Bindings: use |holder| local variable in attribute getters and setters

Source/bindings/tests/results/V8TestObjectPython.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 "V8TestObjectPython.h"
 
 #include "HTMLNames.h"
@@ skipping 67 matching lines @@
 
 namespace WebCore {
 const WrapperTypeInfo V8TestObjectPython::wrapperTypeInfo = { gin::kEmbedderBlink, V8TestObjectPython::domTemplate, V8TestObjectPython::derefObject, 0, 0, 0, V8TestObjectPython::installPerContextEnabledMethods, 0, WrapperTypeObjectPrototype, false };
 
 namespace TestObjectPythonV8Internal {
 
 template <typename T> void V8_USE(T) { }
 
 static void readonlyStringAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueString(info, impl->readonlyStringAttribute(), info.GetIsolate());
 }
 
 static void readonlyStringAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::readonlyStringAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void readonlyTestInterfaceEmptyAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     RefPtr<TestInterfaceEmpty> result(impl->readonlyTestInterfaceEmptyAttribute());
     if (result && DOMDataStore::setReturnValueFromWrapper<V8TestInterfaceEmpty>(info.GetReturnValue(), result.get()))
         return;
-    v8::Handle<v8::Value> wrapper = toV8(result.get(), info.Holder(), info.GetIsolate());
+    v8::Handle<v8::Value> wrapper = toV8(result.get(), holder, info.GetIsolate());
     if (!wrapper.IsEmpty()) {
-        V8HiddenValue::setHiddenValue(info.GetIsolate(), info.Holder(), v8AtomicString(info.GetIsolate(), "readonlyTestInterfaceEmptyAttribute"), wrapper);
+        V8HiddenValue::setHiddenValue(info.GetIsolate(), holder, v8AtomicString(info.GetIsolate(), "readonlyTestInterfaceEmptyAttribute"), wrapper);
         v8SetReturnValue(info, wrapper);
     }
 }
 
 static void readonlyTestInterfaceEmptyAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::readonlyTestInterfaceEmptyAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void readonlyLongAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueInt(info, impl->readonlyLongAttribute());
 }
 
 static void readonlyLongAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::readonlyLongAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void dateAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValue(info, v8DateOrNull(impl->dateAttribute(), info.GetIsolate()));
 }
 
 static void dateAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::dateAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void dateAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_VOID(double, cppValue, toCoreDate(jsValue));
     impl->setDateAttribute(cppValue);
 }
 
 static void dateAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::dateAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void stringAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueString(info, impl->stringAttribute(), info.GetIsolate());
 }
 
 static void stringAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::stringAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void stringAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, cppValue, jsValue);
     impl->setStringAttribute(cppValue);
 }
 
 static void stringAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::stringAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void readonlyDOMTimeStampAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValue(info, static_cast<double>(impl->readonlyDOMTimeStampAttribute()));
 }
 
 static void readonlyDOMTimeStampAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::readonlyDOMTimeStampAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void booleanAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueBool(info, impl->booleanAttribute());
 }
 
 static void booleanAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::booleanAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void booleanAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_VOID(bool, cppValue, jsValue->BooleanValue());
     impl->setBooleanAttribute(cppValue);
 }
 
 static void booleanAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::booleanAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void byteAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueInt(info, impl->byteAttribute());
 }
 
 static void byteAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::byteAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void byteAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "byteAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "byteAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(int, cppValue, toInt8(jsValue, exceptionState), exceptionState);
     impl->setByteAttribute(cppValue);
 }
 
 static void byteAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::byteAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void doubleAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValue(info, impl->doubleAttribute());
 }
 
 static void doubleAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::doubleAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void doubleAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_VOID(double, cppValue, static_cast<double>(jsValue->NumberValue()));
     impl->setDoubleAttribute(cppValue);
 }
 
 static void doubleAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::doubleAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void floatAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValue(info, impl->floatAttribute());
 }
 
 static void floatAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::floatAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void floatAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_VOID(float, cppValue, static_cast<float>(jsValue->NumberValue()));
     impl->setFloatAttribute(cppValue);
 }
 
 static void floatAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::floatAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void longAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueInt(info, impl->longAttribute());
 }
 
 static void longAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::longAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void longAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "longAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "longAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(int, cppValue, toInt32(jsValue, exceptionState), exceptionState);
     impl->setLongAttribute(cppValue);
 }
 
 static void longAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::longAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void longLongAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValue(info, static_cast<double>(impl->longLongAttribute()));
 }
 
 static void longLongAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::longLongAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void longLongAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "longLongAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "longLongAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(long long, cppValue, toInt64(jsValue, exceptionState), exceptionState);
     impl->setLongLongAttribute(cppValue);
 }
 
 static void longLongAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::longLongAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void octetAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueUnsigned(info, impl->octetAttribute());
 }
 
 static void octetAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::octetAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void octetAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "octetAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "octetAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(unsigned, cppValue, toUInt8(jsValue, exceptionState), exceptionState);
     impl->setOctetAttribute(cppValue);
 }
 
 static void octetAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::octetAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void shortAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueInt(info, impl->shortAttribute());
 }
 
 static void shortAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::shortAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void shortAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "shortAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "shortAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(int, cppValue, toInt16(jsValue, exceptionState), exceptionState);
     impl->setShortAttribute(cppValue);
 }
 
 static void shortAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::shortAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void unsignedLongAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueUnsigned(info, impl->unsignedLongAttribute());
 }
 
 static void unsignedLongAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::unsignedLongAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void unsignedLongAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "unsignedLongAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "unsignedLongAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(unsigned, cppValue, toUInt32(jsValue, exceptionState), exceptionState);
     impl->setUnsignedLongAttribute(cppValue);
 }
 
 static void unsignedLongAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::unsignedLongAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void unsignedLongLongAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValue(info, static_cast<double>(impl->unsignedLongLongAttribute()));
 }
 
 static void unsignedLongLongAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::unsignedLongLongAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void unsignedLongLongAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "unsignedLongLongAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "unsignedLongLongAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(unsigned long long, cppValue, toUInt64(jsValue, exceptionState), exceptionState);
     impl->setUnsignedLongLongAttribute(cppValue);
 }
 
 static void unsignedLongLongAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::unsignedLongLongAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void unsignedShortAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueUnsigned(info, impl->unsignedShortAttribute());
 }
 
 static void unsignedShortAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::unsignedShortAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void unsignedShortAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "unsignedShortAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "unsignedShortAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(unsigned, cppValue, toUInt16(jsValue, exceptionState), exceptionState);
     impl->setUnsignedShortAttribute(cppValue);
 }
 
 static void unsignedShortAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::unsignedShortAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void testInterfaceEmptyAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueFast(info, WTF::getPtr(impl->testInterfaceEmptyAttribute()), impl);
 }
 
 static void testInterfaceEmptyAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::testInterfaceEmptyAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void testInterfaceEmptyAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_VOID(TestInterfaceEmpty*, cppValue, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), jsValue));
     impl->setTestInterfaceEmptyAttribute(WTF::getPtr(cppValue));
 }
 
 static void testInterfaceEmptyAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::testInterfaceEmptyAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void testObjectPythonAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueFast(info, WTF::getPtr(impl->testObjectPythonAttribute()), impl);
 }
 
 static void testObjectPythonAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::testObjectPythonAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void testObjectPythonAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_VOID(TestObjectPython*, cppValue, V8TestObjectPython::toNativeWithTypeCheck(info.GetIsolate(), jsValue));
     impl->setTestObjectPythonAttribute(WTF::getPtr(cppValue));
 }
 
 static void testObjectPythonAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::testObjectPythonAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidCallbackFunctionAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(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");
     TestObjectPythonV8Internal::voidCallbackFunctionAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void voidCallbackFunctionAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_VOID(ScriptValue, cppValue, ScriptValue(jsValue, info.GetIsolate()));
     impl->setVoidCallbackFunctionAttribute(cppValue);
 }
 
 static void voidCallbackFunctionAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::voidCallbackFunctionAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void anyCallbackFunctionOptionalAnyArgAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(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");
     TestObjectPythonV8Internal::anyCallbackFunctionOptionalAnyArgAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void anyCallbackFunctionOptionalAnyArgAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_VOID(ScriptValue, cppValue, ScriptValue(jsValue, info.GetIsolate()));
     impl->setAnyCallbackFunctionOptionalAnyArgAttribute(cppValue);
 }
 
 static void anyCallbackFunctionOptionalAnyArgAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::anyCallbackFunctionOptionalAnyArgAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void cssAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueInt(info, impl->cssAttribute());
 }
 
 static void cssAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::cssAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void cssAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "cssAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "cssAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(int, cppValue, toInt32(jsValue, exceptionState), exceptionState);
     impl->setCSSAttribute(cppValue);
 }
 
 static void cssAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::cssAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void imeAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueInt(info, impl->imeAttribute());
 }
 
 static void imeAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::imeAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void imeAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "imeAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "imeAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(int, cppValue, toInt32(jsValue, exceptionState), exceptionState);
     impl->setIMEAttribute(cppValue);
 }
 
 static void imeAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::imeAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void svgAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueInt(info, impl->svgAttribute());
 }
 
 static void svgAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::svgAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void svgAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "svgAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "svgAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(int, cppValue, toInt32(jsValue, exceptionState), exceptionState);
     impl->setSVGAttribute(cppValue);
 }
 
 static void svgAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::svgAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void xmlAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueInt(info, impl->xmlAttribute());
 }
 
 static void xmlAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::xmlAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void xmlAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "xmlAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "xmlAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(int, cppValue, toInt32(jsValue, exceptionState), exceptionState);
     impl->setXMLAttribute(cppValue);
 }
 
 static void xmlAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::xmlAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void nodeFilterAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueFast(info, WTF::getPtr(impl->nodeFilterAttribute()), impl);
 }
 
 static void nodeFilterAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::nodeFilterAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void nodeFilterAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_VOID(RefPtr<NodeFilter>, cppValue, toNodeFilter(jsValue, info.GetIsolate()));
     impl->setNodeFilterAttribute(WTF::getPtr(cppValue));
 }
 
 static void nodeFilterAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::nodeFilterAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void serializedScriptValueAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValue(info, impl->serializedScriptValueAttribute() ? impl->serializedScriptValueAttribute()->deserialize() : v8::Handle<v8::Value>(v8::Null(info.GetIsolate())));
 }
 
 static void serializedScriptValueAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::serializedScriptValueAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void serializedScriptValueAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_VOID(RefPtr<SerializedScriptValue>, cppValue, SerializedScriptValue::create(jsValue, info.GetIsolate()));
     impl->setSerializedScriptValueAttribute(WTF::getPtr(cppValue));
 }
 
 static void serializedScriptValueAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::serializedScriptValueAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void anyAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValue(info, impl->anyAttribute().v8Value());
 }
 
 static void anyAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::anyAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void anyAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_VOID(ScriptValue, cppValue, ScriptValue(jsValue, info.GetIsolate()));
     impl->setAnyAttribute(cppValue);
 }
 
 static void anyAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::anyAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void promiseAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValue(info, impl->promiseAttribute().v8Value());
 }
 
