IDL: Use Nullable for union type return value

Source/bindings/tests/results/V8TestTypedefs.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 "V8TestTypedefs.h"
 
 #include "bindings/core/v8/ExceptionState.h"
@@ skipping 178 matching lines @@
 static void uLongLongMethodTestInterfaceEmptyTypeSequenceArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
     TestTypedefsV8Internal::uLongLongMethodTestInterfaceEmptyTypeSequenceArgMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void testInterfaceOrTestInterfaceEmptyMethodMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TestTypedefs* impl = V8TestTypedefs::toNative(info.Holder());
-    bool result0Enabled = false;
-    RefPtr<TestInterfaceImplementation> result0;
-    bool result1Enabled = false;
-    RefPtr<TestInterfaceEmpty> result1;
-    impl->testInterfaceOrTestInterfaceEmptyMethod(result0Enabled, result0, result1Enabled, result1);
-    if (result0Enabled) {
-        v8SetReturnValue(info, result0.release());
+    Nullable<RefPtr<TestInterfaceImplementation> > result0;
+    Nullable<RefPtr<TestInterfaceEmpty> > result1;
+    impl->testInterfaceOrTestInterfaceEmptyMethod(result0, result1);
+    if (!result0.isNull()) {
+        v8SetReturnValue(info, result0.get().release());
         return;
     }
-    if (result1Enabled) {
-        v8SetReturnValue(info, result1.release());
+    if (!result1.isNull()) {
+        v8SetReturnValue(info, result1.get().release());
         return;
     }
     v8SetReturnValueNull(info);
 }
 
 static void testInterfaceOrTestInterfaceEmptyMethodMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
     TestTypedefsV8Internal::testInterfaceOrTestInterfaceEmptyMethodMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
@@ skipping 165 matching lines @@
     fromInternalPointer(internalPointer)->deref();
 }
 
 template<>
 v8::Handle<v8::Value> toV8NoInline(TestTypedefs* impl, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
 {
     return toV8(impl, creationContext, isolate);
 }
 
 } // namespace blink