V8 Binding: Introduce toNativeWithTypeCheck

Source/bindings/tests/results/V8TestObject.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 526 matching lines @@
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     UseCounter::count(callingExecutionContext(info.GetIsolate()), UseCounter::TestFeature);
     TestObjV8Internal::testObjAttrAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void testObjAttrAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TestObj* imp = V8TestObject::toNative(info.Holder());
-    V8TRYCATCH_VOID(TestObj*, cppValue, V8TestObject::hasInstance(jsValue, info.GetIsolate()) ? V8TestObject::toNative(v8::Handle<v8::Object>::Cast(jsValue)) : 0);
+    V8TRYCATCH_VOID(TestObj*, cppValue, V8TestObject::toNativeWithTypeCheck(info.GetIsolate(), jsValue));
     imp->setTestObjAttr(WTF::getPtr(cppValue));
 }
 
 static void testObjAttrAttributeSetterCallback(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);
     TestObjV8Internal::testObjAttrAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
@@ skipping 35 matching lines @@
 static void XMLObjAttrAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjV8Internal::XMLObjAttrAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void XMLObjAttrAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TestObj* imp = V8TestObject::toNative(info.Holder());
-    V8TRYCATCH_VOID(TestObj*, cppValue, V8TestObject::hasInstance(jsValue, info.GetIsolate()) ? V8TestObject::toNative(v8::Handle<v8::Object>::Cast(jsValue)) : 0);
+    V8TRYCATCH_VOID(TestObj*, cppValue, V8TestObject::toNativeWithTypeCheck(info.GetIsolate(), jsValue));
     imp->setXMLObjAttr(WTF::getPtr(cppValue));
 }
 
 static void XMLObjAttrAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjV8Internal::XMLObjAttrAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
@@ skipping 955 matching lines @@
 static void withExecutionContextAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjV8Internal::withExecutionContextAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void withExecutionContextAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TestObj* imp = V8TestObject::toNative(info.Holder());
-    V8TRYCATCH_VOID(TestObj*, cppValue, V8TestObject::hasInstance(jsValue, info.GetIsolate()) ? V8TestObject::toNative(v8::Handle<v8::Object>::Cast(jsValue)) : 0);
+    V8TRYCATCH_VOID(TestObj*, cppValue, V8TestObject::toNativeWithTypeCheck(info.GetIsolate(), jsValue));
     ExecutionContext* scriptContext = currentExecutionContext(info.GetIsolate());
     imp->setWithExecutionContextAttribute(scriptContext, WTF::getPtr(cppValue));
 }
 
 static void withExecutionContextAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjV8Internal::withExecutionContextAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void withActiveWindowAndFirstWindowAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TestObj* imp = V8TestObject::toNative(info.Holder());
     v8SetReturnValueFast(info, imp->withActiveWindowAndFirstWindowAttribute(), imp);
 }
 
 static void withActiveWindowAndFirstWindowAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjV8Internal::withActiveWindowAndFirstWindowAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void withActiveWindowAndFirstWindowAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TestObj* imp = V8TestObject::toNative(info.Holder());
-    V8TRYCATCH_VOID(TestObj*, cppValue, V8TestObject::hasInstance(jsValue, info.GetIsolate()) ? V8TestObject::toNative(v8::Handle<v8::Object>::Cast(jsValue)) : 0);
+    V8TRYCATCH_VOID(TestObj*, cppValue, V8TestObject::toNativeWithTypeCheck(info.GetIsolate(), jsValue));
     imp->setWithActiveWindowAndFirstWindowAttribute(callingDOMWindow(info.GetIsolate()), enteredDOMWindow(info.GetIsolate()), WTF::getPtr(cppValue));
 }
 
 static void withActiveWindowAndFirstWindowAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjV8Internal::withActiveWindowAndFirstWindowAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
@@ skipping 10 matching lines @@
 static void withScriptStateAttributeRaisesAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjV8Internal::withScriptStateAttributeRaisesAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void withScriptStateAttributeRaisesAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TestObj* imp = V8TestObject::toNative(info.Holder());
-    V8TRYCATCH_VOID(TestObj*, cppValue, V8TestObject::hasInstance(jsValue, info.GetIsolate()) ? V8TestObject::toNative(v8::Handle<v8::Object>::Cast(jsValue)) : 0);
+    V8TRYCATCH_VOID(TestObj*, cppValue, V8TestObject::toNativeWithTypeCheck(info.GetIsolate(), jsValue));
     imp->setWithScriptStateAttributeRaises(WTF::getPtr(cppValue));
 }
 
 static void withScriptStateAttributeRaisesAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjV8Internal::withScriptStateAttributeRaisesAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
@@ skipping 841 matching lines @@
 static void perWorldAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjV8Internal::perWorldAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void perWorldAttributeAttributeSetter(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TestObj* imp = V8TestObject::toNative(info.Holder());
-    V8TRYCATCH_VOID(TestObj*, cppValue, V8TestObject::hasInstance(jsValue, info.GetIsolate()) ? V8TestObject::toNative(v8::Handle<v8::Object>::Cast(jsValue)) : 0);
+    V8TRYCATCH_VOID(TestObj*, cppValue, V8TestObject::toNativeWithTypeCheck(info.GetIsolate(), jsValue));
     imp->setPerWorldAttribute(WTF::getPtr(cppValue));
 }
 
 static void perWorldAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjV8Internal::perWorldAttributeAttributeSetter(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void perWorldAttributeAttributeGetterForMainWorld(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TestObj* imp = V8TestObject::toNative(info.Holder());
     v8SetReturnValueForMainWorld(info, imp->perWorldAttribute());
 }
 
 static void perWorldAttributeAttributeGetterCallbackForMainWorld(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMGetter");
     TestObjV8Internal::perWorldAttributeAttributeGetterForMainWorld(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void perWorldAttributeAttributeSetterForMainWorld(v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TestObj* imp = V8TestObject::toNative(info.Holder());
-    V8TRYCATCH_VOID(TestObj*, cppValue, V8TestObject::hasInstance(jsValue, info.GetIsolate()) ? V8TestObject::toNative(v8::Handle<v8::Object>::Cast(jsValue)) : 0);
+    V8TRYCATCH_VOID(TestObj*, cppValue, V8TestObject::toNativeWithTypeCheck(info.GetIsolate(), jsValue));
     imp->setPerWorldAttribute(WTF::getPtr(cppValue));
 }
 
 static void perWorldAttributeAttributeSetterCallbackForMainWorld(v8::Local<v8::String>, v8::Local<v8::Value> jsValue, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMSetter");
     TestObjV8Internal::perWorldAttributeAttributeSetterForMainWorld(jsValue, info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
@@ skipping 663 matching lines @@
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "voidMethodWithArgs", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 3)) {
         exceptionState.throwTypeError(ExceptionMessages::notEnoughArguments(3, info.Length()));
         exceptionState.throwIfNeeded();
         return;
     }
     TestObj* imp = V8TestObject::toNative(info.Holder());
     V8TRYCATCH_EXCEPTION_VOID(int, longArg, toInt32(info[0], exceptionState), exceptionState);
     V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, strArg, info[1]);
-    V8TRYCATCH_VOID(TestObj*, objArg, V8TestObject::hasInstance(info[2], info.GetIsolate()) ? V8TestObject::toNative(v8::Handle<v8::Object>::Cast(info[2])) : 0);
+    V8TRYCATCH_VOID(TestObj*, objArg, V8TestObject::toNativeWithTypeCheck(info.GetIsolate(), info[2]));
     imp->voidMethodWithArgs(longArg, strArg, objArg);
 }
 