 static void promiseAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::promiseAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void promiseAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_VOID(ScriptPromise, cppValue, ScriptPromise(jsValue, info.GetIsolate()));
     impl->setPromiseAttribute(cppValue);
 }
 
 static void promiseAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::promiseAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void windowAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueFast(info, WTF::getPtr(impl->windowAttribute()), impl);
 }
 
 static void windowAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::windowAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void windowAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_VOID(DOMWindow*, cppValue, toDOMWindow(jsValue, info.GetIsolate()));
     impl->setWindowAttribute(WTF::getPtr(cppValue));
 }
 
 static void windowAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::windowAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void documentAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(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");
     TestObjectPythonV8Internal::documentAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void documentAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_VOID(Document*, cppValue, V8Document::toNativeWithTypeCheck(info.GetIsolate(), jsValue));
     impl->setDocumentAttribute(WTF::getPtr(cppValue));
 }
 
 static void documentAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::documentAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void documentFragmentAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(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");
     TestObjectPythonV8Internal::documentFragmentAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void documentFragmentAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_VOID(DocumentFragment*, cppValue, V8DocumentFragment::toNativeWithTypeCheck(info.GetIsolate(), jsValue));
     impl->setDocumentFragmentAttribute(WTF::getPtr(cppValue));
 }
 
 static void documentFragmentAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::documentFragmentAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void documentTypeAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(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");
     TestObjectPythonV8Internal::documentTypeAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void documentTypeAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_VOID(DocumentType*, cppValue, V8DocumentType::toNativeWithTypeCheck(info.GetIsolate(), jsValue));
     impl->setDocumentTypeAttribute(WTF::getPtr(cppValue));
 }
 
 static void documentTypeAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::documentTypeAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void elementAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(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");
     TestObjectPythonV8Internal::elementAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void elementAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_VOID(Element*, cppValue, V8Element::toNativeWithTypeCheck(info.GetIsolate(), jsValue));
     impl->setElementAttribute(WTF::getPtr(cppValue));
 }
 
 static void elementAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::elementAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void nodeAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(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");
     TestObjectPythonV8Internal::nodeAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void nodeAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_VOID(Node*, cppValue, V8Node::toNativeWithTypeCheck(info.GetIsolate(), jsValue));
     impl->setNodeAttribute(WTF::getPtr(cppValue));
 }
 
 static void nodeAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::nodeAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void shadowRootAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(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");
     TestObjectPythonV8Internal::shadowRootAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void shadowRootAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_VOID(ShadowRoot*, cppValue, V8ShadowRoot::toNativeWithTypeCheck(info.GetIsolate(), jsValue));
     impl->setShadowRootAttribute(WTF::getPtr(cppValue));
 }
 
 static void shadowRootAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::shadowRootAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void arrayBufferAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(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");
     TestObjectPythonV8Internal::arrayBufferAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void arrayBufferAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_VOID(ArrayBuffer*, cppValue, jsValue->IsArrayBuffer() ? V8ArrayBuffer::toNative(v8::Handle<v8::ArrayBuffer>::Cast(jsValue)) : 0);
     impl->setArrayBufferAttribute(WTF::getPtr(cppValue));
 }
 
 static void arrayBufferAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::arrayBufferAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void float32ArrayAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(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");
     TestObjectPythonV8Internal::float32ArrayAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void float32ArrayAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_VOID(Float32Array*, cppValue, jsValue->IsFloat32Array() ? V8Float32Array::toNative(v8::Handle<v8::Float32Array>::Cast(jsValue)) : 0);
     impl->setFloat32ArrayAttribute(WTF::getPtr(cppValue));
 }
 
 static void float32ArrayAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::float32ArrayAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void uint8ArrayAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(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");
     TestObjectPythonV8Internal::uint8ArrayAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void uint8ArrayAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_VOID(Uint8Array*, cppValue, jsValue->IsUint8Array() ? V8Uint8Array::toNative(v8::Handle<v8::Uint8Array>::Cast(jsValue)) : 0);
     impl->setUint8ArrayAttribute(WTF::getPtr(cppValue));
 }
 
 static void uint8ArrayAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::uint8ArrayAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void selfAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueFast(info, WTF::getPtr(impl->self()), impl);
 }
 
 static void selfAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::selfAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void readonlyEventTargetAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueFast(info, WTF::getPtr(impl->readonlyEventTargetAttribute()), impl);
 }
 
 static void readonlyEventTargetAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::readonlyEventTargetAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void readonlyEventTargetOrNullAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     bool isNull = false;
     RefPtr<EventTarget> jsValue = impl->readonlyEventTargetOrNullAttribute(isNull);
     if (isNull) {
         v8SetReturnValueNull(info);
         return;
     }
     v8SetReturnValueFast(info, WTF::getPtr(jsValue.release()), impl);
 }
 
 static void readonlyEventTargetOrNullAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::readonlyEventTargetOrNullAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void readonlyWindowAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueFast(info, WTF::getPtr(impl->readonlyWindowAttribute()), impl);
 }
 
 static void readonlyWindowAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::readonlyWindowAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void htmlCollectionAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueFast(info, WTF::getPtr(impl->htmlCollectionAttribute()), impl);
 }
 
 static void htmlCollectionAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::htmlCollectionAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void htmlElementAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueFast(info, WTF::getPtr(impl->htmlElementAttribute()), impl);
 }
 
 static void htmlElementAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::htmlElementAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void stringArrayAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValue(info, v8Array(impl->stringArrayAttribute(), info.GetIsolate()));
 }
 
 static void stringArrayAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::stringArrayAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void stringArrayAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_VOID(Vector<String>, cppValue, toNativeArray<String>(jsValue, 0, info.GetIsolate()));
     impl->setStringArrayAttribute(cppValue);
 }
 
 static void stringArrayAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::stringArrayAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void testInterfaceEmptyArrayAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValue(info, v8Array(impl->testInterfaceEmptyArrayAttribute(), info.GetIsolate()));
 }
 
 static void testInterfaceEmptyArrayAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::testInterfaceEmptyArrayAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void testInterfaceEmptyArrayAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_VOID(Vector<RefPtr<TestInterfaceEmpty> >, cppValue, (toRefPtrNativeArray<TestInterfaceEmpty, V8TestInterfaceEmpty>(jsValue, 0, info.GetIsolate())));
     impl->setTestInterfaceEmptyArrayAttribute(cppValue);
 }
 
 static void testInterfaceEmptyArrayAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::testInterfaceEmptyArrayAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void floatArrayAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValue(info, v8Array(impl->floatArrayAttribute(), info.GetIsolate()));
 }
 
 static void floatArrayAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::floatArrayAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void floatArrayAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_VOID(Vector<float>, cppValue, toNativeArray<float>(jsValue, 0, info.GetIsolate()));
     impl->setFloatArrayAttribute(cppValue);
 }
 
 static void floatArrayAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::floatArrayAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void stringOrNullAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     bool isNull = false;
     String jsValue = impl->stringOrNullAttribute(isNull);
     if (isNull) {
         v8SetReturnValueNull(info);
         return;
     }
     v8SetReturnValueString(info, jsValue, info.GetIsolate());
 }
 
 static void stringOrNullAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::stringOrNullAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void stringOrNullAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, cppValue, jsValue);
     impl->setStringOrNullAttribute(cppValue);
 }
 
 static void stringOrNullAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::stringOrNullAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void longOrNullAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     bool isNull = false;
     int jsValue = impl->longOrNullAttribute(isNull);
     if (isNull) {
         v8SetReturnValueNull(info);
         return;
     }
     v8SetReturnValueInt(info, jsValue);
 }
 
 static void longOrNullAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::longOrNullAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void longOrNullAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "longOrNullAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "longOrNullAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(int, cppValue, toInt32(jsValue, exceptionState), exceptionState);
     impl->setLongOrNullAttribute(cppValue);
 }
 
 static void longOrNullAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::longOrNullAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void testInterfaceOrNullAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     bool isNull = false;
     RefPtr<TestInterface> jsValue = impl->testInterfaceOrNullAttribute(isNull);
     if (isNull) {
         v8SetReturnValueNull(info);
         return;
     }
     v8SetReturnValueFast(info, WTF::getPtr(jsValue.release()), impl);
 }
 
 static void testInterfaceOrNullAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::testInterfaceOrNullAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void testInterfaceOrNullAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_VOID(TestInterface*, cppValue, V8TestInterface::toNativeWithTypeCheck(info.GetIsolate(), jsValue));
     impl->setTestInterfaceOrNullAttribute(WTF::getPtr(cppValue));
 }
 
 static void testInterfaceOrNullAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::testInterfaceOrNullAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void testEnumAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueString(info, impl->testEnumAttribute(), info.GetIsolate());
 }
 
 static void testEnumAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::testEnumAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void testEnumAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, cppValue, jsValue);
     String string = cppValue;
     if (!(string == "" || string == "EnumValue1" || string == "EnumValue2" || string == "EnumValue3"))
         return;
     impl->setTestEnumAttribute(cppValue);
 }
 
 static void testEnumAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
@@ skipping 33 matching lines @@
 
 static void staticLongAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::staticLongAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void staticLongAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "staticLongAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
+    ExceptionState exceptionState(ExceptionState::SetterContext, "staticLongAttribute", "TestObjectPython", holder, info.GetIsolate());
     V8TRYCATCH_EXCEPTION_VOID(int, cppValue, toInt32(jsValue, exceptionState), exceptionState);
     TestObjectPython::setStaticLongAttribute(cppValue);
 }
 
 static void staticLongAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::staticLongAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void eventHandlerAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     EventListener* jsValue = impl->eventHandlerAttribute();
     v8SetReturnValue(info, jsValue ? v8::Handle<v8::Value>(V8AbstractEventListener::cast(jsValue)->getListenerObject(impl->executionContext())) : v8::Handle<v8::Value>(v8::Null(info.GetIsolate())));
 }
 
 static void eventHandlerAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::eventHandlerAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void eventHandlerAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
-    moveEventListenerToNewWrapper(info.Holder(), impl->eventHandlerAttribute(), jsValue, V8TestObjectPython::eventListenerCacheIndex, info.GetIsolate());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
+    moveEventListenerToNewWrapper(holder, impl->eventHandlerAttribute(), jsValue, V8TestObjectPython::eventListenerCacheIndex, info.GetIsolate());
     impl->setEventHandlerAttribute(V8EventListenerList::getEventListener(jsValue, true, ListenerFindOrCreate));
 }
 
 static void eventHandlerAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::eventHandlerAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void activityLoggingAccessForAllWorldsLongAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueInt(info, impl->activityLoggingAccessForAllWorldsLongAttribute());
 }
 
 static void activityLoggingAccessForAllWorldsLongAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     V8PerContextData* contextData = V8PerContextData::from(info.GetIsolate()->GetCurrentContext());
     if (contextData && contextData->activityLogger())
         contextData->activityLogger()->log("TestObjectPython.activityLoggingAccessForAllWorldsLongAttribute", 0, 0, "Getter");
     TestObjectPythonV8Internal::activityLoggingAccessForAllWorldsLongAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void activityLoggingAccessForAllWorldsLongAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "activityLoggingAccessForAllWorldsLongAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "activityLoggingAccessForAllWorldsLongAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(int, cppValue, toInt32(jsValue, exceptionState), exceptionState);
     impl->setActivityLoggingAccessForAllWorldsLongAttribute(cppValue);
 }
 
