Generate simple code for "trivial" conversions

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 306 matching lines @@
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestObjectV8Internal::booleanAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void booleanAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
-    TONATIVE_VOID(bool, cppValue, v8Value->BooleanValue());
+    bool cppValue = v8Value->BooleanValue();
     impl->setBooleanAttribute(cppValue);
 }
 
 static void booleanAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestObjectV8Internal::booleanAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
@@ skipping 368 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);
-    TONATIVE_VOID(TestInterfaceEmpty*, cppValue, V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), v8Value));
+    TestInterfaceEmpty* cppValue = V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), 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);
-    TONATIVE_VOID(TestObject*, cppValue, V8TestObject::toImplWithTypeCheck(info.GetIsolate(), v8Value));
+    TestObject* cppValue = V8TestObject::toImplWithTypeCheck(info.GetIsolate(), 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");
 }
 
 static void voidCallbackFunctionAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
     v8SetReturnValue(info, impl->voidCallbackFunctionAttribute().v8Value());
 }
 
 static void voidCallbackFunctionAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestObjectV8Internal::voidCallbackFunctionAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void voidCallbackFunctionAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
-    TONATIVE_VOID(ScriptValue, cppValue, ScriptValue(ScriptState::current(info.GetIsolate()), v8Value));
+    ScriptValue cppValue = ScriptValue(ScriptState::current(info.GetIsolate()), v8Value);
     impl->setVoidCallbackFunctionAttribute(cppValue);
 }
 
 static void voidCallbackFunctionAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestObjectV8Internal::voidCallbackFunctionAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void anyCallbackFunctionOptionalAnyArgAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
     v8SetReturnValue(info, impl->anyCallbackFunctionOptionalAnyArgAttribute().v8Value());
 }
 
 static void anyCallbackFunctionOptionalAnyArgAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestObjectV8Internal::anyCallbackFunctionOptionalAnyArgAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void anyCallbackFunctionOptionalAnyArgAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
-    TONATIVE_VOID(ScriptValue, cppValue, ScriptValue(ScriptState::current(info.GetIsolate()), v8Value));
+    ScriptValue cppValue = ScriptValue(ScriptState::current(info.GetIsolate()), v8Value);
     impl->setAnyCallbackFunctionOptionalAnyArgAttribute(cppValue);
 }
 
 static void anyCallbackFunctionOptionalAnyArgAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestObjectV8Internal::anyCallbackFunctionOptionalAnyArgAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
@@ skipping 186 matching lines @@
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestObjectV8Internal::anyAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void anyAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
-    TONATIVE_VOID(ScriptValue, cppValue, ScriptValue(ScriptState::current(info.GetIsolate()), v8Value));
+    ScriptValue cppValue = ScriptValue(ScriptState::current(info.GetIsolate()), v8Value);
     impl->setAnyAttribute(cppValue);
 }
 
 static void anyAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestObjectV8Internal::anyAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
@@ skipping 37 matching lines @@
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestObjectV8Internal::windowAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void windowAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
-    TONATIVE_VOID(LocalDOMWindow*, cppValue, toDOMWindow(v8Value, info.GetIsolate()));
+    LocalDOMWindow* cppValue = toDOMWindow(v8Value, info.GetIsolate());
     impl->setWindowAttribute(WTF::getPtr(cppValue));
 }
 
 static void windowAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestObjectV8Internal::windowAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void documentAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
     v8SetReturnValueFast(info, WTF::getPtr(impl->documentAttribute()), impl);
 }
 
 static void documentAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     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);
-    TONATIVE_VOID(Document*, cppValue, V8Document::toImplWithTypeCheck(info.GetIsolate(), v8Value));
+    Document* cppValue = V8Document::toImplWithTypeCheck(info.GetIsolate(), 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);
-    TONATIVE_VOID(DocumentFragment*, cppValue, V8DocumentFragment::toImplWithTypeCheck(info.GetIsolate(), v8Value));
+    DocumentFragment* cppValue = V8DocumentFragment::toImplWithTypeCheck(info.GetIsolate(), 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);
-    TONATIVE_VOID(DocumentType*, cppValue, V8DocumentType::toImplWithTypeCheck(info.GetIsolate(), v8Value));
+    DocumentType* cppValue = V8DocumentType::toImplWithTypeCheck(info.GetIsolate(), 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);
-    TONATIVE_VOID(Element*, cppValue, V8Element::toImplWithTypeCheck(info.GetIsolate(), v8Value));
+    Element* cppValue = V8Element::toImplWithTypeCheck(info.GetIsolate(), 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);
-    TONATIVE_VOID(Node*, cppValue, V8Node::toImplWithTypeCheck(info.GetIsolate(), v8Value));
+    Node* cppValue = V8Node::toImplWithTypeCheck(info.GetIsolate(), 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);
-    TONATIVE_VOID(ShadowRoot*, cppValue, V8ShadowRoot::toImplWithTypeCheck(info.GetIsolate(), v8Value));
+    ShadowRoot* cppValue = V8ShadowRoot::toImplWithTypeCheck(info.GetIsolate(), 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");
 }
 
 static void arrayBufferAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
     v8SetReturnValueFast(info, WTF::getPtr(impl->arrayBufferAttribute()), impl);
 }
 
 static void arrayBufferAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestObjectV8Internal::arrayBufferAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void arrayBufferAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
-    TONATIVE_VOID(ArrayBuffer*, cppValue, v8Value->IsArrayBuffer() ? V8ArrayBuffer::toImpl(v8::Handle<v8::ArrayBuffer>::Cast(v8Value)) : 0);
+    ArrayBuffer* cppValue = v8Value->IsArrayBuffer() ? V8ArrayBuffer::toImpl(v8::Handle<v8::ArrayBuffer>::Cast(v8Value)) : 0;
     impl->setArrayBufferAttribute(WTF::getPtr(cppValue));
 }
 
