMethod(stringArg);
 }
 
 static void partiallyRuntimeEnabledOverloadedVoidMethod2Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     TestInterfaceImplementation* testInterface;
     {
-        testInterface = V8TestInterface::toImplWithTypeCheck(info.GetIsolate(), info[0]);
+        testInterface = V8TestInterface::toImpl(v8::Handle<v8::Object>::Cast(info[0]));
     }
     impl->partiallyRuntimeEnabledOverloadedVoidMethod(testInterface);
 }
 
 static void partiallyRuntimeEnabledOverloadedVoidMethod3Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "partiallyRuntimeEnabledOverloadedVoidMethod", "TestObject", info.Holder(), info.GetIsolate());
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     int longArg;
     {
@@ skipping 128 matching lines @@
         V8ThrowException::throwException(createMinimumArityTypeErrorForMethod("typeCheckingInterfaceVoidMethodTestInterfaceEmptyArg", "TestObject", 1, info.Length(), info.GetIsolate()), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     TestInterfaceEmpty* testInterfaceEmptyArg;
     {
         if (info.Length() > 0 && !V8TestInterfaceEmpty::hasInstance(info[0], info.GetIsolate())) {
             V8ThrowException::throwTypeError(ExceptionMessages::failedToExecute("typeCheckingInterfaceVoidMethodTestInterfaceEmptyArg", "TestObject", "parameter 1 is not of type 'TestInterfaceEmpty'."), info.GetIsolate());
             return;
         }
-        testInterfaceEmptyArg = V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), info[0]);
+        testInterfaceEmptyArg = V8TestInterfaceEmpty::toImpl(v8::Handle<v8::Object>::Cast(info[0]));
     }
     impl->typeCheckingInterfaceVoidMethodTestInterfaceEmptyArg(testInterfaceEmptyArg);
 }
 
 static void typeCheckingInterfaceVoidMethodTestInterfaceEmptyArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
     TestObjectV8Internal::typeCheckingInterfaceVoidMethodTestInterfaceEmptyArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
@@ skipping 244 matching lines @@
 
 static void nodeMethodWithNodeArgumentImplementedInPrivateScriptMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         V8ThrowException::throwException(createMinimumArityTypeErrorForMethod("nodeMethodWithNodeArgumentImplementedInPrivateScript", "TestObject", 1, info.Length(), info.GetIsolate()), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     Node* value;
     {
-        value = V8Node::toImplWithTypeCheck(info.GetIsolate(), info[0]);
+        value = V8Node::toImpl(v8::Handle<v8::Object>::Cast(info[0]));
     }
     RefPtrWillBeRawPtr<Node> result = nullptr;
     if (!V8TestObject::PrivateScript::nodeMethodWithNodeArgumentImplementedInPrivateScriptMethod(toFrameIfNotDetached(info.GetIsolate()->GetCurrentContext()), impl, value, &result))
         return;
     v8SetReturnValue(info, result.release());
 }
 
 static void nodeMethodWithNodeArgumentImplementedInPrivateScriptMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
     TestObjectV8Internal::nodeMethodWithNodeArgumentImplementedInPrivateScriptMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void nodeMethodWithVariousArgumentsImplementedInPrivateScriptMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "nodeMethodWithVariousArgumentsImplementedInPrivateScript", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 5)) {
         setMinimumArityTypeError(exceptionState, 5, info.Length());
         exceptionState.throwIfNeeded();
         return;
     }
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     Document* document;
     Node* node;
     int value1;
     double value2;
     V8StringResource<> string;
     {
-        document = V8Document::toImplWithTypeCheck(info.GetIsolate(), info[0]);
-        node = V8Node::toImplWithTypeCheck(info.GetIsolate(), info[1]);
+        document = V8Document::toImpl(v8::Handle<v8::Object>::Cast(info[0]));
+        node = V8Node::toImpl(v8::Handle<v8::Object>::Cast(info[1]));
         TONATIVE_VOID_EXCEPTIONSTATE_INTERNAL(value1, toInt16(info[2], exceptionState), exceptionState);
         TONATIVE_VOID_EXCEPTIONSTATE_INTERNAL(value2, toDouble(info[3], exceptionState), exceptionState);
         TOSTRING_VOID_INTERNAL(string, info[4]);
     }
     RefPtrWillBeRawPtr<Node> result = nullptr;
     if (!V8TestObject::PrivateScript::nodeMethodWithVariousArgumentsImplementedInPrivateScriptMethod(toFrameIfNotDetached(info.GetIsolate()->GetCurrentContext()), impl, document, node, value1, value2, string, &result))
         return;
     v8SetReturnValue(info, result.release());
 }
 