 static void activityLoggingAccessForAllWorldsLongAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     V8PerContextData* contextData = V8PerContextData::from(info.GetIsolate()->GetCurrentContext());
     if (contextData && contextData->activityLogger()) {
         v8::Handle<v8::Value> loggerArg[] = { jsValue };
         contextData->activityLogger()->log("TestObjectPython.activityLoggingAccessForAllWorldsLongAttribute", 1, &loggerArg[0], "Setter");
     }
     TestObjectPythonV8Internal::activityLoggingAccessForAllWorldsLongAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void activityLoggingGetterForAllWorldsLongAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueInt(info, impl->activityLoggingGetterForAllWorldsLongAttribute());
 }
 
 static void activityLoggingGetterForAllWorldsLongAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     V8PerContextData* contextData = V8PerContextData::from(info.GetIsolate()->GetCurrentContext());
     if (contextData && contextData->activityLogger())
         contextData->activityLogger()->log("TestObjectPython.activityLoggingGetterForAllWorldsLongAttribute", 0, 0, "Getter");
     TestObjectPythonV8Internal::activityLoggingGetterForAllWorldsLongAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void activityLoggingGetterForAllWorldsLongAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "activityLoggingGetterForAllWorldsLongAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "activityLoggingGetterForAllWorldsLongAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(int, cppValue, toInt32(jsValue, exceptionState), exceptionState);
     impl->setActivityLoggingGetterForAllWorldsLongAttribute(cppValue);
 }
 
 static void activityLoggingGetterForAllWorldsLongAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::activityLoggingGetterForAllWorldsLongAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void activityLoggingSetterForAllWorldsLongAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueInt(info, impl->activityLoggingSetterForAllWorldsLongAttribute());
 }
 
 static void activityLoggingSetterForAllWorldsLongAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::activityLoggingSetterForAllWorldsLongAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void activityLoggingSetterForAllWorldsLongAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "activityLoggingSetterForAllWorldsLongAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "activityLoggingSetterForAllWorldsLongAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(int, cppValue, toInt32(jsValue, exceptionState), exceptionState);
     impl->setActivityLoggingSetterForAllWorldsLongAttribute(cppValue);
 }
 
 static void activityLoggingSetterForAllWorldsLongAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     V8PerContextData* contextData = V8PerContextData::from(info.GetIsolate()->GetCurrentContext());
     if (contextData && contextData->activityLogger()) {
         v8::Handle<v8::Value> loggerArg[] = { jsValue };
         contextData->activityLogger()->log("TestObjectPython.activityLoggingSetterForAllWorldsLongAttribute", 1, &loggerArg[0], "Setter");
     }
     TestObjectPythonV8Internal::activityLoggingSetterForAllWorldsLongAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void cachedAttributeAnyAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
+    v8::Handle<v8::Object> holder = info.Holder();
     v8::Handle<v8::String> propertyName = v8AtomicString(info.GetIsolate(), "cachedAttributeAnyAttribute");
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     if (!impl->isValueDirty()) {
-        v8::Handle<v8::Value> jsValue = V8HiddenValue::getHiddenValue(info.GetIsolate(), info.Holder(), propertyName);
+        v8::Handle<v8::Value> jsValue = V8HiddenValue::getHiddenValue(info.GetIsolate(), holder, propertyName);
         if (!jsValue.IsEmpty()) {
             v8SetReturnValue(info, jsValue);
             return;
         }
     }
     ScriptValue jsValue = impl->cachedAttributeAnyAttribute();
-    V8HiddenValue::setHiddenValue(info.GetIsolate(), info.Holder(), propertyName, jsValue.v8Value());
+    V8HiddenValue::setHiddenValue(info.GetIsolate(), holder, propertyName, jsValue.v8Value());
     v8SetReturnValue(info, jsValue.v8Value());
 }
 
 static void cachedAttributeAnyAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::cachedAttributeAnyAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void cachedAttributeAnyAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_VOID(ScriptValue, cppValue, ScriptValue(jsValue, info.GetIsolate()));
     impl->setCachedAttributeAnyAttribute(cppValue);
-    V8HiddenValue::deleteHiddenValue(info.GetIsolate(), info.Holder(), v8AtomicString(info.GetIsolate(), "cachedAttributeAnyAttribute")); // Invalidate the cached value.
+    V8HiddenValue::deleteHiddenValue(info.GetIsolate(), holder, v8AtomicString(info.GetIsolate(), "cachedAttributeAnyAttribute")); // Invalidate the cached value.
 }
 
 static void cachedAttributeAnyAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::cachedAttributeAnyAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void callWithExecutionContextAnyAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     ExecutionContext* scriptContext = currentExecutionContext(info.GetIsolate());
     v8SetReturnValue(info, impl->callWithExecutionContextAnyAttribute(scriptContext).v8Value());
 }
 
 static void callWithExecutionContextAnyAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::callWithExecutionContextAnyAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void callWithExecutionContextAnyAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_VOID(ScriptValue, cppValue, ScriptValue(jsValue, info.GetIsolate()));
     ExecutionContext* scriptContext = currentExecutionContext(info.GetIsolate());
     impl->setCallWithExecutionContextAnyAttribute(scriptContext, cppValue);
 }
 
 static void callWithExecutionContextAnyAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::callWithExecutionContextAnyAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void checkSecurityForNodeReadonlyDocumentAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
-    ExceptionState exceptionState(ExceptionState::GetterContext, "checkSecurityForNodeReadonlyDocumentAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
+    ExceptionState exceptionState(ExceptionState::GetterContext, "checkSecurityForNodeReadonlyDocumentAttribute", "TestObjectPython", holder, info.GetIsolate());
     if (!BindingSecurity::shouldAllowAccessToNode(info.GetIsolate(), impl->checkSecurityForNodeReadonlyDocumentAttribute(), exceptionState)) {
         v8SetReturnValueNull(info);
         exceptionState.throwIfNeeded();
         return;
     }
     v8SetReturnValueFast(info, WTF::getPtr(impl->checkSecurityForNodeReadonlyDocumentAttribute()), impl);
 }
 
 static void checkSecurityForNodeReadonlyDocumentAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::checkSecurityForNodeReadonlyDocumentAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 #if ENABLE(CONDITION)
 static void conditionalLongAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueInt(info, impl->conditionalLongAttribute());
 }
 #endif // ENABLE(CONDITION)
 
 #if ENABLE(CONDITION)
 static void conditionalLongAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::conditionalLongAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 #endif // ENABLE(CONDITION)
 
 #if ENABLE(CONDITION)
 static void conditionalLongAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "conditionalLongAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "conditionalLongAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(int, cppValue, toInt32(jsValue, exceptionState), exceptionState);
     impl->setConditionalLongAttribute(cppValue);
 }
 #endif // ENABLE(CONDITION)
 
 #if ENABLE(CONDITION)
 static void conditionalLongAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::conditionalLongAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 #endif // ENABLE(CONDITION)
 
 #if ENABLE(CONDITION_1) && ENABLE(CONDITION_2)
 static void conditionalAndLongAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueInt(info, impl->conditionalAndLongAttribute());
 }
 #endif // ENABLE(CONDITION_1) && ENABLE(CONDITION_2)
 
 #if ENABLE(CONDITION_1) && ENABLE(CONDITION_2)
 static void conditionalAndLongAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::conditionalAndLongAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 #endif // ENABLE(CONDITION_1) && ENABLE(CONDITION_2)
 
 #if ENABLE(CONDITION_1) && ENABLE(CONDITION_2)
 static void conditionalAndLongAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "conditionalAndLongAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "conditionalAndLongAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(int, cppValue, toInt32(jsValue, exceptionState), exceptionState);
     impl->setConditionalAndLongAttribute(cppValue);
 }
 #endif // ENABLE(CONDITION_1) && ENABLE(CONDITION_2)
 
 #if ENABLE(CONDITION_1) && ENABLE(CONDITION_2)
 static void conditionalAndLongAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::conditionalAndLongAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 #endif // ENABLE(CONDITION_1) && ENABLE(CONDITION_2)
 
 #if ENABLE(CONDITION_1) || ENABLE(CONDITION_2)
 static void conditionalOrLongAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueInt(info, impl->conditionalOrLongAttribute());
 }
 #endif // ENABLE(CONDITION_1) || ENABLE(CONDITION_2)
 
 #if ENABLE(CONDITION_1) || ENABLE(CONDITION_2)
 static void conditionalOrLongAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::conditionalOrLongAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 #endif // ENABLE(CONDITION_1) || ENABLE(CONDITION_2)
 
 #if ENABLE(CONDITION_1) || ENABLE(CONDITION_2)
 static void conditionalOrLongAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "conditionalOrLongAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "conditionalOrLongAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(int, cppValue, toInt32(jsValue, exceptionState), exceptionState);
     impl->setConditionalOrLongAttribute(cppValue);
 }
 #endif // ENABLE(CONDITION_1) || ENABLE(CONDITION_2)
 
 #if ENABLE(CONDITION_1) || ENABLE(CONDITION_2)
 static void conditionalOrLongAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::conditionalOrLongAttributeAttributeSetter(jsValue, info);
@@ skipping 17 matching lines @@
 
 static void customGetterLongAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     V8TestObjectPython::customGetterLongAttributeAttributeGetterCustom(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void customGetterLongAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "customGetterLongAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "customGetterLongAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(int, cppValue, toInt32(jsValue, exceptionState), exceptionState);
     impl->setCustomGetterLongAttribute(cppValue);
 }
 
 static void customGetterLongAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::customGetterLongAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void customGetterReadonlyObjectAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     V8TestObjectPython::customGetterReadonlyObjectAttributeAttributeGetterCustom(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void customSetterLongAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueInt(info, impl->customSetterLongAttribute());
 }
 
 static void customSetterLongAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::customSetterLongAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
@@ skipping 17 matching lines @@
 static void customLongAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     V8TestObjectPython::customLongAttributeAttributeSetterCustom(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 #endif // ENABLE(CONDITION)
 
 static void customElementsCallbacksReadonlyLongAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueInt(info, impl->customElementsCallbacksReadonlyLongAttribute());
 }
 
 static void customElementsCallbacksReadonlyLongAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::customElementsCallbacksReadonlyLongAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void deprecatedLongAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueInt(info, impl->deprecatedLongAttribute());
 }
 
 static void deprecatedLongAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     UseCounter::countDeprecation(callingExecutionContext(info.GetIsolate()), UseCounter::LongAttribute);
     TestObjectPythonV8Internal::deprecatedLongAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void deprecatedLongAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "deprecatedLongAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "deprecatedLongAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(int, cppValue, toInt32(jsValue, exceptionState), exceptionState);
     impl->setDeprecatedLongAttribute(cppValue);
 }
 