 static void arrayBufferAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestObjectV8Internal::arrayBufferAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void float32ArrayAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
     v8SetReturnValueFast(info, WTF::getPtr(impl->float32ArrayAttribute()), impl);
 }
 
 static void float32ArrayAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestObjectV8Internal::float32ArrayAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void float32ArrayAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
-    TONATIVE_VOID(Float32Array*, cppValue, v8Value->IsFloat32Array() ? V8Float32Array::toImpl(v8::Handle<v8::Float32Array>::Cast(v8Value)) : 0);
+    Float32Array* cppValue = v8Value->IsFloat32Array() ? V8Float32Array::toImpl(v8::Handle<v8::Float32Array>::Cast(v8Value)) : 0;
     impl->setFloat32ArrayAttribute(WTF::getPtr(cppValue));
 }
 
 static void float32ArrayAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestObjectV8Internal::float32ArrayAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void uint8ArrayAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
     v8SetReturnValueFast(info, WTF::getPtr(impl->uint8ArrayAttribute()), impl);
 }
 
 static void uint8ArrayAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestObjectV8Internal::uint8ArrayAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void uint8ArrayAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
-    TONATIVE_VOID(Uint8Array*, cppValue, v8Value->IsUint8Array() ? V8Uint8Array::toImpl(v8::Handle<v8::Uint8Array>::Cast(v8Value)) : 0);
+    Uint8Array* cppValue = v8Value->IsUint8Array() ? V8Uint8Array::toImpl(v8::Handle<v8::Uint8Array>::Cast(v8Value)) : 0;
     impl->setUint8ArrayAttribute(WTF::getPtr(cppValue));
 }
 
 static void uint8ArrayAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestObjectV8Internal::uint8ArrayAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
@@ skipping 244 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);
-    TONATIVE_VOID(TestInterfaceImplementation*, cppValue, V8TestInterface::toImplWithTypeCheck(info.GetIsolate(), v8Value));
+    TestInterfaceImplementation* cppValue = V8TestInterface::toImplWithTypeCheck(info.GetIsolate(), 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 239 matching lines @@
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestObjectV8Internal::cachedAttributeAnyAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void cachedAttributeAnyAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
-    TONATIVE_VOID(ScriptValue, cppValue, ScriptValue(ScriptState::current(info.GetIsolate()), v8Value));
+    ScriptValue cppValue = ScriptValue(ScriptState::current(info.GetIsolate()), v8Value);
     impl->setCachedAttributeAnyAttribute(cppValue);
     V8HiddenValue::deleteHiddenValue(info.GetIsolate(), holder, v8AtomicString(info.GetIsolate(), "cachedAttributeAnyAttribute")); // Invalidate the cached value.
 }
 
 static void cachedAttributeAnyAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestObjectV8Internal::cachedAttributeAnyAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
@@ skipping 90 matching lines @@
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestObjectV8Internal::callWithExecutionContextAnyAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void callWithExecutionContextAnyAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
-    TONATIVE_VOID(ScriptValue, cppValue, ScriptValue(ScriptState::current(info.GetIsolate()), v8Value));
+    ScriptValue cppValue = ScriptValue(ScriptState::current(info.GetIsolate()), v8Value);
     ExecutionContext* executionContext = currentExecutionContext(info.GetIsolate());
     impl->setCallWithExecutionContextAnyAttribute(executionContext, cppValue);
 }
 
 static void callWithExecutionContextAnyAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestObjectV8Internal::callWithExecutionContextAnyAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
@@ skipping 10 matching lines @@
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestObjectV8Internal::callWithScriptStateAnyAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void callWithScriptStateAnyAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
-    TONATIVE_VOID(ScriptValue, cppValue, ScriptValue(ScriptState::current(info.GetIsolate()), v8Value));
+    ScriptValue cppValue = ScriptValue(ScriptState::current(info.GetIsolate()), v8Value);
     impl->setCallWithScriptStateAnyAttribute(scriptState, cppValue);
 }
 
 static void callWithScriptStateAnyAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestObjectV8Internal::callWithScriptStateAnyAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
@@ skipping 10 matching lines @@
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestObjectV8Internal::callWithExecutionContextAndScriptStateAnyAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void callWithExecutionContextAndScriptStateAnyAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
-    TONATIVE_VOID(ScriptValue, cppValue, ScriptValue(ScriptState::current(info.GetIsolate()), v8Value));
+    ScriptValue cppValue = ScriptValue(ScriptState::current(info.GetIsolate()), v8Value);
     ExecutionContext* executionContext = currentExecutionContext(info.GetIsolate());
     impl->setCallWithExecutionContextAndScriptStateAnyAttribute(scriptState, executionContext, cppValue);
 }
 
