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

Source/bindings/tests/results/core/V8TestSpecialOperations.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 "V8TestSpecialOperations.h"
 
 #include "bindings/core/v8/ExceptionState.h"
@@ skipping 27 matching lines @@
 
 static void namedItemMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (UNLIKELY(info.Length() < 1)) {
         V8ThrowException::throwException(createMinimumArityTypeErrorForMethod(info.GetIsolate(), "namedItem", "TestSpecialOperations", 1, info.Length()), info.GetIsolate());
         return;
     }
     TestSpecialOperations* impl = V8TestSpecialOperations::toImpl(info.Holder());
     V8StringResource<> name;
     {
-        TOSTRING_VOID_INTERNAL(name, info[0]);
+        name = info[0];
+        if (!name.prepare())
+            return;
     }
     NodeOrNodeList result;
     impl->getItem(name, result);
     v8SetReturnValue(info, result);
 }
 
 static void namedItemMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
     TestSpecialOperationsV8Internal::namedItemMethod(info);
@@ skipping 20 matching lines @@
     TestSpecialOperationsV8Internal::namedPropertyGetter(name, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void namedPropertySetter(v8::Local<v8::Name> name, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     if (!name->IsString())
         return;
     auto nameString = name.As<v8::String>();
     TestSpecialOperations* impl = V8TestSpecialOperations::toImpl(info.Holder());
-    TOSTRING_VOID(V8StringResource<>, propertyName, nameString);
+    V8StringResource<> propertyName(nameString);
+    if (!propertyName.prepare())
+        return;
     Node* propertyValue = V8Node::toImplWithTypeCheck(info.GetIsolate(), v8Value);
     if (!propertyValue && !isUndefinedOrNull(v8Value)) {
         exceptionState.throwTypeError("The provided value is not of type 'Node'.");
         exceptionState.throwIfNeeded();
         return;
     }
     bool result = impl->anonymousNamedSetter(propertyName, propertyValue);
     if (!result)
         return;
     v8SetReturnValue(info, v8Value);
@@ skipping 102 matching lines @@
 {
     scriptWrappable->toImpl<TestSpecialOperations>()->ref();
 }
 
 void V8TestSpecialOperations::derefObject(ScriptWrappable* scriptWrappable)
 {
     scriptWrappable->toImpl<TestSpecialOperations>()->deref();
 }
 
 } // namespace blink