 static void deprecatedLongAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     UseCounter::countDeprecation(callingExecutionContext(info.GetIsolate()), UseCounter::LongAttribute);
     TestObjectPythonV8Internal::deprecatedLongAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void enforceRangeLongAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueInt(info, impl->enforceRangeLongAttribute());
 }
 
 static void enforceRangeLongAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::enforceRangeLongAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void enforceRangeLongAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "enforceRangeLongAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "enforceRangeLongAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(int, cppValue, toInt32(jsValue, EnforceRange, exceptionState), exceptionState);
     impl->setEnforceRangeLongAttribute(cppValue);
 }
 
 static void enforceRangeLongAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::enforceRangeLongAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void exposeJSAccessorsLongAttributeAttributeGetter(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueInt(info, impl->exposeJSAccessorsLongAttribute());
 }
 
 static void exposeJSAccessorsLongAttributeAttributeGetterCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::exposeJSAccessorsLongAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void exposeJSAccessorsLongAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::FunctionCallbackInfo<v8::Value>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "exposeJSAccessorsLongAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "exposeJSAccessorsLongAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(int, cppValue, toInt32(jsValue, exceptionState), exceptionState);
     impl->setExposeJSAccessorsLongAttribute(cppValue);
 }
 
 static void exposeJSAccessorsLongAttributeAttributeSetterCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     v8::Local<v8::Value> jsValue = info[0];
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::exposeJSAccessorsLongAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void implementedAsLongAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueInt(info, impl->implementedAsName());
 }
 
 static void implementedAsLongAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::implementedAsLongAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void implementedAsLongAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "implementedAsLongAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "implementedAsLongAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(int, cppValue, toInt32(jsValue, exceptionState), exceptionState);
     impl->setImplementedAsName(cppValue);
 }
 
 static void implementedAsLongAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::implementedAsLongAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
@@ skipping 14 matching lines @@
 
 static void customGetterImplementedAsLongAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     V8TestObjectPython::customGetterImplementedAsLongAttributeAttributeGetterCustom(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void customGetterImplementedAsLongAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "customGetterImplementedAsLongAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "customGetterImplementedAsLongAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(int, cppValue, toInt32(jsValue, exceptionState), exceptionState);
     impl->setImplementedAsNameWithCustomGetter(cppValue);
 }
 
 static void customGetterImplementedAsLongAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::customGetterImplementedAsLongAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void customSetterImplementedAsLongAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueInt(info, impl->implementedAsNameWithCustomGetter());
 }
 
 static void customSetterImplementedAsLongAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::customSetterImplementedAsLongAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void customSetterImplementedAsLongAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     V8TestObjectPython::customSetterImplementedAsLongAttributeAttributeSetterCustom(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void measureAsLongAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueInt(info, impl->measureAsLongAttribute());
 }
 
 static void measureAsLongAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     UseCounter::count(callingExecutionContext(info.GetIsolate()), UseCounter::TestFeature);
     TestObjectPythonV8Internal::measureAsLongAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void measureAsLongAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "measureAsLongAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "measureAsLongAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(int, cppValue, toInt32(jsValue, exceptionState), exceptionState);
     impl->setMeasureAsLongAttribute(cppValue);
 }
 
 static void measureAsLongAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     UseCounter::count(callingExecutionContext(info.GetIsolate()), UseCounter::TestFeature);
     TestObjectPythonV8Internal::measureAsLongAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void notEnumerableLongAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueInt(info, impl->notEnumerableLongAttribute());
 }
 
 static void notEnumerableLongAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::notEnumerableLongAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void notEnumerableLongAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "notEnumerableLongAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "notEnumerableLongAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(int, cppValue, toInt32(jsValue, exceptionState), exceptionState);
     impl->setNotEnumerableLongAttribute(cppValue);
 }
 
 static void notEnumerableLongAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::notEnumerableLongAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void perContextEnabledLongAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueInt(info, impl->perContextEnabledLongAttribute());
 }
 
 static void perContextEnabledLongAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::perContextEnabledLongAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void perContextEnabledLongAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "perContextEnabledLongAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "perContextEnabledLongAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(int, cppValue, toInt32(jsValue, exceptionState), exceptionState);
     impl->setPerContextEnabledLongAttribute(cppValue);
 }
 
 static void perContextEnabledLongAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::perContextEnabledLongAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void perWorldBindingsLongAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueInt(info, impl->perWorldBindingsLongAttribute());
 }
 
 static void perWorldBindingsLongAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::perWorldBindingsLongAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void perWorldBindingsLongAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "perWorldBindingsLongAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "perWorldBindingsLongAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(int, cppValue, toInt32(jsValue, exceptionState), exceptionState);
     impl->setPerWorldBindingsLongAttribute(cppValue);
 }
 
 static void perWorldBindingsLongAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::perWorldBindingsLongAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void perWorldBindingsLongAttributeAttributeGetterForMainWorld(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueInt(info, impl->perWorldBindingsLongAttribute());
 }
 
 static void perWorldBindingsLongAttributeAttributeGetterCallbackForMainWorld(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::perWorldBindingsLongAttributeAttributeGetterForMainWorld(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void perWorldBindingsLongAttributeAttributeSetterForMainWorld(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "perWorldBindingsLongAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "perWorldBindingsLongAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(int, cppValue, toInt32(jsValue, exceptionState), exceptionState);
     impl->setPerWorldBindingsLongAttribute(cppValue);
 }
 
 static void perWorldBindingsLongAttributeAttributeSetterCallbackForMainWorld(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::perWorldBindingsLongAttributeAttributeSetterForMainWorld(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void perWorldBindingsReadonlyLongAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueInt(info, impl->perWorldBindingsReadonlyLongAttribute());
 }
 
 static void perWorldBindingsReadonlyLongAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::perWorldBindingsReadonlyLongAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void perWorldBindingsReadonlyLongAttributeAttributeGetterForMainWorld(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueInt(info, impl->perWorldBindingsReadonlyLongAttribute());
 }
 
 static void perWorldBindingsReadonlyLongAttributeAttributeGetterCallbackForMainWorld(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::perWorldBindingsReadonlyLongAttributeAttributeGetterForMainWorld(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void perWorldBindingsReadonlyTestInterfaceEmptyAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     RefPtr<TestInterfaceEmpty> result(impl->perWorldBindingsReadonlyTestInterfaceEmptyAttribute());
     if (result && DOMDataStore::setReturnValueFromWrapper<V8TestInterfaceEmpty>(info.GetReturnValue(), result.get()))
         return;
-    v8::Handle<v8::Value> wrapper = toV8(result.get(), info.Holder(), info.GetIsolate());
+    v8::Handle<v8::Value> wrapper = toV8(result.get(), holder, info.GetIsolate());
     if (!wrapper.IsEmpty()) {
-        V8HiddenValue::setHiddenValue(info.GetIsolate(), info.Holder(), v8AtomicString(info.GetIsolate(), "perWorldBindingsReadonlyTestInterfaceEmptyAttribute"), wrapper);
+        V8HiddenValue::setHiddenValue(info.GetIsolate(), holder, v8AtomicString(info.GetIsolate(), "perWorldBindingsReadonlyTestInterfaceEmptyAttribute"), wrapper);
         v8SetReturnValue(info, wrapper);
     }
 }
 
 static void perWorldBindingsReadonlyTestInterfaceEmptyAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::perWorldBindingsReadonlyTestInterfaceEmptyAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void perWorldBindingsReadonlyTestInterfaceEmptyAttributeAttributeGetterForMainWorld(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     RefPtr<TestInterfaceEmpty> result(impl->perWorldBindingsReadonlyTestInterfaceEmptyAttribute());
     if (result && DOMDataStore::setReturnValueFromWrapperForMainWorld<V8TestInterfaceEmpty>(info.GetReturnValue(), result.get()))
         return;
-    v8::Handle<v8::Value> wrapper = toV8(result.get(), info.Holder(), info.GetIsolate());
+    v8::Handle<v8::Value> wrapper = toV8(result.get(), holder, info.GetIsolate());
     if (!wrapper.IsEmpty()) {
-        V8HiddenValue::setHiddenValue(info.GetIsolate(), info.Holder(), v8AtomicString(info.GetIsolate(), "perWorldBindingsReadonlyTestInterfaceEmptyAttribute"), wrapper);
+        V8HiddenValue::setHiddenValue(info.GetIsolate(), holder, v8AtomicString(info.GetIsolate(), "perWorldBindingsReadonlyTestInterfaceEmptyAttribute"), wrapper);
         v8SetReturnValue(info, wrapper);
     }
 }
 
 static void perWorldBindingsReadonlyTestInterfaceEmptyAttributeAttributeGetterCallbackForMainWorld(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::perWorldBindingsReadonlyTestInterfaceEmptyAttributeAttributeGetterForMainWorld(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void activityLoggingAccessPerWorldBindingsLongAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueInt(info, impl->activityLoggingAccessPerWorldBindingsLongAttribute());
 }
 
 static void activityLoggingAccessPerWorldBindingsLongAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     V8PerContextData* contextData = V8PerContextData::from(info.GetIsolate()->GetCurrentContext());
     if (contextData && contextData->activityLogger())
         contextData->activityLogger()->log("TestObjectPython.activityLoggingAccessPerWorldBindingsLongAttribute", 0, 0, "Getter");
     TestObjectPythonV8Internal::activityLoggingAccessPerWorldBindingsLongAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void activityLoggingAccessPerWorldBindingsLongAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "activityLoggingAccessPerWorldBindingsLongAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "activityLoggingAccessPerWorldBindingsLongAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(int, cppValue, toInt32(jsValue, exceptionState), exceptionState);
     impl->setActivityLoggingAccessPerWorldBindingsLongAttribute(cppValue);
 }
 
 static void activityLoggingAccessPerWorldBindingsLongAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     V8PerContextData* contextData = V8PerContextData::from(info.GetIsolate()->GetCurrentContext());
     if (contextData && contextData->activityLogger()) {
         v8::Handle<v8::Value> loggerArg[] = { jsValue };
         contextData->activityLogger()->log("TestObjectPython.activityLoggingAccessPerWorldBindingsLongAttribute", 1, &loggerArg[0], "Setter");
     }
     TestObjectPythonV8Internal::activityLoggingAccessPerWorldBindingsLongAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void activityLoggingAccessPerWorldBindingsLongAttributeAttributeGetterForMainWorld(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueInt(info, impl->activityLoggingAccessPerWorldBindingsLongAttribute());
 }
 
 static void activityLoggingAccessPerWorldBindingsLongAttributeAttributeGetterCallbackForMainWorld(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     V8PerContextData* contextData = V8PerContextData::from(info.GetIsolate()->GetCurrentContext());
     if (contextData && contextData->activityLogger())
         contextData->activityLogger()->log("TestObjectPython.activityLoggingAccessPerWorldBindingsLongAttribute", 0, 0, "Getter");
     TestObjectPythonV8Internal::activityLoggingAccessPerWorldBindingsLongAttributeAttributeGetterForMainWorld(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void activityLoggingAccessPerWorldBindingsLongAttributeAttributeSetterForMainWorld(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "activityLoggingAccessPerWorldBindingsLongAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "activityLoggingAccessPerWorldBindingsLongAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(int, cppValue, toInt32(jsValue, exceptionState), exceptionState);
     impl->setActivityLoggingAccessPerWorldBindingsLongAttribute(cppValue);
 }
 