 static void callWithExecutionContextAndScriptStateAnyAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestObjectV8Internal::callWithExecutionContextAndScriptStateAnyAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
@@ skipping 996 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;
-    TONATIVE_VOID(TestInterfaceGarbageCollected*, cppValue, V8TestInterfaceGarbageCollected::toImplWithTypeCheck(info.GetIsolate(), v8Value));
+    TestInterfaceGarbageCollected* cppValue = V8TestInterfaceGarbageCollected::toImplWithTypeCheck(info.GetIsolate(), 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;
-    TONATIVE_VOID(TestInterfaceWillBeGarbageCollected*, cppValue, V8TestInterfaceWillBeGarbageCollected::toImplWithTypeCheck(info.GetIsolate(), v8Value));
+    TestInterfaceWillBeGarbageCollected* cppValue = V8TestInterfaceWillBeGarbageCollected::toImplWithTypeCheck(info.GetIsolate(), 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);
-    TONATIVE_VOID(TestInterfaceEmpty*, cppValue, V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), v8Value));
+    TestInterfaceEmpty* cppValue = V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), 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 23 matching lines @@
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestObjectV8Internal::cachedAttributeRaisesExceptionGetterAnyAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void cachedAttributeRaisesExceptionGetterAnyAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     ExceptionState exceptionState(ExceptionState::SetterContext, "cachedAttributeRaisesExceptionGetterAnyAttribute", "TestObject", holder, info.GetIsolate());
     TestObject* impl = V8TestObject::toImpl(holder);
-    TONATIVE_VOID(ScriptValue, cppValue, ScriptValue(ScriptState::current(info.GetIsolate()), v8Value));
+    ScriptValue cppValue = ScriptValue(ScriptState::current(info.GetIsolate()), v8Value);
     impl->setCachedAttributeRaisesExceptionGetterAnyAttribute(cppValue, exceptionState);
     exceptionState.throwIfNeeded();
     V8HiddenValue::deleteHiddenValue(info.GetIsolate(), holder, v8AtomicString(info.GetIsolate(), "cachedAttributeRaisesExceptionGetterAnyAttribute")); // Invalidate the cached value.
 }
 
 static void cachedAttributeRaisesExceptionGetterAnyAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestObjectV8Internal::cachedAttributeRaisesExceptionGetterAnyAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
@@ skipping 10 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);
-    TONATIVE_VOID(TestInterfaceImplementation*, cppValue, V8TestInterface::toImplWithTypeCheck(info.GetIsolate(), v8Value));
+    TestInterfaceImplementation* cppValue = V8TestInterface::toImplWithTypeCheck(info.GetIsolate(), 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);
-    TONATIVE_VOID(TestInterfaceImplementation*, cppValue, V8TestInterface::toImplWithTypeCheck(info.GetIsolate(), v8Value));
+    TestInterfaceImplementation* cppValue = V8TestInterface::toImplWithTypeCheck(info.GetIsolate(), 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 10 matching lines @@
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestObjectV8Internal::reflectBooleanAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void reflectBooleanAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toImpl(holder);
-    TONATIVE_VOID(bool, cppValue, v8Value->BooleanValue());
+    bool cppValue = v8Value->BooleanValue();
     CustomElementProcessingStack::CallbackDeliveryScope deliveryScope;
     impl->setBooleanAttribute(HTMLNames::reflectbooleanattributeAttr, cppValue);
 }
 
 static void reflectBooleanAttributeAttributeSetterCallback(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::reflectBooleanAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
@@ skipping 1070 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);
-    TONATIVE_VOID(TestInterfaceImplementation*, cppValue, V8TestInterface::toImplWithTypeCheck(info.GetIsolate(), v8Value));
+    TestInterfaceImplementation* cppValue = V8TestInterface::toImplWithTypeCheck(info.GetIsolate(), 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);
-    TONATIVE_VOID(TestInterfaceImplementation*, cppValue, V8TestInterface::toImplWithTypeCheck(info.GetIsolate(), v8Value));
+    TestInterfaceImplementation* cppValue = V8TestInterface::toImplWithTypeCheck(info.GetIsolate(), 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);
-    TONATIVE_VOID(TestInterfaceImplementation*, cppValue, V8TestInterface::toImplWithTypeCheck(info.GetIsolate(), v8Value));
+    TestInterfaceImplementation* cppValue = V8TestInterface::toImplWithTypeCheck(info.GetIsolate(), 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);
-    TONATIVE_VOID(TestInterfaceGarbageCollected*, cppValue, V8TestInterfaceGarbageCollected::toImplWithTypeCheck(info.GetIsolate(), v8Value));
+    TestInterfaceGarbageCollected* cppValue = V8TestInterfaceGarbageCollected::toImplWithTypeCheck(info.GetIsolate(), 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);
-    TONATIVE_VOID(TestInterfaceGarbageCollected*, cppValue, V8TestInterfaceGarbageCollected::toImplWithTypeCheck(info.GetIsolate(), v8Value));
+    TestInterfaceGarbageCollected* cppValue = V8TestInterfaceGarbageCollected::toImplWithTypeCheck(info.GetIsolate(), 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);
-    TONATIVE_VOID(TestInterfaceWillBeGarbageCollected*, cppValue, V8TestInterfaceWillBeGarbageCollected::toImplWithTypeCheck(info.GetIsolate(), v8Value));
+    TestInterfaceWillBeGarbageCollected* cppValue = V8TestInterfaceWillBeGarbageCollected::toImplWithTypeCheck(info.GetIsolate(), 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);
-    TONATIVE_VOID(TestInterfaceWillBeGarbageCollected*, cppValue, V8TestInterfaceWillBeGarbageCollected::toImplWithTypeCheck(info.GetIsolate(), v8Value));
+    TestInterfaceWillBeGarbageCollected* cppValue = V8TestInterfaceWillBeGarbageCollected::toImplWithTypeCheck(info.GetIsolate(), 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);
-    TONATIVE_VOID(Node*, cppValue, V8Node::toImplWithTypeCheck(info.GetIsolate(), v8Value));
+    Node* cppValue = V8Node::toImplWithTypeCheck(info.GetIsolate(), 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 446 matching lines @@
 
 static void voidMethodBooleanArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         V8ThrowException::throwException(createMinimumArityTypeErrorForMethod("voidMethodBooleanArg", "TestObject", 1, info.Length(), info.GetIsolate()), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     bool booleanArg;
     {
-        v8::TryCatch block;
-        V8RethrowTryCatchScope rethrow(block);
-        TONATIVE_VOID_INTERNAL(booleanArg, info[0]->BooleanValue());
+        booleanArg = info[0]->BooleanValue();
     }
     impl->voidMethodBooleanArg(booleanArg);
 }
 
