FYI: Compile fixes when always using a local for method return value

Source/bindings/tests/results/V8TestException.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 "V8TestException.h"
 
 #include "bindings/core/v8/ExceptionState.h"
@@ skipping 55 matching lines @@
 static void readonlyStringAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestExceptionV8Internal::readonlyStringAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void toStringMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TestException* impl = V8TestException::toNative(info.Holder());
-    v8SetReturnValueString(info, impl->toString(), info.GetIsolate());
+    String result = impl->toString();
+    v8SetReturnValueString(info, result, info.GetIsolate());
 }
 
 static void toStringMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
     TestExceptionV8Internal::toStringMethod(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 } // namespace TestExceptionV8Internal
@@ skipping 80 matching lines @@
     fromInternalPointer(object)->deref();
 }
 
 template<>
 v8::Handle<v8::Value> toV8NoInline(TestException* impl, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
 {
     return toV8(impl, creationContext, isolate);
 }
 
 } // namespace WebCore