 static void activityLoggingAccessPerWorldBindingsLongAttributeAttributeSetterCallbackForMainWorld(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     V8PerContextData* contextData = V8PerContextData::from(info.GetIsolate()->GetCurrentContext());
     if (contextData && contextData->activityLogger()) {
         v8::Handle<v8::Value> loggerArg[] = { jsValue };
         contextData->activityLogger()->log("TestObjectPython.activityLoggingAccessPerWorldBindingsLongAttribute", 1, &loggerArg[0], "Setter");
     }
     TestObjectPythonV8Internal::activityLoggingAccessPerWorldBindingsLongAttributeAttributeSetterForMainWorld(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void activityLoggingAccessForIsolatedWorldsPerWorldBindingsLongAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueInt(info, impl->activityLoggingAccessForIsolatedWorldsPerWorldBindingsLongAttribute());
 }
 
 static void activityLoggingAccessForIsolatedWorldsPerWorldBindingsLongAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     V8PerContextData* contextData = V8PerContextData::from(info.GetIsolate()->GetCurrentContext());
     if (contextData && contextData->activityLogger())
         contextData->activityLogger()->log("TestObjectPython.activityLoggingAccessForIsolatedWorldsPerWorldBindingsLongAttribute", 0, 0, "Getter");
     TestObjectPythonV8Internal::activityLoggingAccessForIsolatedWorldsPerWorldBindingsLongAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void activityLoggingAccessForIsolatedWorldsPerWorldBindingsLongAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "activityLoggingAccessForIsolatedWorldsPerWorldBindingsLongAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "activityLoggingAccessForIsolatedWorldsPerWorldBindingsLongAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(int, cppValue, toInt32(jsValue, exceptionState), exceptionState);
     impl->setActivityLoggingAccessForIsolatedWorldsPerWorldBindingsLongAttribute(cppValue);
 }
 
 static void activityLoggingAccessForIsolatedWorldsPerWorldBindingsLongAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     V8PerContextData* contextData = V8PerContextData::from(info.GetIsolate()->GetCurrentContext());
     if (contextData && contextData->activityLogger()) {
         v8::Handle<v8::Value> loggerArg[] = { jsValue };
         contextData->activityLogger()->log("TestObjectPython.activityLoggingAccessForIsolatedWorldsPerWorldBindingsLongAttribute", 1, &loggerArg[0], "Setter");
     }
     TestObjectPythonV8Internal::activityLoggingAccessForIsolatedWorldsPerWorldBindingsLongAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void activityLoggingAccessForIsolatedWorldsPerWorldBindingsLongAttributeAttributeGetterForMainWorld(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueInt(info, impl->activityLoggingAccessForIsolatedWorldsPerWorldBindingsLongAttribute());
 }
 
 static void activityLoggingAccessForIsolatedWorldsPerWorldBindingsLongAttributeAttributeGetterCallbackForMainWorld(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::activityLoggingAccessForIsolatedWorldsPerWorldBindingsLongAttributeAttributeGetterForMainWorld(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void activityLoggingAccessForIsolatedWorldsPerWorldBindingsLongAttributeAttributeSetterForMainWorld(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "activityLoggingAccessForIsolatedWorldsPerWorldBindingsLongAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "activityLoggingAccessForIsolatedWorldsPerWorldBindingsLongAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(int, cppValue, toInt32(jsValue, exceptionState), exceptionState);
     impl->setActivityLoggingAccessForIsolatedWorldsPerWorldBindingsLongAttribute(cppValue);
 }
 
 static void activityLoggingAccessForIsolatedWorldsPerWorldBindingsLongAttributeAttributeSetterCallbackForMainWorld(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::activityLoggingAccessForIsolatedWorldsPerWorldBindingsLongAttributeAttributeSetterForMainWorld(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void activityLoggingGetterPerWorldBindingsLongAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueInt(info, impl->activityLoggingGetterPerWorldBindingsLongAttribute());
 }
 
 static void activityLoggingGetterPerWorldBindingsLongAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     V8PerContextData* contextData = V8PerContextData::from(info.GetIsolate()->GetCurrentContext());
     if (contextData && contextData->activityLogger())
         contextData->activityLogger()->log("TestObjectPython.activityLoggingGetterPerWorldBindingsLongAttribute", 0, 0, "Getter");
     TestObjectPythonV8Internal::activityLoggingGetterPerWorldBindingsLongAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void activityLoggingGetterPerWorldBindingsLongAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "activityLoggingGetterPerWorldBindingsLongAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "activityLoggingGetterPerWorldBindingsLongAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(int, cppValue, toInt32(jsValue, exceptionState), exceptionState);
     impl->setActivityLoggingGetterPerWorldBindingsLongAttribute(cppValue);
 }
 
 static void activityLoggingGetterPerWorldBindingsLongAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::activityLoggingGetterPerWorldBindingsLongAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void activityLoggingGetterPerWorldBindingsLongAttributeAttributeGetterForMainWorld(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueInt(info, impl->activityLoggingGetterPerWorldBindingsLongAttribute());
 }
 
 static void activityLoggingGetterPerWorldBindingsLongAttributeAttributeGetterCallbackForMainWorld(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     V8PerContextData* contextData = V8PerContextData::from(info.GetIsolate()->GetCurrentContext());
     if (contextData && contextData->activityLogger())
         contextData->activityLogger()->log("TestObjectPython.activityLoggingGetterPerWorldBindingsLongAttribute", 0, 0, "Getter");
     TestObjectPythonV8Internal::activityLoggingGetterPerWorldBindingsLongAttributeAttributeGetterForMainWorld(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void activityLoggingGetterPerWorldBindingsLongAttributeAttributeSetterForMainWorld(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "activityLoggingGetterPerWorldBindingsLongAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "activityLoggingGetterPerWorldBindingsLongAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(int, cppValue, toInt32(jsValue, exceptionState), exceptionState);
     impl->setActivityLoggingGetterPerWorldBindingsLongAttribute(cppValue);
 }
 
 static void activityLoggingGetterPerWorldBindingsLongAttributeAttributeSetterCallbackForMainWorld(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::activityLoggingGetterPerWorldBindingsLongAttributeAttributeSetterForMainWorld(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void activityLoggingGetterForIsolatedWorldsPerWorldBindingsLongAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueInt(info, impl->activityLoggingGetterForIsolatedWorldsPerWorldBindingsLongAttribute());
 }
 
 static void activityLoggingGetterForIsolatedWorldsPerWorldBindingsLongAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     V8PerContextData* contextData = V8PerContextData::from(info.GetIsolate()->GetCurrentContext());
     if (contextData && contextData->activityLogger())
         contextData->activityLogger()->log("TestObjectPython.activityLoggingGetterForIsolatedWorldsPerWorldBindingsLongAttribute", 0, 0, "Getter");
     TestObjectPythonV8Internal::activityLoggingGetterForIsolatedWorldsPerWorldBindingsLongAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void activityLoggingGetterForIsolatedWorldsPerWorldBindingsLongAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "activityLoggingGetterForIsolatedWorldsPerWorldBindingsLongAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "activityLoggingGetterForIsolatedWorldsPerWorldBindingsLongAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(int, cppValue, toInt32(jsValue, exceptionState), exceptionState);
     impl->setActivityLoggingGetterForIsolatedWorldsPerWorldBindingsLongAttribute(cppValue);
 }
 
 static void activityLoggingGetterForIsolatedWorldsPerWorldBindingsLongAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::activityLoggingGetterForIsolatedWorldsPerWorldBindingsLongAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void activityLoggingGetterForIsolatedWorldsPerWorldBindingsLongAttributeAttributeGetterForMainWorld(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueInt(info, impl->activityLoggingGetterForIsolatedWorldsPerWorldBindingsLongAttribute());
 }
 
 static void activityLoggingGetterForIsolatedWorldsPerWorldBindingsLongAttributeAttributeGetterCallbackForMainWorld(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::activityLoggingGetterForIsolatedWorldsPerWorldBindingsLongAttributeAttributeGetterForMainWorld(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void activityLoggingGetterForIsolatedWorldsPerWorldBindingsLongAttributeAttributeSetterForMainWorld(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "activityLoggingGetterForIsolatedWorldsPerWorldBindingsLongAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "activityLoggingGetterForIsolatedWorldsPerWorldBindingsLongAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(int, cppValue, toInt32(jsValue, exceptionState), exceptionState);
     impl->setActivityLoggingGetterForIsolatedWorldsPerWorldBindingsLongAttribute(cppValue);
 }
 
 static void activityLoggingGetterForIsolatedWorldsPerWorldBindingsLongAttributeAttributeSetterCallbackForMainWorld(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::activityLoggingGetterForIsolatedWorldsPerWorldBindingsLongAttributeAttributeSetterForMainWorld(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void locationAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueFast(info, WTF::getPtr(impl->location()), impl);
 }
 
 static void locationAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::locationAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void locationAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* proxyImpl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* proxyImpl = V8TestObjectPython::toNative(holder);
     RefPtr<TestNode> impl = WTF::getPtr(proxyImpl->location());
     if (!impl)
         return;
     V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, cppValue, jsValue);
     impl->setHref(cppValue);
 }
 
 static void locationAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::locationAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void locationWithExceptionAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueFast(info, WTF::getPtr(impl->locationWithException()), impl);
 }
 
 static void locationWithExceptionAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::locationWithExceptionAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void locationWithExceptionAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* proxyImpl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* proxyImpl = V8TestObjectPython::toNative(holder);
     RefPtr<TestNode> impl = WTF::getPtr(proxyImpl->locationWithException());
     if (!impl)
         return;
     V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, cppValue, jsValue);
     impl->setHrefThrows(cppValue);
 }
 
 static void locationWithExceptionAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::locationWithExceptionAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void locationWithCallWithAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueFast(info, WTF::getPtr(impl->locationWithCallWith()), impl);
 }
 
 static void locationWithCallWithAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::locationWithCallWithAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void locationWithCallWithAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* proxyImpl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* proxyImpl = V8TestObjectPython::toNative(holder);
     RefPtr<TestNode> impl = WTF::getPtr(proxyImpl->locationWithCallWith());
     if (!impl)
         return;
     V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, cppValue, jsValue);
     impl->setHrefCallWith(callingDOMWindow(info.GetIsolate()), enteredDOMWindow(info.GetIsolate()), cppValue);
 }
 
 static void locationWithCallWithAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::locationWithCallWithAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void locationWithPerWorldBindingsAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueFast(info, WTF::getPtr(impl->locationWithPerWorldBindings()), impl);
 }
 
 static void locationWithPerWorldBindingsAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::locationWithPerWorldBindingsAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void locationWithPerWorldBindingsAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* proxyImpl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* proxyImpl = V8TestObjectPython::toNative(holder);
     RefPtr<TestNode> impl = WTF::getPtr(proxyImpl->locationWithPerWorldBindings());
     if (!impl)
         return;
     V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, cppValue, jsValue);
     impl->setHref(cppValue);
 }
 
 static void locationWithPerWorldBindingsAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::locationWithPerWorldBindingsAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void locationWithPerWorldBindingsAttributeGetterForMainWorld(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueForMainWorld(info, WTF::getPtr(impl->locationWithPerWorldBindings()));
 }
 
 static void locationWithPerWorldBindingsAttributeGetterCallbackForMainWorld(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::locationWithPerWorldBindingsAttributeGetterForMainWorld(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void locationWithPerWorldBindingsAttributeSetterForMainWorld(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* proxyImpl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* proxyImpl = V8TestObjectPython::toNative(holder);
     RefPtr<TestNode> impl = WTF::getPtr(proxyImpl->locationWithPerWorldBindings());
     if (!impl)
         return;
     V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, cppValue, jsValue);
     impl->setHref(cppValue);
 }
 
 static void locationWithPerWorldBindingsAttributeSetterCallbackForMainWorld(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::locationWithPerWorldBindingsAttributeSetterForMainWorld(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void locationWillBeGarbageCollectedAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     RefPtrWillBeRawPtr<TestInterfaceWillBeGarbageCollected> result(impl->locationWillBeGarbageCollected());
     if (result && DOMDataStore::setReturnValueFromWrapper<V8TestInterfaceWillBeGarbageCollected>(info.GetReturnValue(), result.get()))
         return;
-    v8::Handle<v8::Value> wrapper = toV8(result.get(), info.Holder(), info.GetIsolate());
+    v8::Handle<v8::Value> wrapper = toV8(result.get(), holder, info.GetIsolate());
     if (!wrapper.IsEmpty()) {
-        V8HiddenValue::setHiddenValue(info.GetIsolate(), info.Holder(), v8AtomicString(info.GetIsolate(), "locationWillBeGarbageCollected"), wrapper);
+        V8HiddenValue::setHiddenValue(info.GetIsolate(), holder, v8AtomicString(info.GetIsolate(), "locationWillBeGarbageCollected"), wrapper);
         v8SetReturnValue(info, wrapper);
     }
 }
 
 static void locationWillBeGarbageCollectedAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::locationWillBeGarbageCollectedAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void locationWillBeGarbageCollectedAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* proxyImpl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* proxyImpl = V8TestObjectPython::toNative(holder);
     RefPtrWillBeRawPtr<TestInterfaceWillBeGarbageCollected> impl = WTF::getPtr(proxyImpl->locationWillBeGarbageCollected());
     if (!impl)
         return;
     V8TRYCATCH_VOID(TestInterfaceWillBeGarbageCollected*, cppValue, V8TestInterfaceWillBeGarbageCollected::toNativeWithTypeCheck(info.GetIsolate(), jsValue));
     impl->setAttr1(WTF::getPtr(cppValue));
 }
 
 static void locationWillBeGarbageCollectedAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::locationWillBeGarbageCollectedAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void raisesExceptionLongAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
-    ExceptionState exceptionState(ExceptionState::GetterContext, "raisesExceptionLongAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
+    ExceptionState exceptionState(ExceptionState::GetterContext, "raisesExceptionLongAttribute", "TestObjectPython", holder, info.GetIsolate());
     int jsValue = impl->raisesExceptionLongAttribute(exceptionState);
     if (UNLIKELY(exceptionState.throwIfNeeded()))
         return;
     v8SetReturnValueInt(info, jsValue);
 }
 
 static void raisesExceptionLongAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::raisesExceptionLongAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void raisesExceptionLongAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "raisesExceptionLongAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "raisesExceptionLongAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(int, cppValue, toInt32(jsValue, exceptionState), exceptionState);
     impl->setRaisesExceptionLongAttribute(cppValue, exceptionState);
     exceptionState.throwIfNeeded();
 }
 
 static void raisesExceptionLongAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::raisesExceptionLongAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void raisesExceptionGetterLongAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
-    ExceptionState exceptionState(ExceptionState::GetterContext, "raisesExceptionGetterLongAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
+    ExceptionState exceptionState(ExceptionState::GetterContext, "raisesExceptionGetterLongAttribute", "TestObjectPython", holder, info.GetIsolate());
     int jsValue = impl->raisesExceptionGetterLongAttribute(exceptionState);
     if (UNLIKELY(exceptionState.throwIfNeeded()))
         return;
     v8SetReturnValueInt(info, jsValue);
 }
 
 static void raisesExceptionGetterLongAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::raisesExceptionGetterLongAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void raisesExceptionGetterLongAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "raisesExceptionGetterLongAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "raisesExceptionGetterLongAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(int, cppValue, toInt32(jsValue, exceptionState), exceptionState);
     impl->setRaisesExceptionGetterLongAttribute(cppValue);
 }
 
 static void raisesExceptionGetterLongAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::raisesExceptionGetterLongAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void setterRaisesExceptionLongAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueInt(info, impl->setterRaisesExceptionLongAttribute());
 }
 
 static void setterRaisesExceptionLongAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::setterRaisesExceptionLongAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void setterRaisesExceptionLongAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "setterRaisesExceptionLongAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "setterRaisesExceptionLongAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(int, cppValue, toInt32(jsValue, exceptionState), exceptionState);
     impl->setSetterRaisesExceptionLongAttribute(cppValue, exceptionState);
     exceptionState.throwIfNeeded();
 }
 
 static void setterRaisesExceptionLongAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::setterRaisesExceptionLongAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void raisesExceptionTestInterfaceEmptyAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
-    ExceptionState exceptionState(ExceptionState::GetterContext, "raisesExceptionTestInterfaceEmptyAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
+    ExceptionState exceptionState(ExceptionState::GetterContext, "raisesExceptionTestInterfaceEmptyAttribute", "TestObjectPython", holder, info.GetIsolate());
     RefPtr<TestInterfaceEmpty> jsValue = impl->raisesExceptionTestInterfaceEmptyAttribute(exceptionState);
     if (UNLIKELY(exceptionState.throwIfNeeded()))
         return;
     v8SetReturnValueFast(info, WTF::getPtr(jsValue.release()), impl);
 }
 
 static void raisesExceptionTestInterfaceEmptyAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::raisesExceptionTestInterfaceEmptyAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void raisesExceptionTestInterfaceEmptyAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "raisesExceptionTestInterfaceEmptyAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "raisesExceptionTestInterfaceEmptyAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_VOID(TestInterfaceEmpty*, cppValue, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), jsValue));
     impl->setRaisesExceptionTestInterfaceEmptyAttribute(WTF::getPtr(cppValue), exceptionState);
     exceptionState.throwIfNeeded();
 }
 
 static void raisesExceptionTestInterfaceEmptyAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::raisesExceptionTestInterfaceEmptyAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void cachedAttributeRaisesExceptionGetterAnyAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
+    v8::Handle<v8::Object> holder = info.Holder();
     v8::Handle<v8::String> propertyName = v8AtomicString(info.GetIsolate(), "cachedAttributeRaisesExceptionGetterAnyAttribute");
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     if (!impl->isValueDirty()) {
-        v8::Handle<v8::Value> jsValue = V8HiddenValue::getHiddenValue(info.GetIsolate(), info.Holder(), propertyName);
+        v8::Handle<v8::Value> jsValue = V8HiddenValue::getHiddenValue(info.GetIsolate(), holder, propertyName);
         if (!jsValue.IsEmpty()) {
             v8SetReturnValue(info, jsValue);
             return;
         }
     }
-    ExceptionState exceptionState(ExceptionState::GetterContext, "cachedAttributeRaisesExceptionGetterAnyAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
+    ExceptionState exceptionState(ExceptionState::GetterContext, "cachedAttributeRaisesExceptionGetterAnyAttribute", "TestObjectPython", holder, info.GetIsolate());
     ScriptValue jsValue = impl->cachedAttributeRaisesExceptionGetterAnyAttribute(exceptionState);
     if (UNLIKELY(exceptionState.throwIfNeeded()))
         return;
-    V8HiddenValue::setHiddenValue(info.GetIsolate(), info.Holder(), propertyName, jsValue.v8Value());
+    V8HiddenValue::setHiddenValue(info.GetIsolate(), holder, propertyName, jsValue.v8Value());
     v8SetReturnValue(info, jsValue.v8Value());
 }
 
 static void cachedAttributeRaisesExceptionGetterAnyAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::cachedAttributeRaisesExceptionGetterAnyAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void cachedAttributeRaisesExceptionGetterAnyAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "cachedAttributeRaisesExceptionGetterAnyAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "cachedAttributeRaisesExceptionGetterAnyAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_VOID(ScriptValue, cppValue, ScriptValue(jsValue, info.GetIsolate()));
     impl->setCachedAttributeRaisesExceptionGetterAnyAttribute(cppValue, exceptionState);
     exceptionState.throwIfNeeded();
-    V8HiddenValue::deleteHiddenValue(info.GetIsolate(), info.Holder(), v8AtomicString(info.GetIsolate(), "cachedAttributeRaisesExceptionGetterAnyAttribute")); // Invalidate the cached value.
+    V8HiddenValue::deleteHiddenValue(info.GetIsolate(), holder, v8AtomicString(info.GetIsolate(), "cachedAttributeRaisesExceptionGetterAnyAttribute")); // Invalidate the cached value.
 }
 
 static void cachedAttributeRaisesExceptionGetterAnyAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::cachedAttributeRaisesExceptionGetterAnyAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void reflectTestInterfaceAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueFast(info, WTF::getPtr(impl->fastGetAttribute(HTMLNames::reflecttestinterfaceattributeAttr)), impl);
 }
 
 static void reflectTestInterfaceAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::reflectTestInterfaceAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void reflectTestInterfaceAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_VOID(TestInterface*, cppValue, V8TestInterface::toNativeWithTypeCheck(info.GetIsolate(), jsValue));
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     impl->setAttribute(HTMLNames::reflecttestinterfaceattributeAttr, WTF::getPtr(cppValue));
 }
 
 static void reflectTestInterfaceAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     TestObjectPythonV8Internal::reflectTestInterfaceAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void reflectReflectedNameAttributeTestAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueFast(info, WTF::getPtr(impl->fastGetAttribute(HTMLNames::reflectedNameAttributeAttr)), impl);
 }
 
 static void reflectReflectedNameAttributeTestAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::reflectReflectedNameAttributeTestAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void reflectReflectedNameAttributeTestAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_VOID(TestInterface*, cppValue, V8TestInterface::toNativeWithTypeCheck(info.GetIsolate(), jsValue));
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     impl->setAttribute(HTMLNames::reflectedNameAttributeAttr, WTF::getPtr(cppValue));
 }
 
 static void reflectReflectedNameAttributeTestAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     TestObjectPythonV8Internal::reflectReflectedNameAttributeTestAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void reflectBooleanAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueBool(info, impl->fastHasAttribute(HTMLNames::reflectbooleanattributeAttr));
 }
 
 static void reflectBooleanAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::reflectBooleanAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void reflectBooleanAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_VOID(bool, cppValue, jsValue->BooleanValue());
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     impl->setBooleanAttribute(HTMLNames::reflectbooleanattributeAttr, cppValue);
 }
 