 static void voidMethodBooleanArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
     TestObjectV8Internal::voidMethodBooleanArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
@@ skipping 243 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;
     {
-        v8::TryCatch block;
-        V8RethrowTryCatchScope rethrow(block);
-        TONATIVE_VOID_INTERNAL(testInterfaceEmptyArg, V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), info[0]));
+        testInterfaceEmptyArg = V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), 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;
     {
-        v8::TryCatch block;
-        V8RethrowTryCatchScope rethrow(block);
         TONATIVE_VOID_EXCEPTIONSTATE_INTERNAL(longArg, toInt32(info[0], exceptionState), exceptionState);
-        TONATIVE_VOID_INTERNAL(testInterfaceEmptyArg, V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), info[1]));
+        testInterfaceEmptyArg = V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), 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 28 matching lines @@
 {
     if (UNLIKELY(info.Length() < 1)) {
         V8ThrowException::throwException(createMinimumArityTypeErrorForMethod("voidMethodVoidCallbackFunctionArg", "TestObject", 1, info.Length(), info.GetIsolate()), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     ScriptValue voidCallbackFunctionArg;
     {
         v8::TryCatch block;
         V8RethrowTryCatchScope rethrow(block);
-        TONATIVE_VOID_INTERNAL(voidCallbackFunctionArg, ScriptValue(ScriptState::current(info.GetIsolate()), info[0]));
+        voidCallbackFunctionArg = ScriptValue(ScriptState::current(info.GetIsolate()), info[0]);
     }
     impl->voidMethodVoidCallbackFunctionArg(voidCallbackFunctionArg);
 }
 
 static void voidMethodVoidCallbackFunctionArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
     TestObjectV8Internal::voidMethodVoidCallbackFunctionArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void voidMethodAnyCallbackFunctionOptionalAnyArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         V8ThrowException::throwException(createMinimumArityTypeErrorForMethod("voidMethodAnyCallbackFunctionOptionalAnyArg", "TestObject", 1, info.Length(), info.GetIsolate()), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     ScriptValue anyCallbackFunctionOptionalAnyArgArg;
     {
         v8::TryCatch block;
         V8RethrowTryCatchScope rethrow(block);
-        TONATIVE_VOID_INTERNAL(anyCallbackFunctionOptionalAnyArgArg, ScriptValue(ScriptState::current(info.GetIsolate()), info[0]));
+        anyCallbackFunctionOptionalAnyArgArg = ScriptValue(ScriptState::current(info.GetIsolate()), info[0]);
     }
     impl->voidMethodAnyCallbackFunctionOptionalAnyArg(anyCallbackFunctionOptionalAnyArgArg);
 }
 
 static void voidMethodAnyCallbackFunctionOptionalAnyArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
     TestObjectV8Internal::voidMethodAnyCallbackFunctionOptionalAnyArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
@@ skipping 49 matching lines @@
 
 static void voidMethodEventTargetArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         V8ThrowException::throwException(createMinimumArityTypeErrorForMethod("voidMethodEventTargetArg", "TestObject", 1, info.Length(), info.GetIsolate()), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     EventTarget* eventTargetArg;
     {
-        v8::TryCatch block;
-        V8RethrowTryCatchScope rethrow(block);
-        TONATIVE_VOID_INTERNAL(eventTargetArg, V8DOMWrapper::isDOMWrapper(info[0]) ? toWrapperTypeInfo(v8::Handle<v8::Object>::Cast(info[0]))->toEventTarget(v8::Handle<v8::Object>::Cast(info[0])) : 0);
+        eventTargetArg = V8DOMWrapper::isDOMWrapper(info[0]) ? toWrapperTypeInfo(v8::Handle<v8::Object>::Cast(info[0]))->toEventTarget(v8::Handle<v8::Object>::Cast(info[0])) : 0;
     }
     impl->voidMethodEventTargetArg(eventTargetArg);
 }
 
 static void voidMethodEventTargetArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
     TestObjectV8Internal::voidMethodEventTargetArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void voidMethodAnyArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         V8ThrowException::throwException(createMinimumArityTypeErrorForMethod("voidMethodAnyArg", "TestObject", 1, info.Length(), info.GetIsolate()), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     ScriptValue anyArg;
     {
         v8::TryCatch block;
         V8RethrowTryCatchScope rethrow(block);
-        TONATIVE_VOID_INTERNAL(anyArg, ScriptValue(ScriptState::current(info.GetIsolate()), info[0]));
+        anyArg = ScriptValue(ScriptState::current(info.GetIsolate()), info[0]);
     }
     impl->voidMethodAnyArg(anyArg);
 }
 
 static void voidMethodAnyArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
     TestObjectV8Internal::voidMethodAnyArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 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;
     {
-        v8::TryCatch block;
-        V8RethrowTryCatchScope rethrow(block);
-        TONATIVE_VOID_INTERNAL(attrArg, V8Attr::toImplWithTypeCheck(info.GetIsolate(), info[0]));
+        attrArg = V8Attr::toImplWithTypeCheck(info.GetIsolate(), 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;
     {
-        v8::TryCatch block;
-        V8RethrowTryCatchScope rethrow(block);
-        TONATIVE_VOID_INTERNAL(documentArg, V8Document::toImplWithTypeCheck(info.GetIsolate(), info[0]));
+        documentArg = V8Document::toImplWithTypeCheck(info.GetIsolate(), 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;
     {
-        v8::TryCatch block;
-        V8RethrowTryCatchScope rethrow(block);
-        TONATIVE_VOID_INTERNAL(documentTypeArg, V8DocumentType::toImplWithTypeCheck(info.GetIsolate(), info[0]));
+        documentTypeArg = V8DocumentType::toImplWithTypeCheck(info.GetIsolate(), 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;
     {
-        v8::TryCatch block;
-        V8RethrowTryCatchScope rethrow(block);
-        TONATIVE_VOID_INTERNAL(elementArg, V8Element::toImplWithTypeCheck(info.GetIsolate(), info[0]));
+        elementArg = V8Element::toImplWithTypeCheck(info.GetIsolate(), 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;
     {
-        v8::TryCatch block;
-        V8RethrowTryCatchScope rethrow(block);
-        TONATIVE_VOID_INTERNAL(nodeArg, V8Node::toImplWithTypeCheck(info.GetIsolate(), info[0]));
+        nodeArg = V8Node::toImplWithTypeCheck(info.GetIsolate(), 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 65 matching lines @@
 
