Skip expensive hasInstance() type-checks in overloads

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 330 matching lines @@
         V8ThrowException::throwException(createMinimumArityTypeErrorForMethod("voidMethodTestInterfaceEmptyArg", "TestInterface5", 1, info.Length(), info.GetIsolate()), info.GetIsolate());
         return;
     }
     TestInterface5Implementation* impl = V8TestInterface5::toImpl(info.Holder());
     TestInterfaceEmpty* testInterfaceEmptyArg;
     {
         if (info.Length() > 0 && !V8TestInterfaceEmpty::hasInstance(info[0], info.GetIsolate())) {
             V8ThrowException::throwTypeError(ExceptionMessages::failedToExecute("voidMethodTestInterfaceEmptyArg", "TestInterface5", "parameter 1 is not of type 'TestInterfaceEmpty'."), info.GetIsolate());
             return;
         }
-        testInterfaceEmptyArg = V8TestInterfaceEmpty::toImpl(v8::Handle<v8::Object>::Cast(info[0]));
+        testInterfaceEmptyArg = V8TestInterfaceEmpty::toImplWithTypeCheck(info.GetIsolate(), info[0]);
     }
     impl->voidMethodTestInterfaceEmptyArg(testInterfaceEmptyArg);
 }
 
 static void voidMethodTestInterfaceEmptyArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
     TestInterface5ImplementationV8Internal::voidMethodTestInterfaceEmptyArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
@@ skipping 514 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)