 static void reflectBooleanAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     TestObjectPythonV8Internal::reflectBooleanAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void reflectLongAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueInt(info, impl->getIntegralAttribute(HTMLNames::reflectlongattributeAttr));
 }
 
 static void reflectLongAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::reflectLongAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void reflectLongAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "reflectLongAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "reflectLongAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(int, cppValue, toInt32(jsValue, exceptionState), exceptionState);
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     impl->setIntegralAttribute(HTMLNames::reflectlongattributeAttr, cppValue);
 }
 
 static void reflectLongAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     TestObjectPythonV8Internal::reflectLongAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void reflectUnsignedShortAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueUnsigned(info, std::max(0, impl->fastGetAttribute(HTMLNames::reflectunsignedshortattributeAttr)));
 }
 
 static void reflectUnsignedShortAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::reflectUnsignedShortAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void reflectUnsignedShortAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "reflectUnsignedShortAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "reflectUnsignedShortAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(unsigned, cppValue, toUInt16(jsValue, exceptionState), exceptionState);
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     impl->setAttribute(HTMLNames::reflectunsignedshortattributeAttr, cppValue);
 }
 
 static void reflectUnsignedShortAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     TestObjectPythonV8Internal::reflectUnsignedShortAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void reflectUnsignedLongAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueUnsigned(info, std::max(0, impl->getIntegralAttribute(HTMLNames::reflectunsignedlongattributeAttr)));
 }
 
 static void reflectUnsignedLongAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::reflectUnsignedLongAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void reflectUnsignedLongAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "reflectUnsignedLongAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "reflectUnsignedLongAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(unsigned, cppValue, toUInt32(jsValue, exceptionState), exceptionState);
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     impl->setUnsignedIntegralAttribute(HTMLNames::reflectunsignedlongattributeAttr, cppValue);
 }
 
 static void reflectUnsignedLongAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     TestObjectPythonV8Internal::reflectUnsignedLongAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void idAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueString(info, impl->getIdAttribute(), info.GetIsolate());
 }
 
 static void idAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::idAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void idAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, cppValue, jsValue);
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     impl->setAttribute(HTMLNames::idAttr, cppValue);
 }
 
 static void idAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     TestObjectPythonV8Internal::idAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void nameAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueString(info, impl->getNameAttribute(), info.GetIsolate());
 }
 
 static void nameAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::nameAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void nameAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, cppValue, jsValue);
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     impl->setAttribute(HTMLNames::nameAttr, cppValue);
 }
 
 static void nameAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     TestObjectPythonV8Internal::nameAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void classAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueString(info, impl->getClassAttribute(), info.GetIsolate());
 }
 
 static void classAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::classAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void classAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, cppValue, jsValue);
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     impl->setAttribute(HTMLNames::classAttr, cppValue);
 }
 
 static void classAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     TestObjectPythonV8Internal::classAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void reflectedIdAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueString(info, impl->getIdAttribute(), info.GetIsolate());
 }
 
 static void reflectedIdAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::reflectedIdAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void reflectedIdAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, cppValue, jsValue);
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     impl->setAttribute(HTMLNames::idAttr, cppValue);
 }
 
 static void reflectedIdAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     TestObjectPythonV8Internal::reflectedIdAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void reflectedNameAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueString(info, impl->getNameAttribute(), info.GetIsolate());
 }
 
 static void reflectedNameAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::reflectedNameAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void reflectedNameAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, cppValue, jsValue);
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     impl->setAttribute(HTMLNames::nameAttr, cppValue);
 }
 
 static void reflectedNameAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     TestObjectPythonV8Internal::reflectedNameAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void reflectedClassAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueString(info, impl->getClassAttribute(), info.GetIsolate());
 }
 
 static void reflectedClassAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::reflectedClassAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void reflectedClassAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, cppValue, jsValue);
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     impl->setAttribute(HTMLNames::classAttr, cppValue);
 }
 
 static void reflectedClassAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     TestObjectPythonV8Internal::reflectedClassAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void limitedToOnlyOneAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     String jsValue = impl->fastGetAttribute(HTMLNames::limitedtoonlyoneattributeAttr);
     if (jsValue.isEmpty()) {
         ;
     } else if (equalIgnoringCase(jsValue, "unique")) {
         jsValue = "unique";
     } else {
         jsValue = "";
     }
     v8SetReturnValueString(info, jsValue, info.GetIsolate());
 }
 
 static void limitedToOnlyOneAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::limitedToOnlyOneAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void limitedToOnlyOneAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, cppValue, jsValue);
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     impl->setAttribute(HTMLNames::limitedtoonlyoneattributeAttr, cppValue);
 }
 
 static void limitedToOnlyOneAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     TestObjectPythonV8Internal::limitedToOnlyOneAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void limitedToOnlyAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     String jsValue = impl->fastGetAttribute(HTMLNames::limitedtoonlyattributeAttr);
     if (jsValue.isEmpty()) {
         ;
     } else if (equalIgnoringCase(jsValue, "Per")) {
         jsValue = "Per";
     } else if (equalIgnoringCase(jsValue, "Paal")) {
         jsValue = "Paal";
     } else if (equalIgnoringCase(jsValue, "Espen")) {
         jsValue = "Espen";
     } else {
         jsValue = "";
     }
     v8SetReturnValueString(info, jsValue, info.GetIsolate());
 }
 
 static void limitedToOnlyAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::limitedToOnlyAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void limitedToOnlyAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, cppValue, jsValue);
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     impl->setAttribute(HTMLNames::limitedtoonlyattributeAttr, cppValue);
 }
 
 static void limitedToOnlyAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     TestObjectPythonV8Internal::limitedToOnlyAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void limitedToOnlyOtherAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     String jsValue = impl->fastGetAttribute(HTMLNames::OtherAttr);
     if (jsValue.isEmpty()) {
         ;
     } else if (equalIgnoringCase(jsValue, "Value1")) {
         jsValue = "Value1";
     } else if (equalIgnoringCase(jsValue, "Value2")) {
         jsValue = "Value2";
     } else {
         jsValue = "";
     }
     v8SetReturnValueString(info, jsValue, info.GetIsolate());
 }
 
 static void limitedToOnlyOtherAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::limitedToOnlyOtherAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void limitedToOnlyOtherAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, cppValue, jsValue);
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     impl->setAttribute(HTMLNames::OtherAttr, cppValue);
 }
 
 static void limitedToOnlyOtherAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     TestObjectPythonV8Internal::limitedToOnlyOtherAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void limitedWithMissingDefaultAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     String jsValue = impl->fastGetAttribute(HTMLNames::limitedwithmissingdefaultattributeAttr);
     if (jsValue.isEmpty()) {
         jsValue = "rsa";
     } else if (equalIgnoringCase(jsValue, "rsa")) {
         jsValue = "rsa";
     } else if (equalIgnoringCase(jsValue, "dsa")) {
         jsValue = "dsa";
     } else {
         jsValue = "";
     }
     v8SetReturnValueString(info, jsValue, info.GetIsolate());
 }
 
 static void limitedWithMissingDefaultAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::limitedWithMissingDefaultAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void limitedWithMissingDefaultAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, cppValue, jsValue);
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     impl->setAttribute(HTMLNames::limitedwithmissingdefaultattributeAttr, cppValue);
 }
 
 static void limitedWithMissingDefaultAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     TestObjectPythonV8Internal::limitedWithMissingDefaultAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void limitedWithInvalidMissingDefaultAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     String jsValue = impl->fastGetAttribute(HTMLNames::limitedwithinvalidmissingdefaultattributeAttr);
     if (jsValue.isEmpty()) {
         jsValue = "auto";
     } else if (equalIgnoringCase(jsValue, "ltr")) {
         jsValue = "ltr";
     } else if (equalIgnoringCase(jsValue, "rtl")) {
         jsValue = "rtl";
     } else if (equalIgnoringCase(jsValue, "auto")) {
         jsValue = "auto";
     } else {
         jsValue = "ltr";
     }
     v8SetReturnValueString(info, jsValue, info.GetIsolate());
 }
 
 static void limitedWithInvalidMissingDefaultAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::limitedWithInvalidMissingDefaultAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void limitedWithInvalidMissingDefaultAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, cppValue, jsValue);
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     impl->setAttribute(HTMLNames::limitedwithinvalidmissingdefaultattributeAttr, cppValue);
 }
 
 static void limitedWithInvalidMissingDefaultAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     TestObjectPythonV8Internal::limitedWithInvalidMissingDefaultAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void corsSettingAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     String jsValue = impl->fastGetAttribute(HTMLNames::corssettingattributeAttr);
     if (jsValue.isNull()) {
         ;
     } else if (jsValue.isEmpty()) {
         jsValue = "anonymous";
     } else if (equalIgnoringCase(jsValue, "anonymous")) {
         jsValue = "anonymous";
     } else if (equalIgnoringCase(jsValue, "use-credentials")) {
         jsValue = "use-credentials";
     } else {
         jsValue = "anonymous";
     }
     v8SetReturnValueString(info, jsValue, info.GetIsolate());
 }
 
 static void corsSettingAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::corsSettingAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void limitedWithEmptyMissingInvalidAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     String jsValue = impl->fastGetAttribute(HTMLNames::limitedwithemptymissinginvalidattributeAttr);
     if (jsValue.isNull()) {
         jsValue = "missing";
     } else if (jsValue.isEmpty()) {
         jsValue = "empty";
     } else if (equalIgnoringCase(jsValue, "empty")) {
         jsValue = "empty";
     } else if (equalIgnoringCase(jsValue, "missing")) {
         jsValue = "missing";
     } else if (equalIgnoringCase(jsValue, "invalid")) {
         jsValue = "invalid";
     } else if (equalIgnoringCase(jsValue, "a-normal")) {
         jsValue = "a-normal";
     } else {
         jsValue = "invalid";
     }
     v8SetReturnValueString(info, jsValue, info.GetIsolate());
 }
 
 static void limitedWithEmptyMissingInvalidAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::limitedWithEmptyMissingInvalidAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void replaceableReadonlyLongAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueInt(info, impl->replaceableReadonlyLongAttribute());
 }
 
 static void replaceableReadonlyLongAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::replaceableReadonlyLongAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void locationReplaceableAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueFast(info, WTF::getPtr(impl->locationReplaceable()), impl);
 }
 
 static void locationReplaceableAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::locationReplaceableAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void locationReplaceableAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* proxyImpl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* proxyImpl = V8TestObjectPython::toNative(holder);
     RefPtr<TestNode> impl = WTF::getPtr(proxyImpl->locationReplaceable());
     if (!impl)
         return;
     V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, cppValue, jsValue);
     impl->setHref(cppValue);
 }
 
 static void locationReplaceableAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::locationReplaceableAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void runtimeEnabledLongAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueInt(info, impl->runtimeEnabledLongAttribute());
 }
 
 static void runtimeEnabledLongAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::runtimeEnabledLongAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void runtimeEnabledLongAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "runtimeEnabledLongAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "runtimeEnabledLongAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(int, cppValue, toInt32(jsValue, exceptionState), exceptionState);
     impl->setRuntimeEnabledLongAttribute(cppValue);
 }
 
 static void runtimeEnabledLongAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::runtimeEnabledLongAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void perContextEnabledRuntimeEnabledLongAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueInt(info, impl->perContextEnabledRuntimeEnabledLongAttribute());
 }
 
 static void perContextEnabledRuntimeEnabledLongAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::perContextEnabledRuntimeEnabledLongAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void perContextEnabledRuntimeEnabledLongAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "perContextEnabledRuntimeEnabledLongAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "perContextEnabledRuntimeEnabledLongAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(int, cppValue, toInt32(jsValue, exceptionState), exceptionState);
     impl->setPerContextEnabledRuntimeEnabledLongAttribute(cppValue);
 }
 
 static void perContextEnabledRuntimeEnabledLongAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::perContextEnabledRuntimeEnabledLongAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 #if ENABLE(CONDITION)
 static void conditionalRuntimeEnabledLongAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueInt(info, impl->conditionalRuntimeEnabledLongAttribute());
 }
 #endif // ENABLE(CONDITION)
 
