Make ThreadableLoader class to use references

Source/web/WebSharedWorkerImpl.cpp

 /*
  * Copyright (C) 2009 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 71 matching lines @@
         return adoptPtr(new Loader());
     }
 
     virtual ~Loader()
     {
         m_scriptLoader->setClient(0);
     }
 
     void load(ExecutionContext* loadingContext, const KURL& scriptURL, const Closure& receiveResponseCallback, const Closure& finishCallback)
     {
+        ASSERT(loadingContext);
         m_receiveResponseCallback = receiveResponseCallback;
         m_finishCallback = finishCallback;
         m_scriptLoader->setTargetType(ResourceRequest::TargetIsSharedWorker);
         m_scriptLoader->loadAsynchronously(
-            loadingContext, scriptURL, DenyCrossOriginRequests, this);
+            *loadingContext, scriptURL, DenyCrossOriginRequests, this);
     }
 
     void didReceiveResponse(unsigned long identifier, const ResourceResponse& response) OVERRIDE
     {
         m_identifier = identifier;
         m_appCacheID = response.appCacheID();
         m_receiveResponseCallback();
     }
 
     virtual void notifyFinished() OVERRIDE
@@ skipping 325 matching lines @@
     workerThread()->runLoop().postDebuggerTask(createCallbackTask(dispatchOnInspectorBackendTask, String(message)));
     WorkerDebuggerAgent::interruptAndDispatchInspectorCommands(workerThread());
 }
 
 WebSharedWorker* WebSharedWorker::create(WebSharedWorkerClient* client)
 {
     return new WebSharedWorkerImpl(client);
 }
 
 } // namespace blink