 static void voidMethodArrayBufferArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         V8ThrowException::throwException(createMinimumArityTypeErrorForMethod("voidMethodArrayBufferArg", "TestObject", 1, info.Length(), info.GetIsolate()), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     ArrayBuffer* arrayBufferArg;
     {
-        v8::TryCatch block;
-        V8RethrowTryCatchScope rethrow(block);
-        TONATIVE_VOID_INTERNAL(arrayBufferArg, info[0]->IsArrayBuffer() ? V8ArrayBuffer::toImpl(v8::Handle<v8::ArrayBuffer>::Cast(info[0])) : 0);
+        arrayBufferArg = info[0]->IsArrayBuffer() ? V8ArrayBuffer::toImpl(v8::Handle<v8::ArrayBuffer>::Cast(info[0])) : 0;
     }
     impl->voidMethodArrayBufferArg(arrayBufferArg);
 }
 
 static void voidMethodArrayBufferArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
     TestObjectV8Internal::voidMethodArrayBufferArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void voidMethodArrayBufferOrNullArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         V8ThrowException::throwException(createMinimumArityTypeErrorForMethod("voidMethodArrayBufferOrNullArg", "TestObject", 1, info.Length(), info.GetIsolate()), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     ArrayBuffer* arrayBufferArg;
     {
-        v8::TryCatch block;
-        V8RethrowTryCatchScope rethrow(block);
-        TONATIVE_VOID_INTERNAL(arrayBufferArg, info[0]->IsArrayBuffer() ? V8ArrayBuffer::toImpl(v8::Handle<v8::ArrayBuffer>::Cast(info[0])) : 0);
+        arrayBufferArg = info[0]->IsArrayBuffer() ? V8ArrayBuffer::toImpl(v8::Handle<v8::ArrayBuffer>::Cast(info[0])) : 0;
     }
     impl->voidMethodArrayBufferOrNullArg(arrayBufferArg);
 }
 
 static void voidMethodArrayBufferOrNullArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
     TestObjectV8Internal::voidMethodArrayBufferOrNullArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void voidMethodArrayBufferViewArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         V8ThrowException::throwException(createMinimumArityTypeErrorForMethod("voidMethodArrayBufferViewArg", "TestObject", 1, info.Length(), info.GetIsolate()), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     ArrayBufferView* arrayBufferViewArg;
     {
-        v8::TryCatch block;
-        V8RethrowTryCatchScope rethrow(block);
-        TONATIVE_VOID_INTERNAL(arrayBufferViewArg, info[0]->IsArrayBufferView() ? V8ArrayBufferView::toImpl(v8::Handle<v8::ArrayBufferView>::Cast(info[0])) : 0);
+        arrayBufferViewArg = info[0]->IsArrayBufferView() ? V8ArrayBufferView::toImpl(v8::Handle<v8::ArrayBufferView>::Cast(info[0])) : 0;
     }
     impl->voidMethodArrayBufferViewArg(arrayBufferViewArg);
 }
 
 static void voidMethodArrayBufferViewArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
     TestObjectV8Internal::voidMethodArrayBufferViewArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void voidMethodFloat32ArrayArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         V8ThrowException::throwException(createMinimumArityTypeErrorForMethod("voidMethodFloat32ArrayArg", "TestObject", 1, info.Length(), info.GetIsolate()), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     Float32Array* float32ArrayArg;
     {
-        v8::TryCatch block;
-        V8RethrowTryCatchScope rethrow(block);
-        TONATIVE_VOID_INTERNAL(float32ArrayArg, info[0]->IsFloat32Array() ? V8Float32Array::toImpl(v8::Handle<v8::Float32Array>::Cast(info[0])) : 0);
+        float32ArrayArg = info[0]->IsFloat32Array() ? V8Float32Array::toImpl(v8::Handle<v8::Float32Array>::Cast(info[0])) : 0;
     }
     impl->voidMethodFloat32ArrayArg(float32ArrayArg);
 }
 
 static void voidMethodFloat32ArrayArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
     TestObjectV8Internal::voidMethodFloat32ArrayArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void voidMethodInt32ArrayArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         V8ThrowException::throwException(createMinimumArityTypeErrorForMethod("voidMethodInt32ArrayArg", "TestObject", 1, info.Length(), info.GetIsolate()), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     Int32Array* int32ArrayArg;
     {
-        v8::TryCatch block;
-        V8RethrowTryCatchScope rethrow(block);
-        TONATIVE_VOID_INTERNAL(int32ArrayArg, info[0]->IsInt32Array() ? V8Int32Array::toImpl(v8::Handle<v8::Int32Array>::Cast(info[0])) : 0);
+        int32ArrayArg = info[0]->IsInt32Array() ? V8Int32Array::toImpl(v8::Handle<v8::Int32Array>::Cast(info[0])) : 0;
     }
     impl->voidMethodInt32ArrayArg(int32ArrayArg);
 }
 