 static void voidMethodWithArgsMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjV8Internal::voidMethodWithArgsMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
@@ skipping 14 matching lines @@
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "longMethodWithArgs", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 3)) {
         exceptionState.throwTypeError(ExceptionMessages::notEnoughArguments(3, info.Length()));
         exceptionState.throwIfNeeded();
         return;
     }
     TestObj* imp = V8TestObject::toNative(info.Holder());
     V8TRYCATCH_EXCEPTION_VOID(int, longArg, toInt32(info[0], exceptionState), exceptionState);
     V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, strArg, info[1]);
-    V8TRYCATCH_VOID(TestObj*, objArg, V8TestObject::hasInstance(info[2], info.GetIsolate()) ? V8TestObject::toNative(v8::Handle<v8::Object>::Cast(info[2])) : 0);
+    V8TRYCATCH_VOID(TestObj*, objArg, V8TestObject::toNativeWithTypeCheck(info.GetIsolate(), info[2]));
     v8SetReturnValueInt(info, imp->longMethodWithArgs(longArg, strArg, objArg));
 }
 
 static void longMethodWithArgsMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjV8Internal::longMethodWithArgsMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
@@ skipping 15 matching lines @@
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "objMethodWithArgs", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 3)) {
         exceptionState.throwTypeError(ExceptionMessages::notEnoughArguments(3, info.Length()));
         exceptionState.throwIfNeeded();
         return;
     }
     TestObj* imp = V8TestObject::toNative(info.Holder());
     V8TRYCATCH_EXCEPTION_VOID(int, longArg, toInt32(info[0], exceptionState), exceptionState);
     V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, strArg, info[1]);
-    V8TRYCATCH_VOID(TestObj*, objArg, V8TestObject::hasInstance(info[2], info.GetIsolate()) ? V8TestObject::toNative(v8::Handle<v8::Object>::Cast(info[2])) : 0);
+    V8TRYCATCH_VOID(TestObj*, objArg, V8TestObject::toNativeWithTypeCheck(info.GetIsolate(), info[2]));
     v8SetReturnValue(info, imp->objMethodWithArgs(longArg, strArg, objArg));
 }
 
 static void objMethodWithArgsMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjV8Internal::objMethodWithArgsMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
@@ skipping 61 matching lines @@
 static void methodThatRequiresAllArgsAndThrowsMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "methodThatRequiresAllArgsAndThrows", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 2)) {
         exceptionState.throwTypeError(ExceptionMessages::notEnoughArguments(2, info.Length()));
         exceptionState.throwIfNeeded();
         return;
     }
     TestObj* imp = V8TestObject::toNative(info.Holder());
     V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, strArg, info[0]);
-    V8TRYCATCH_VOID(TestObj*, objArg, V8TestObject::hasInstance(info[1], info.GetIsolate()) ? V8TestObject::toNative(v8::Handle<v8::Object>::Cast(info[1])) : 0);
+    V8TRYCATCH_VOID(TestObj*, objArg, V8TestObject::toNativeWithTypeCheck(info.GetIsolate(), info[1]));
     RefPtr<TestObj> result = imp->methodThatRequiresAllArgsAndThrows(strArg, objArg, exceptionState);
     if (exceptionState.throwIfNeeded())
         return;
     v8SetReturnValue(info, result.release());
 }
 
 static void methodThatRequiresAllArgsAndThrowsMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjV8Internal::methodThatRequiresAllArgsAndThrowsMethod(info);
@@ skipping 898 matching lines @@
     imp->overloadedMethod(callbackInterfaceArg.release());
 }
 
 static void overloadedMethod3Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwTypeError(ExceptionMessages::failedToExecute("overloadedMethod", "TestObject", ExceptionMessages::notEnoughArguments(1, info.Length())), info.GetIsolate());
         return;
     }
     TestObj* imp = V8TestObject::toNative(info.Holder());
-    V8TRYCATCH_VOID(TestObj*, objArg, V8TestObject::hasInstance(info[0], info.GetIsolate()) ? V8TestObject::toNative(v8::Handle<v8::Object>::Cast(info[0])) : 0);
+    V8TRYCATCH_VOID(TestObj*, objArg, V8TestObject::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
     imp->overloadedMethod(objArg);
 }
 
