IDL: Drop value conversion (V8 -> C++) macros from generated code

Source/bindings/tests/results/core/V8TestInterfaceEventInitConstructor.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 "V8TestInterfaceEventInitConstructor.h"
 
 #include "bindings/core/v8/ExceptionState.h"
@@ skipping 38 matching lines @@
 {
     ExceptionState exceptionState(ExceptionState::ConstructionContext, "TestInterfaceEventInitConstructor", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 2)) {
         setMinimumArityTypeError(exceptionState, 2, info.Length());
         exceptionState.throwIfNeeded();
         return;
     }
     V8StringResource<> type;
     TestInterfaceEventInit testInterfaceEventInit;
     {
-        TOSTRING_VOID_INTERNAL(type, info[0]);
+        TONATIVE_CONVERT((type = info[0]).prepare(), return);
         if (!isUndefinedOrNull(info[1]) && !info[1]->IsObject()) {
             exceptionState.throwTypeError("parameter 2 ('testInterfaceEventInit') is not an object.");
             exceptionState.throwIfNeeded();
             return;
         }
-        TONATIVE_VOID_EXCEPTIONSTATE_ARGINTERNAL(V8TestInterfaceEventInit::toImpl(info.GetIsolate(), info[1], testInterfaceEventInit, exceptionState), exceptionState);
+        TONATIVE_CONVERT(V8TestInterfaceEventInit::toImpl(info.GetIsolate(), info[1], testInterfaceEventInit, exceptionState), return exceptionState.throwException());
     }
     RefPtrWillBeRawPtr<TestInterfaceEventInitConstructor> impl = TestInterfaceEventInitConstructor::create(type, testInterfaceEventInit);
     v8::Local<v8::Object> wrapper = info.Holder();
     impl->associateWithWrapper(info.GetIsolate(), &V8TestInterfaceEventInitConstructor::wrapperTypeInfo, wrapper);
     v8SetReturnValue(info, wrapper);
 }
 
 } // namespace TestInterfaceEventInitConstructorV8Internal
 
 static const V8DOMConfiguration::AttributeConfiguration V8TestInterfaceEventInitConstructorAttributes[] = {
@@ skipping 64 matching lines @@
 }
 
 void V8TestInterfaceEventInitConstructor::derefObject(ScriptWrappable* scriptWrappable)
 {
 #if !ENABLE(OILPAN)
     scriptWrappable->toImpl<TestInterfaceEventInitConstructor>()->deref();
 #endif
 }
 
 } // namespace blink