 static void voidMethodInt32ArrayArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
     TestObjectV8Internal::voidMethodInt32ArrayArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void voidMethodUint8ArrayArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         V8ThrowException::throwException(createMinimumArityTypeErrorForMethod("voidMethodUint8ArrayArg", "TestObject", 1, info.Length(), info.GetIsolate()), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     Uint8Array* uint8ArrayArg;
     {
-        v8::TryCatch block;
-        V8RethrowTryCatchScope rethrow(block);
-        TONATIVE_VOID_INTERNAL(uint8ArrayArg, info[0]->IsUint8Array() ? V8Uint8Array::toImpl(v8::Handle<v8::Uint8Array>::Cast(info[0])) : 0);
+        uint8ArrayArg = info[0]->IsUint8Array() ? V8Uint8Array::toImpl(v8::Handle<v8::Uint8Array>::Cast(info[0])) : 0;
     }
     impl->voidMethodUint8ArrayArg(uint8ArrayArg);
 }
 
 static void voidMethodUint8ArrayArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
     TestObjectV8Internal::voidMethodUint8ArrayArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
@@ skipping 353 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;
     {
-        v8::TryCatch block;
-        V8RethrowTryCatchScope rethrow(block);
-        TONATIVE_VOID_INTERNAL(nullableTestInterfaceEmptyArg, V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), info[0]));
+        nullableTestInterfaceEmptyArg = V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), 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 331 matching lines @@
 
 static void voidMethodXPathNSResolverArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         V8ThrowException::throwException(createMinimumArityTypeErrorForMethod("voidMethodXPathNSResolverArg", "TestObject", 1, info.Length(), info.GetIsolate()), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     RefPtrWillBeRawPtr<XPathNSResolver> xPathNSResolverArg;
     {
-        v8::TryCatch block;
-        V8RethrowTryCatchScope rethrow(block);
-        TONATIVE_VOID_INTERNAL(xPathNSResolverArg, toXPathNSResolver(info[0], info.GetIsolate()));
+        xPathNSResolverArg = toXPathNSResolver(info[0], info.GetIsolate());
     }
     impl->voidMethodXPathNSResolverArg(xPathNSResolverArg.release());
 }
 
 static void voidMethodXPathNSResolverArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
     TestObjectV8Internal::voidMethodXPathNSResolverArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
@@ skipping 122 matching lines @@
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
     TestObjectV8Internal::voidMethodOptionalStringArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void voidMethodOptionalTestInterfaceEmptyArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     TestInterfaceEmpty* optionalTestInterfaceEmptyArg;
     {
-        v8::TryCatch block;
-        V8RethrowTryCatchScope rethrow(block);
         if (UNLIKELY(info.Length() <= 0)) {
             impl->voidMethodOptionalTestInterfaceEmptyArg();
             return;
         }
-        TONATIVE_VOID_INTERNAL(optionalTestInterfaceEmptyArg, V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), info[0]));
+        optionalTestInterfaceEmptyArg = V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), 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 155 matching lines @@
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "voidMethodLongArgOptionalTestInterfaceEmptyArg", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         setMinimumArityTypeError(exceptionState, 1, info.Length());
         exceptionState.throwIfNeeded();
         return;
     }
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     int longArg;
     TestInterfaceEmpty* optionalTestInterfaceEmpty;
     {
-        v8::TryCatch block;
-        V8RethrowTryCatchScope rethrow(block);
         TONATIVE_VOID_EXCEPTIONSTATE_INTERNAL(longArg, toInt32(info[0], exceptionState), exceptionState);
         if (UNLIKELY(info.Length() <= 1)) {
             impl->voidMethodLongArgOptionalTestInterfaceEmptyArg(longArg);
             return;
         }
-        TONATIVE_VOID_INTERNAL(optionalTestInterfaceEmpty, V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), info[1]));
+        optionalTestInterfaceEmpty = V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), 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;
     {
-        v8::TryCatch block;
-        V8RethrowTryCatchScope rethrow(block);
-        TONATIVE_VOID_INTERNAL(optionalTestInterfaceEmpty, V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), info[0]));
+        optionalTestInterfaceEmpty = V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), 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 123 matching lines @@
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
     TestObjectV8Internal::voidMethodDefaultDoubleArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void voidMethodDefaultTrueBooleanArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     bool defaultBooleanArg;
     {
-        v8::TryCatch block;
-        V8RethrowTryCatchScope rethrow(block);
         if (!info[0]->IsUndefined()) {
-            TONATIVE_VOID_INTERNAL(defaultBooleanArg, info[0]->BooleanValue());
+            defaultBooleanArg = info[0]->BooleanValue();
         } else {
             defaultBooleanArg = true;
         }
     }
     impl->voidMethodDefaultTrueBooleanArg(defaultBooleanArg);
 }
 
 static void voidMethodDefaultTrueBooleanArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
     TestObjectV8Internal::voidMethodDefaultTrueBooleanArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void voidMethodDefaultFalseBooleanArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     bool defaultBooleanArg;
     {
-        v8::TryCatch block;
-        V8RethrowTryCatchScope rethrow(block);
         if (!info[0]->IsUndefined()) {
-            TONATIVE_VOID_INTERNAL(defaultBooleanArg, info[0]->BooleanValue());
+            defaultBooleanArg = info[0]->BooleanValue();
         } else {
             defaultBooleanArg = false;
         }
     }
     impl->voidMethodDefaultFalseBooleanArg(defaultBooleanArg);
 }
 
 static void voidMethodDefaultFalseBooleanArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
@@ skipping 42 matching lines @@
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
     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;
     {
-        v8::TryCatch block;
-        V8RethrowTryCatchScope rethrow(block);
         if (!info[0]->IsUndefined()) {
-            TONATIVE_VOID_INTERNAL(defaultTestInterfaceArg, V8TestInterface::toImplWithTypeCheck(info.GetIsolate(), info[0]));
+            defaultTestInterfaceArg = V8TestInterface::toImplWithTypeCheck(info.GetIsolate(), 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 71 matching lines @@
 static void voidMethodTestInterfaceEmptyArgVariadicTestInterfaceEmptyArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         V8ThrowException::throwException(createMinimumArityTypeErrorForMethod("voidMethodTestInterfaceEmptyArgVariadicTestInterfaceEmptyArg", "TestObject", 1, info.Length(), info.GetIsolate()), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     TestInterfaceEmpty* testInterfaceEmptyArg;
     Vector<RefPtr<TestInterfaceEmpty> > variadicTestInterfaceEmptyArgs;
     {
-        v8::TryCatch block;
-        V8RethrowTryCatchScope rethrow(block);
-        TONATIVE_VOID_INTERNAL(testInterfaceEmptyArg, V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), info[0]));
+        testInterfaceEmptyArg = V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), info[0]);
         for (int i = 1; i < info.Length(); ++i) {
             if (!V8TestInterfaceEmpty::hasInstance(info[i], info.GetIsolate())) {
                 V8ThrowException::throwTypeError(ExceptionMessages::failedToExecute("voidMethodTestInterfaceEmptyArgVariadicTestInterfaceEmptyArg", "TestObject", "parameter 2 is not of type 'TestInterfaceEmpty'."), info.GetIsolate());
                 return;
             }
             variadicTestInterfaceEmptyArgs.append(V8TestInterfaceEmpty::toImpl(v8::Handle<v8::Object>::Cast(info[i])));
         }
     }
     impl->voidMethodTestInterfaceEmptyArgVariadicTestInterfaceEmptyArg(testInterfaceEmptyArg, variadicTestInterfaceEmptyArgs);
 }
@@ skipping 184 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;
     {
-        v8::TryCatch block;
-        V8RethrowTryCatchScope rethrow(block);
-        TONATIVE_VOID_INTERNAL(testInterfaceEmptyArg, V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), info[0]));
+        testInterfaceEmptyArg = V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), 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 83 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;
     {
-        v8::TryCatch block;
-        V8RethrowTryCatchScope rethrow(block);
-        TONATIVE_VOID_INTERNAL(testInterfaceEmptyOrNullArg, V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), info[0]));
+        testInterfaceEmptyOrNullArg = V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), 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 103 matching lines @@
         TONATIVE_VOID_EXCEPTIONSTATE_INTERNAL(longArg, toInt32(info[0], exceptionState), exceptionState);
     }
     impl->overloadedMethodG(longArg);
 }
 
 static void overloadedMethodG2Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     TestInterfaceEmpty* testInterfaceEmptyOrNullArg;
     {
-        v8::TryCatch block;
-        V8RethrowTryCatchScope rethrow(block);
         if (!info[0]->IsUndefined()) {
-            TONATIVE_VOID_INTERNAL(testInterfaceEmptyOrNullArg, V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), info[0]));
+            testInterfaceEmptyOrNullArg = V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), 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;
     {
-        v8::TryCatch block;
-        V8RethrowTryCatchScope rethrow(block);
-        TONATIVE_VOID_INTERNAL(testInterfaceArg, V8TestInterface::toImplWithTypeCheck(info.GetIsolate(), info[0]));
+        testInterfaceArg = V8TestInterface::toImplWithTypeCheck(info.GetIsolate(), info[0]);
     }
     impl->overloadedMethodH(testInterfaceArg);
 }
 
 static void overloadedMethodH2Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     TestInterfaceEmpty* testInterfaceEmptyArg;
     {
-        v8::TryCatch block;
-        V8RethrowTryCatchScope rethrow(block);
-        TONATIVE_VOID_INTERNAL(testInterfaceEmptyArg, V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), info[0]));
+        testInterfaceEmptyArg = V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), 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;
     {
-        v8::TryCatch block;
-        V8RethrowTryCatchScope rethrow(block);
-        TONATIVE_VOID_INTERNAL(defaultUndefinedTestInterfaceEmptyArg, V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), info[0]));
+        defaultUndefinedTestInterfaceEmptyArg = V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), 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 209 matching lines @@
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
     TestObjectV8Internal::callWithScriptStateScriptArgumentsVoidMethodMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void callWithScriptStateScriptArgumentsVoidMethodOptionalBooleanArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     bool optionalBooleanArg;
     {
-        v8::TryCatch block;
-        V8RethrowTryCatchScope rethrow(block);
         if (UNLIKELY(info.Length() <= 0)) {
             ScriptState* scriptState = ScriptState::current(info.GetIsolate());
             RefPtrWillBeRawPtr<ScriptArguments> scriptArguments(createScriptArguments(scriptState, info, 1));
             impl->callWithScriptStateScriptArgumentsVoidMethodOptionalBooleanArg(scriptState, scriptArguments.release());
             return;
         }
-        TONATIVE_VOID_INTERNAL(optionalBooleanArg, info[0]->BooleanValue());
+        optionalBooleanArg = info[0]->BooleanValue();
     }
     ScriptState* scriptState = ScriptState::current(info.GetIsolate());
     RefPtrWillBeRawPtr<ScriptArguments> scriptArguments(createScriptArguments(scriptState, info, 1));
     impl->callWithScriptStateScriptArgumentsVoidMethodOptionalBooleanArg(scriptState, scriptArguments.release(), optionalBooleanArg);
 }
 
