[Oilpan] Apply RefCountedGarbageCollectedEventTarget on AbstractWorker

Source/modules/serviceworkers/ServiceWorkerContainer.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 361 matching lines @@
         dispatchEvent(Event::create(EventTypeNames::controllerchange));
 }
 
 void ServiceWorkerContainer::dispatchMessageEvent(WebServiceWorker* serviceWorker, const WebString& message, const WebMessagePortChannelArray& webChannels)
 {
     if (!executionContext() || !executionContext()->executingWindow())
         return;
 
     MessagePortArray* ports = MessagePort::toMessagePortArray(executionContext(), webChannels);
     RefPtr<SerializedScriptValue> value = SerializedScriptValueFactory::instance().createFromWire(message);
-    RefPtrWillBeRawPtr<ServiceWorker> source = ServiceWorker::from(executionContext(), serviceWorker);
+    ServiceWorker* source = ServiceWorker::from(executionContext(), serviceWorker);
     dispatchEvent(ServiceWorkerMessageEvent::create(ports, value, source, executionContext()->securityOrigin()->toString()));
 }
 
 const AtomicString& ServiceWorkerContainer::interfaceName() const
 {
     return EventTargetNames::ServiceWorkerContainer;
 }
 
 ServiceWorkerContainer::ServiceWorkerContainer(ExecutionContext* executionContext)
     : ContextLifecycleObserver(executionContext)
     , m_provider(0)
 {
 
     if (!executionContext)
         return;
 
     if (ServiceWorkerContainerClient* client = ServiceWorkerContainerClient::from(executionContext)) {
         m_provider = client->provider();
         if (m_provider)
             m_provider->setClient(this);
     }
 }
 
 } // namespace blink