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

Source/bindings/tests/results/core/V8TestInterface3.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 "V8TestInterface3.h"
 
 #include "bindings/core/v8/ExceptionState.h"
@@ skipping 76 matching lines @@
     }
     Document* document;
     double d;
     {
         document = V8Document::toImplWithTypeCheck(info.GetIsolate(), info[0]);
         if (!document) {
             exceptionState.throwTypeError("parameter 1 is not of type 'Document'.");
             exceptionState.throwIfNeeded();
             return;
         }
-        TONATIVE_VOID_EXCEPTIONSTATE_INTERNAL(d, toRestrictedDouble(info[1], exceptionState), exceptionState);
+        TONATIVE_CONVERT(convertAndThrow(d = toRestrictedDouble(info[1], exceptionState), exceptionState), return);
     }
     TestPartialInterface4::voidMethodDocument(document, d);
 }
 #endif // ENABLE(BAR)
 
 #if ENABLE(BAR)
 static void voidMethodDocumentMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
     TestInterface3V8Internal::voidMethodDocumentMethod(info);
@@ skipping 48 matching lines @@
         setMinimumArityTypeError(exceptionState, 1, info.Length());
         exceptionState.throwIfNeeded();
         return;
     }
     TestInterface3* impl = V8TestInterface3::toImpl(info.Holder());
     ScriptValue callback;
     ScriptValue thisArg;
     {
         if (!info[0]->IsFunction()) {
             exceptionState.throwTypeError("The callback provided as parameter 1 is not a function.");
-                exceptionState.throwIfNeeded();
+            exceptionState.throwIfNeeded();
             return;
         }
         callback = ScriptValue(ScriptState::current(info.GetIsolate()), info[0]);
         thisArg = ScriptValue(ScriptState::current(info.GetIsolate()), info[1]);
     }
     ScriptState* scriptState = ScriptState::current(info.GetIsolate());
     impl->forEachForBinding(scriptState, ScriptValue(scriptState, info.This()), callback, thisArg, exceptionState);
     if (exceptionState.hadException()) {
         exceptionState.throwIfNeeded();
         return;
@@ skipping 173 matching lines @@
 {
     scriptWrappable->toImpl<TestInterface3>()->ref();
 }
 
 void V8TestInterface3::derefObject(ScriptWrappable* scriptWrappable)
 {
     scriptWrappable->toImpl<TestInterface3>()->deref();
 }
 
 } // namespace blink