Make ThreadableLoader class to use references

Source/core/workers/Worker.cpp

Index: Source/core/workers/Worker.cpp
diff --git a/Source/core/workers/Worker.cpp b/Source/core/workers/Worker.cpp
index 12442f1fa2c245a67a0163976b45d03a59cd376c..1b045cce7c21181b0557e046c12b099d1f1955af 100644
--- a/Source/core/workers/Worker.cpp
+++ b/Source/core/workers/Worker.cpp
@@ -74,7 +74,7 @@ PassRefPtrWillBeRawPtr<Worker> Worker::create(ExecutionContext* context, const S
     worker->setPendingActivity(worker.get());
 
     worker->m_scriptLoader = WorkerScriptLoader::create();
-    worker->m_scriptLoader->loadAsynchronously(context, scriptURL, DenyCrossOriginRequests, worker.get());
+    worker->m_scriptLoader->loadAsynchronously(*context, scriptURL, DenyCrossOriginRequests, worker.get());
     worker->m_contextProxy = proxyProvider->createWorkerGlobalScopeProxy(worker.get());
     return worker.release();
 }