 static void overloadedMethod4Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwTypeError(ExceptionMessages::failedToExecute("overloadedMethod", "TestObject", ExceptionMessages::notEnoughArguments(1, info.Length())), info.GetIsolate());
         return;
     }
     TestObj* imp = V8TestObject::toNative(info.Holder());
@@ skipping 53 matching lines @@
 
 static void overloadedMethodA1Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "overloadedMethodA", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         exceptionState.throwTypeError(ExceptionMessages::notEnoughArguments(1, info.Length()));
         exceptionState.throwIfNeeded();
         return;
     }
     TestObj* imp = V8TestObject::toNative(info.Holder());
-    V8TRYCATCH_VOID(TestObj*, objArg, V8TestObject::hasInstance(info[0], info.GetIsolate()) ? V8TestObject::toNative(v8::Handle<v8::Object>::Cast(info[0])) : 0);
+    V8TRYCATCH_VOID(TestObj*, objArg, V8TestObject::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
     if (UNLIKELY(info.Length() <= 1)) {
         imp->overloadedMethodA(objArg);
         return;
     }
     V8TRYCATCH_EXCEPTION_VOID(int, longArg, toInt32(info[1], exceptionState), exceptionState);
     imp->overloadedMethodA(objArg, longArg);
 }
 
 static void overloadedMethodA2Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 2)) {
         throwTypeError(ExceptionMessages::failedToExecute("overloadedMethodA", "TestObject", ExceptionMessages::notEnoughArguments(2, info.Length())), info.GetIsolate());
         return;
     }
     TestObj* imp = V8TestObject::toNative(info.Holder());
-    V8TRYCATCH_VOID(TestObj*, objArg, V8TestObject::hasInstance(info[0], info.GetIsolate()) ? V8TestObject::toNative(v8::Handle<v8::Object>::Cast(info[0])) : 0);
+    V8TRYCATCH_VOID(TestObj*, objArg, V8TestObject::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
     V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, strArg, info[1]);
     imp->overloadedMethodA(objArg, strArg);
 }
 
 static void overloadedMethodAMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (((info.Length() == 1) && (info[0]->IsNull() || V8TestObject::hasInstance(info[0], info.GetIsolate()))) || ((info.Length() == 2) && (info[0]->IsNull() || V8TestObject::hasInstance(info[0], info.GetIsolate())))) {
         overloadedMethodA1Method(info);
         return;
     }
@@ skipping 267 matching lines @@
 
 static void domStringListFunctionMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "domStringListFunction", "TestObject", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         exceptionState.throwTypeError(ExceptionMessages::notEnoughArguments(1, info.Length()));
         exceptionState.throwIfNeeded();
         return;
     }
     TestObj* imp = V8TestObject::toNative(info.Holder());
-    V8TRYCATCH_VOID(DOMStringList*, values, V8DOMStringList::hasInstance(info[0], info.GetIsolate()) ? V8DOMStringList::toNative(v8::Handle<v8::Object>::Cast(info[0])) : 0);
+    V8TRYCATCH_VOID(DOMStringList*, values, V8DOMStringList::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
     RefPtr<DOMStringList> result = imp->domStringListFunction(values, exceptionState);
     if (exceptionState.throwIfNeeded())
         return;
     v8SetReturnValue(info, result.release());
 }
 
 static void domStringListFunctionMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjV8Internal::domStringListFunctionMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void convert1Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwTypeError(ExceptionMessages::failedToExecute("convert1", "TestObject", ExceptionMessages::notEnoughArguments(1, info.Length())), info.GetIsolate());
         return;
     }
     TestObj* imp = V8TestObject::toNative(info.Holder());
-    V8TRYCATCH_VOID(TestNode*, value, V8TestNode::hasInstance(info[0], info.GetIsolate()) ? V8TestNode::toNative(v8::Handle<v8::Object>::Cast(info[0])) : 0);
+    V8TRYCATCH_VOID(TestNode*, value, V8TestNode::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
     imp->convert1(value);
 }
 