@@ skipping 742 matching lines @@
 
     ScriptState::Scope scope(scriptState);
     v8::Handle<v8::Value> holder = toV8(holderImpl, scriptState->context()->Global(), scriptState->isolate());
 
     v8::Handle<v8::Value> valueHandle = toV8(value, scriptState->context()->Global(), scriptState->isolate());
     v8::Handle<v8::Value> argv[] = { valueHandle };
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "nodeMethodWithNodeArgumentImplementedInPrivateScript", "TestObject", scriptState->context()->Global(), scriptState->isolate());
     v8::Handle<v8::Value> v8Value = PrivateScriptRunner::runDOMMethod(scriptState, scriptStateInUserScript, "TestObject", "nodeMethodWithNodeArgumentImplementedInPrivateScript", holder, 1, argv);
     if (v8Value.IsEmpty())
         return false;
-    Node* cppValue = V8Node::toImplWithTypeCheck(scriptState->isolate(), v8Value);
+    Node* cppValue = V8Node::toImpl(v8::Handle<v8::Object>::Cast(v8Value));
     *result = cppValue;
     RELEASE_ASSERT(!exceptionState.hadException());
     return true;
 }
 
 bool V8TestObject::PrivateScript::nodeMethodWithVariousArgumentsImplementedInPrivateScriptMethod(LocalFrame* frame, TestObject* holderImpl, PassRefPtrWillBeRawPtr<Document> document, PassRefPtrWillBeRawPtr<Node> node, int value1, double value2, String string, RefPtrWillBeRawPtr<Node>* result)
 {
     if (!frame)
         return false;
     v8::HandleScope handleScope(toIsolate(frame));
@@ skipping 12 matching lines @@
     v8::Handle<v8::Value> documentHandle = toV8(document, scriptState->context()->Global(), scriptState->isolate());
     v8::Handle<v8::Value> nodeHandle = toV8(node, scriptState->context()->Global(), scriptState->isolate());
     v8::Handle<v8::Value> value1Handle = v8::Integer::New(scriptState->isolate(), value1);
     v8::Handle<v8::Value> value2Handle = v8::Number::New(scriptState->isolate(), value2);
     v8::Handle<v8::Value> stringHandle = v8String(scriptState->isolate(), string);
     v8::Handle<v8::Value> argv[] = { documentHandle, nodeHandle, value1Handle, value2Handle, stringHandle };
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "nodeMethodWithVariousArgumentsImplementedInPrivateScript", "TestObject", scriptState->context()->Global(), scriptState->isolate());
     v8::Handle<v8::Value> v8Value = PrivateScriptRunner::runDOMMethod(scriptState, scriptStateInUserScript, "TestObject", "nodeMethodWithVariousArgumentsImplementedInPrivateScript", holder, 5, argv);
     if (v8Value.IsEmpty())
         return false;
-    Node* cppValue = V8Node::toImplWithTypeCheck(scriptState->isolate(), v8Value);
+    Node* cppValue = V8Node::toImpl(v8::Handle<v8::Object>::Cast(v8Value));
     *result = cppValue;
     RELEASE_ASSERT(!exceptionState.hadException());
     return true;
 }
 
 bool V8TestObject::PrivateScript::methodForPrivateScriptOnlyMethod(LocalFrame* frame, TestObject* holderImpl, int value1, int value2, int* result)
 {
     if (!frame)
         return false;
     v8::HandleScope handleScope(toIsolate(frame));
@@ skipping 159 matching lines @@
     if (!scriptState->executionContext())
         return false;
 
     ScriptState::Scope scope(scriptState);
     v8::Handle<v8::Value> holder = toV8(holderImpl, scriptState->context()->Global(), scriptState->isolate());
 
     ExceptionState exceptionState(ExceptionState::GetterContext, "nodeAttribute", "TestObject", scriptState->context()->Global(), scriptState->isolate());
     v8::Handle<v8::Value> v8Value = PrivateScriptRunner::runDOMAttributeGetter(scriptState, scriptStateInUserScript, "TestObject", "nodeAttribute", holder);
     if (v8Value.IsEmpty())
         return false;
-    Node* cppValue = V8Node::toImplWithTypeCheck(scriptState->isolate(), v8Value);
+    Node* cppValue = V8Node::toImpl(v8::Handle<v8::Object>::Cast(v8Value));
     RELEASE_ASSERT(!exceptionState.hadException());
     *result = cppValue;
     return true;
 }
 
 bool V8TestObject::PrivateScript::nodeAttributeAttributeSetter(LocalFrame* frame, TestObject* holderImpl, PassRefPtrWillBeRawPtr<Node> cppValue)
 {
     if (!frame)
         return false;
     v8::HandleScope handleScope(toIsolate(frame));
@@ skipping 103 matching lines @@
         return false;
 
     ScriptState::Scope scope(scriptState);
     v8::Handle<v8::Value> holder = toV8(holderImpl, scriptState->context()->Global(), scriptState->isolate());
 
     ExceptionState exceptionState(ExceptionState::SetterContext, "enumForPrivateScript", "TestObject", scriptState->context()->Global(), scriptState->isolate());
     return PrivateScriptRunner::runDOMAttributeSetter(scriptState, scriptStateInUserScript, "TestObject", "enumForPrivateScript", holder, v8String(scriptState->isolate(), cppValue));
 }
 
 } // namespace blink