Make ScriptPromiseResolver RefCountedWillBeRefCountedGarbageCollected.

Source/modules/push_messaging/PushRegistration.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.
 
 #include "config.h"
 #include "modules/push_messaging/PushRegistration.h"
 
 #include "bindings/core/v8/CallbackPromiseAdapter.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "modules/push_messaging/PushError.h"
@@ skipping 22 matching lines @@
     , m_serviceWorkerRegistration(registration)
 {
 }
 
 PushRegistration::~PushRegistration()
 {
 }
 
 ScriptPromise PushRegistration::unregister(ScriptState* scriptState)
 {
-    RefPtr<ScriptPromiseResolver> resolver = ScriptPromiseResolver::create(scriptState);
+    RefPtrWillBeRawPtr<ScriptPromiseResolver> resolver = ScriptPromiseResolver::create(scriptState);
     ScriptPromise promise = resolver->promise();
 
     WebPushProvider* webPushProvider = Platform::current()->pushProvider();
     ASSERT(webPushProvider);
 
     webPushProvider->unregister(m_serviceWorkerRegistration->webRegistration(), new CallbackPromiseAdapter<bool, PushError>(resolver));
     return promise;
 }
 
 void PushRegistration::trace(Visitor* visitor)
 {
     visitor->trace(m_serviceWorkerRegistration);
 }
 
 } // namespace blink