 static void convert1MethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjV8Internal::convert1Method(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void convert2Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwTypeError(ExceptionMessages::failedToExecute("convert2", "TestObject", ExceptionMessages::notEnoughArguments(1, info.Length())), info.GetIsolate());
         return;
     }
     TestObj* imp = V8TestObject::toNative(info.Holder());
-    V8TRYCATCH_VOID(TestNode*, value, V8TestNode::hasInstance(info[0], info.GetIsolate()) ? V8TestNode::toNative(v8::Handle<v8::Object>::Cast(info[0])) : 0);
+    V8TRYCATCH_VOID(TestNode*, value, V8TestNode::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
     imp->convert2(value);
 }
 
 static void convert2MethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestObjV8Internal::convert2Method(info);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
@@ skipping 73 matching lines @@
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "V8Execution");
 }
 
 static void variadicNodeMethodMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         throwTypeError(ExceptionMessages::failedToExecute("variadicNodeMethod", "TestObject", ExceptionMessages::notEnoughArguments(1, info.Length())), info.GetIsolate());
         return;
     }
     TestObj* imp = V8TestObject::toNative(info.Holder());
-    V8TRYCATCH_VOID(Node*, head, V8Node::hasInstance(info[0], info.GetIsolate()) ? V8Node::toNative(v8::Handle<v8::Object>::Cast(info[0])) : 0);
+    V8TRYCATCH_VOID(Node*, head, V8Node::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
     Vector<RefPtr<Node> > tail;
     for (int i = 1; i < info.Length(); ++i) {
         if (!V8Node::hasInstance(info[i], info.GetIsolate())) {
             throwTypeError(ExceptionMessages::failedToExecute("variadicNodeMethod", "TestObject", "parameter 2 is not of type 'Node'."), info.GetIsolate());
             return;
         }
         tail.append(V8Node::toNative(v8::Handle<v8::Object>::Cast(info[i])));
     }
     imp->variadicNodeMethod(head, tail);
 }
@@ skipping 741 matching lines @@
     data->templateMap(currentWorldType).add(&wrapperTypeInfo, UnsafePersistent<v8::FunctionTemplate>(isolate, templ));
     return handleScope.Escape(templ);
 }
 
 bool V8TestObject::hasInstance(v8::Handle<v8::Value> jsValue, v8::Isolate* isolate)
 {
     return V8PerIsolateData::from(isolate)->hasInstanceInMainWorld(&wrapperTypeInfo, jsValue)
         || V8PerIsolateData::from(isolate)->hasInstanceInNonMainWorld(&wrapperTypeInfo, jsValue);
 }
 
+TestObj* V8TestObject::toNativeWithTypeCheck(v8::Isolate* isolate, v8::Handle<v8::Value> value)
+{
+    return hasInstance(value, isolate) ? fromInternalPointer(v8::Handle<v8::Object>::Cast(value)->GetAlignedPointerFromInternalField(v8DOMWrapperObjectIndex)) : 0;
+}
+
 void V8TestObject::installPerContextEnabledProperties(v8::Handle<v8::Object> instanceTemplate, TestObj* impl, v8::Isolate* isolate)
 {
     v8::Local<v8::Object> prototypeTemplate = v8::Local<v8::Object>::Cast(instanceTemplate->GetPrototype());
     if (ContextFeatures::featureNameEnabled(impl->document())) {
         static const V8DOMConfiguration::AttributeConfiguration attributeConfiguration =\
         {"enabledPerContextAttr", TestObjV8Internal::enabledPerContextAttrAttributeGetterCallback, TestObjV8Internal::enabledPerContextAttrAttributeSetterCallback, 0, 0, 0, static_cast<v8::AccessControl>(v8::DEFAULT), static_cast<v8::PropertyAttribute>(v8::None), 0 /* on instance */};
         V8DOMConfiguration::installAttribute(instanceTemplate, prototypeTemplate, attributeConfiguration, isolate);
     }
 }
 
@@ skipping 36 matching lines @@
     fromInternalPointer(object)->deref();
 }
 
 template<>
 v8::Handle<v8::Value> toV8NoInline(TestObj* impl, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
 {
     return toV8(impl, creationContext, isolate);
 }
 
 } // namespace WebCore