JS binding: remove redundant type check in attr setter for TypeChecking interface

Source/bindings/tests/results/modules/V8TestInterface5.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"
 #if ENABLE(CONDITION)
 #include "V8TestInterface5.h"
 
@@ skipping 40 matching lines @@
 static void testInterfaceAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     ExceptionState exceptionState(ExceptionState::SetterContext, "testInterfaceAttribute", "TestInterface5", holder, info.GetIsolate());
     if (!V8TestInterface5::hasInstance(v8Value, info.GetIsolate())) {
         exceptionState.throwTypeError("The provided value is not of type 'TestInterface5'.");
         exceptionState.throwIfNeeded();
         return;
     }
     TestInterface5Implementation* impl = V8TestInterface5::toImpl(holder);
-    TestInterface5Implementation* cppValue = V8TestInterface5::toImplWithTypeCheck(info.GetIsolate(), v8Value);
+    TestInterface5Implementation* cppValue = V8TestInterface5::toImpl(v8::Handle<v8::Object>::Cast(v8Value));
     impl->setTestInterfaceAttribute(WTF::getPtr(cppValue));
 }
 
 static void testInterfaceAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestInterface5ImplementationV8Internal::testInterfaceAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
@@ skipping 804 matching lines @@
 }
 
 template<>
 v8::Handle<v8::Value> toV8NoInline(TestInterface5Implementation* impl, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
 {
     return toV8(impl, creationContext, isolate);
 }
 
 } // namespace blink
 #endif // ENABLE(CONDITION)