Change the return type of WTF::bind() to |OwnPtr<Function>|

Source/web/WebEmbeddedWorkerImpl.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 61 matching lines @@
     static PassOwnPtr<Loader> create()
     {
         return adoptPtr(new Loader());
     }
 
     virtual ~Loader()
     {
         m_scriptLoader->setClient(0);
     }
 
-    void load(ExecutionContext* loadingContext, const KURL& scriptURL, const Closure& callback)
+    void load(ExecutionContext* loadingContext, const KURL& scriptURL, PassOwnPtr<Closure> callback)
     {
         ASSERT(loadingContext);
         m_callback = callback;
         m_scriptLoader->setRequestContext(WebURLRequest::RequestContextServiceWorker);
         m_scriptLoader->loadAsynchronously(
             *loadingContext, scriptURL, DenyCrossOriginRequests, this);
     }
 
     virtual void notifyFinished() override
     {
-        m_callback();
+        (*m_callback)();
     }
 
     void cancel()
     {
         m_scriptLoader->cancel();
     }
 
     bool failed() const { return m_scriptLoader->failed(); }
     const KURL& url() const { return m_scriptLoader->responseURL(); }
     String script() const { return m_scriptLoader->script(); }
 
 private:
     Loader() : m_scriptLoader(WorkerScriptLoader::create())
     {
     }
 
     RefPtr<WorkerScriptLoader> m_scriptLoader;
-    Closure m_callback;
+    OwnPtr<Closure> m_callback;
 };
 
 class WebEmbeddedWorkerImpl::LoaderProxy : public WorkerLoaderProxy {
 public:
     static PassOwnPtr<LoaderProxy> create(WebEmbeddedWorkerImpl& embeddedWorker)
     {
         return adoptPtr(new LoaderProxy(embeddedWorker));
     }
 
     virtual void postTaskToLoader(PassOwnPtr<ExecutionContextTask> task) override
@@ skipping 301 matching lines @@
     m_mainScriptLoader.clear();
 
     m_workerGlobalScopeProxy = ServiceWorkerGlobalScopeProxy::create(*this, *document, *m_workerContextClient);
     m_loaderProxy = LoaderProxy::create(*this);
     m_workerThread = ServiceWorkerThread::create(*m_loaderProxy, *m_workerGlobalScopeProxy, startupData.release());
     m_workerThread->start();
     m_workerInspectorProxy->workerThreadCreated(document, m_workerThread.get(), scriptURL);
 }
 
 } // namespace blink