 #if ENABLE(CONDITION)
 static void conditionalRuntimeEnabledLongAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::conditionalRuntimeEnabledLongAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 #endif // ENABLE(CONDITION)
 
 #if ENABLE(CONDITION)
 static void conditionalRuntimeEnabledLongAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "conditionalRuntimeEnabledLongAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "conditionalRuntimeEnabledLongAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(int, cppValue, toInt32(jsValue, exceptionState), exceptionState);
     impl->setConditionalRuntimeEnabledLongAttribute(cppValue);
 }
 #endif // ENABLE(CONDITION)
 
 #if ENABLE(CONDITION)
 static void conditionalRuntimeEnabledLongAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::conditionalRuntimeEnabledLongAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 #endif // ENABLE(CONDITION)
 
 static void setterCallWithActiveWindowAndFirstWindowStringAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueString(info, impl->setterCallWithActiveWindowAndFirstWindowStringAttribute(), info.GetIsolate());
 }
 
 static void setterCallWithActiveWindowAndFirstWindowStringAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::setterCallWithActiveWindowAndFirstWindowStringAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void setterCallWithActiveWindowAndFirstWindowStringAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, cppValue, jsValue);
     impl->setSetterCallWithActiveWindowAndFirstWindowStringAttribute(callingDOMWindow(info.GetIsolate()), enteredDOMWindow(info.GetIsolate()), cppValue);
 }
 
 static void setterCallWithActiveWindowAndFirstWindowStringAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::setterCallWithActiveWindowAndFirstWindowStringAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void setterCallWithExecutionContextStringAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueString(info, impl->setterCallWithExecutionContextStringAttribute(), info.GetIsolate());
 }
 
 static void setterCallWithExecutionContextStringAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::setterCallWithExecutionContextStringAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void setterCallWithExecutionContextStringAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, cppValue, jsValue);
     ExecutionContext* scriptContext = currentExecutionContext(info.GetIsolate());
     impl->setSetterCallWithExecutionContextStringAttribute(scriptContext, cppValue);
 }
 
 static void setterCallWithExecutionContextStringAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::setterCallWithExecutionContextStringAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void strictTypeCheckingFloatAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValue(info, impl->strictTypeCheckingFloatAttribute());
 }
 
 static void strictTypeCheckingFloatAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::strictTypeCheckingFloatAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void strictTypeCheckingFloatAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_VOID(float, cppValue, static_cast<float>(jsValue->NumberValue()));
     impl->setStrictTypeCheckingFloatAttribute(cppValue);
 }
 
 static void strictTypeCheckingFloatAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::strictTypeCheckingFloatAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void strictTypeCheckingTestInterfaceAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueFast(info, WTF::getPtr(impl->strictTypeCheckingTestInterfaceAttribute()), impl);
 }
 
 static void strictTypeCheckingTestInterfaceAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::strictTypeCheckingTestInterfaceAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void strictTypeCheckingTestInterfaceAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "strictTypeCheckingTestInterfaceAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "strictTypeCheckingTestInterfaceAttribute", "TestObjectPython", holder, info.GetIsolate());
     if (!isUndefinedOrNull(jsValue) && !V8TestInterface::hasInstance(jsValue, info.GetIsolate())) {
         exceptionState.throwTypeError("The provided value is not of type 'TestInterface'.");
         exceptionState.throwIfNeeded();
         return;
     }
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_VOID(TestInterface*, cppValue, V8TestInterface::toNativeWithTypeCheck(info.GetIsolate(), jsValue));
     impl->setStrictTypeCheckingTestInterfaceAttribute(WTF::getPtr(cppValue));
 }
 
 static void strictTypeCheckingTestInterfaceAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::strictTypeCheckingTestInterfaceAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void treatNullAsNullStringStringAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueString(info, impl->treatNullAsNullStringStringAttribute(), info.GetIsolate());
 }
 
 static void treatNullAsNullStringStringAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::treatNullAsNullStringStringAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void treatNullAsNullStringStringAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<WithNullCheck>, cppValue, jsValue);
     impl->setTreatNullAsNullStringStringAttribute(cppValue);
 }
 
 static void treatNullAsNullStringStringAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::treatNullAsNullStringStringAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void treatReturnedNullStringAsNullStringAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueStringOrNull(info, impl->treatReturnedNullStringAsNullStringAttribute(), info.GetIsolate());
 }
 
 static void treatReturnedNullStringAsNullStringAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::treatReturnedNullStringAsNullStringAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void treatReturnedNullStringAsNullStringAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, cppValue, jsValue);
     impl->setTreatReturnedNullStringAsNullStringAttribute(cppValue);
 }
 
 static void treatReturnedNullStringAsNullStringAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::treatReturnedNullStringAsNullStringAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void treatReturnedNullStringAsUndefinedStringAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueStringOrUndefined(info, impl->treatReturnedNullStringAsUndefinedStringAttribute(), info.GetIsolate());
 }
 
 static void treatReturnedNullStringAsUndefinedStringAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::treatReturnedNullStringAsUndefinedStringAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void treatReturnedNullStringAsUndefinedStringAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, cppValue, jsValue);
     impl->setTreatReturnedNullStringAsUndefinedStringAttribute(cppValue);
 }
 
 static void treatReturnedNullStringAsUndefinedStringAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::treatReturnedNullStringAsUndefinedStringAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void urlStringAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueString(info, impl->getURLAttribute(HTMLNames::urlstringattributeAttr), info.GetIsolate());
 }
 
 static void urlStringAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::urlStringAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void urlStringAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, cppValue, jsValue);
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     impl->setAttribute(HTMLNames::urlstringattributeAttr, cppValue);
 }
 
 static void urlStringAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     TestObjectPythonV8Internal::urlStringAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void urlStringAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueString(info, impl->getURLAttribute(HTMLNames::ReflectUrlAttributeAttr), info.GetIsolate());
 }
 
 static void urlStringAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::urlStringAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void urlStringAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, cppValue, jsValue);
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     impl->setAttribute(HTMLNames::ReflectUrlAttributeAttr, cppValue);
 }
 
 static void urlStringAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     TestObjectPythonV8Internal::urlStringAttributeAttributeSetter(jsValue, info);
@@ skipping 11 matching lines @@
 
 static void unforgeableLongAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::unforgeableLongAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void unforgeableLongAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    ExceptionState exceptionState(ExceptionState::SetterContext, "unforgeableLongAttribute", "TestObjectPython", info.Holder(), info.GetIsolate());
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    ExceptionState exceptionState(ExceptionState::SetterContext, "unforgeableLongAttribute", "TestObjectPython", holder, info.GetIsolate());
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_EXCEPTION_VOID(int, cppValue, toInt32(jsValue, exceptionState), exceptionState);
     impl->setUnforgeableLongAttribute(cppValue);
 }
 
 static void unforgeableLongAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::unforgeableLongAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void anotherStringAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueString(info, impl->fastGetAttribute(HTMLNames::ReflectUrlAttributeAsAStringAttr), info.GetIsolate());
 }
 
 static void anotherStringAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::anotherStringAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void anotherStringAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, cppValue, jsValue);
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     impl->setAttribute(HTMLNames::ReflectUrlAttributeAsAStringAttr, cppValue);
 }
 
 static void anotherStringAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope;
     TestObjectPythonV8Internal::anotherStringAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void testInterfacePythonAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     v8SetReturnValueFast(info, WTF::getPtr(impl->testInterfacePythonAttribute()), impl);
 }
 
 static void testInterfacePythonAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::testInterfacePythonAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void testInterfacePythonAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_VOID(TestInterfacePythonImplementation*, cppValue, V8TestInterfacePython::toNativeWithTypeCheck(info.GetIsolate(), jsValue));
     impl->setTestInterfacePythonAttribute(WTF::getPtr(cppValue));
 }
 
 static void testInterfacePythonAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::testInterfacePythonAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void testInterfaceWillBeGarbageCollectedAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(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");
     TestObjectPythonV8Internal::testInterfaceWillBeGarbageCollectedAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void testInterfaceWillBeGarbageCollectedAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_VOID(TestInterfaceWillBeGarbageCollected*, cppValue, V8TestInterfaceWillBeGarbageCollected::toNativeWithTypeCheck(info.GetIsolate(), jsValue));
     impl->setTestInterfaceWillBeGarbageCollectedAttribute(WTF::getPtr(cppValue));
 }
 
 static void testInterfaceWillBeGarbageCollectedAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::testInterfaceWillBeGarbageCollectedAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void testInterfaceWillBeGarbageCollectedOrNullAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     bool isNull = false;
     RefPtrWillBeRawPtr<TestInterfaceWillBeGarbageCollected> jsValue = impl->testInterfaceWillBeGarbageCollectedOrNullAttribute(isNull);
     if (isNull) {
         v8SetReturnValueNull(info);
         return;
     }
     v8SetReturnValueFast(info, WTF::getPtr(jsValue.release()), impl);
 }
 
 static void testInterfaceWillBeGarbageCollectedOrNullAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjectPythonV8Internal::testInterfaceWillBeGarbageCollectedOrNullAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void testInterfaceWillBeGarbageCollectedOrNullAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
-    TestObjectPython* impl = V8TestObjectPython::toNative(info.Holder());
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObjectPython* impl = V8TestObjectPython::toNative(holder);
     V8TRYCATCH_VOID(TestInterfaceWillBeGarbageCollected*, cppValue, V8TestInterfaceWillBeGarbageCollected::toNativeWithTypeCheck(info.GetIsolate(), jsValue));
     impl->setTestInterfaceWillBeGarbageCollectedOrNullAttribute(WTF::getPtr(cppValue));
 }
 
 static void testInterfaceWillBeGarbageCollectedOrNullAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjectPythonV8Internal::testInterfaceWillBeGarbageCollectedOrNullAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
@@ skipping 3795 matching lines @@
     fromInternalPointer(object)->deref();
 }
 
 template<>
 v8::Handle<v8::Value> toV8NoInline(TestObjectPython* impl, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
 {
     return toV8(impl, creationContext, isolate);
 }
 
 } // namespace WebCore