 static void callWithScriptStateScriptArgumentsVoidMethodOptionalBooleanArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
     TestObjectV8Internal::callWithScriptStateScriptArgumentsVoidMethodOptionalBooleanArgMethod(info);
@@ skipping 572 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;
     {
-        v8::TryCatch block;
-        V8RethrowTryCatchScope rethrow(block);
-        TONATIVE_VOID_INTERNAL(testInterfaceEmptyArg, V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), info[0]));
+        testInterfaceEmptyArg = V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), 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;
     {
-        v8::TryCatch block;
-        V8RethrowTryCatchScope rethrow(block);
-        TONATIVE_VOID_INTERNAL(testInterfaceEmptyArg, V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), info[0]));
+        testInterfaceEmptyArg = V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), 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 345 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;
     {
-        v8::TryCatch block;
-        V8RethrowTryCatchScope rethrow(block);
-        TONATIVE_VOID_INTERNAL(testInterface, V8TestInterface::toImplWithTypeCheck(info.GetIsolate(), info[0]));
+        testInterface = V8TestInterface::toImplWithTypeCheck(info.GetIsolate(), 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 124 matching lines @@
 
 static void typeCheckingInterfaceVoidMethodTestInterfaceEmptyArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         V8ThrowException::throwException(createMinimumArityTypeErrorForMethod("typeCheckingInterfaceVoidMethodTestInterfaceEmptyArg", "TestObject", 1, info.Length(), info.GetIsolate()), info.GetIsolate());
         return;
     }
     TestObject* impl = V8TestObject::toImpl(info.Holder());
     TestInterfaceEmpty* testInterfaceEmptyArg;
     {
-        v8::TryCatch block;
-        V8RethrowTryCatchScope rethrow(block);
         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;
         }
-        TONATIVE_VOID_INTERNAL(testInterfaceEmptyArg, V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), info[0]));
+        testInterfaceEmptyArg = V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), 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 242 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;
     {
-        v8::TryCatch block;
-        V8RethrowTryCatchScope rethrow(block);
-        TONATIVE_VOID_INTERNAL(value, V8Node::toImplWithTypeCheck(info.GetIsolate(), info[0]));
+        value = V8Node::toImplWithTypeCheck(info.GetIsolate(), 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;
     {
-        v8::TryCatch block;
-        V8RethrowTryCatchScope rethrow(block);
-        TONATIVE_VOID_INTERNAL(document, V8Document::toImplWithTypeCheck(info.GetIsolate(), info[0]));
-        TONATIVE_VOID_INTERNAL(node, V8Node::toImplWithTypeCheck(info.GetIsolate(), info[1]));
+        document = V8Document::toImplWithTypeCheck(info.GetIsolate(), info[0]);
+        node = V8Node::toImplWithTypeCheck(info.GetIsolate(), 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 755 matching lines @@
     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::TryCatch block;
     v8::Handle<v8::Value> v8Value = PrivateScriptRunner::runDOMMethod(scriptState, "TestObject", "nodeMethodWithNodeArgumentImplementedInPrivateScript", holder, 1, argv);
     if (block.HasCaught()) {
         PrivateScriptRunner::rethrowExceptionInPrivateScript(scriptState->isolate(), exceptionState, block);
         block.ReThrow();
         return false;
     }
-    TONATIVE_DEFAULT(Node*, cppValue, V8Node::toImplWithTypeCheck(scriptState->isolate(), v8Value), false);
+    Node* cppValue = V8Node::toImplWithTypeCheck(scriptState->isolate(), v8Value);
     RELEASE_ASSERT(!exceptionState.hadException());
     *result = cppValue;
     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 15 matching lines @@
     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::TryCatch block;
     v8::Handle<v8::Value> v8Value = PrivateScriptRunner::runDOMMethod(scriptState, "TestObject", "nodeMethodWithVariousArgumentsImplementedInPrivateScript", holder, 5, argv);
     if (block.HasCaught()) {
         PrivateScriptRunner::rethrowExceptionInPrivateScript(scriptState->isolate(), exceptionState, block);
         block.ReThrow();
         return false;
     }
-    TONATIVE_DEFAULT(Node*, cppValue, V8Node::toImplWithTypeCheck(scriptState->isolate(), v8Value), false);
+    Node* cppValue = V8Node::toImplWithTypeCheck(scriptState->isolate(), v8Value);
     RELEASE_ASSERT(!exceptionState.hadException());
     *result = cppValue;
     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 186 matching lines @@
     v8::Handle<v8::Value> holder = toV8(holderImpl, scriptState->context()->Global(), scriptState->isolate());
 
     ExceptionState exceptionState(ExceptionState::GetterContext, "nodeAttribute", "TestObject", scriptState->context()->Global(), scriptState->isolate());
     v8::TryCatch block;
     v8::Handle<v8::Value> v8Value = PrivateScriptRunner::runDOMAttributeGetter(scriptState, "TestObject", "nodeAttribute", holder);
     if (block.HasCaught()) {
         PrivateScriptRunner::rethrowExceptionInPrivateScript(scriptState->isolate(), exceptionState, block);
         block.ReThrow();
         return false;
     }
-    TONATIVE_DEFAULT(Node*, cppValue, V8Node::toImplWithTypeCheck(scriptState->isolate(), v8Value), false);
+    Node* cppValue = V8Node::toImplWithTypeCheck(scriptState->isolate(), 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 127 matching lines @@
     PrivateScriptRunner::runDOMAttributeSetter(scriptState, "TestObject", "enumForPrivateScript", holder, v8String(scriptState->isolate(), cppValue));
     if (block.HasCaught()) {
         PrivateScriptRunner::rethrowExceptionInPrivateScript(scriptState->isolate(), exceptionState, block);
         block.ReThrow();
         return false;
     }
     return true;
 }
 
 } // namespace blink