IDL: Merge duplicating local variable assignment in attribute_getter

Source/bindings/tests/results/V8TestInterface.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 "V8TestInterface.h"
 
@@ skipping 342 matching lines @@
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestInterfaceImplementationV8Internal::implementsNodeAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void implementsEventHandlerAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestInterfaceImplementation* impl = V8TestInterface::toNative(holder);
-    EventListener* v8Value = impl->implementsEventHandlerAttribute();
-    v8SetReturnValue(info, v8Value ? v8::Handle<v8::Value>(V8AbstractEventListener::cast(v8Value)->getListenerObject(impl->executionContext())) : v8::Handle<v8::Value>(v8::Null(info.GetIsolate())));
+    EventListener* cppValue(impl->implementsEventHandlerAttribute());
+    v8SetReturnValue(info, cppValue ? v8::Handle<v8::Value>(V8AbstractEventListener::cast(cppValue)->getListenerObject(impl->executionContext())) : v8::Handle<v8::Value>(v8::Null(info.GetIsolate())));
 }
 
 static void implementsEventHandlerAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestInterfaceImplementationV8Internal::implementsEventHandlerAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void implementsEventHandlerAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
@@ skipping 1173 matching lines @@
 }
 
 template<>
 v8::Handle<v8::Value> toV8NoInline(TestInterfaceImplementation* impl, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
 {
     return toV8(impl, creationContext, isolate);
 }
 
 } // namespace WebCore
 #endif // ENABLE(CONDITION)