Removed local RefPtr objects created from PassRefPtr arguments.

third_party/WebKit/Source/core/loader/WorkerThreadableLoader.h

 /*
  * 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 123 matching lines @@
   // worker thread.
   class MainThreadLoaderHolder final
       : public GarbageCollectedFinalized<MainThreadLoaderHolder>,
         public ThreadableLoaderClient,
         public WorkerThreadLifecycleObserver {
     USING_GARBAGE_COLLECTED_MIXIN(MainThreadLoaderHolder);
     USING_PRE_FINALIZER(MainThreadLoaderHolder, Cancel);
 
    public:
     static void CreateAndStart(WorkerThreadableLoader*,
-                               PassRefPtr<WorkerLoaderProxy>,
+                               RefPtr<WorkerLoaderProxy>,
                                WorkerThreadLifecycleContext*,
                                std::unique_ptr<CrossThreadResourceRequestData>,
                                const ThreadableLoaderOptions&,
                                const ResourceLoaderOptions&,
                                PassRefPtr<WaitableEventWithTasks>);
     ~MainThreadLoaderHolder() override;
 
     void OverrideTimeout(unsigned long timeout_millisecond);
     void Cancel();
 
@@ skipping 62 matching lines @@
   ResourceLoaderOptions resource_loader_options_;
   BlockingBehavior blocking_behavior_;
 
   // |*m_mainThreadLoaderHolder| lives in the main thread.
   CrossThreadPersistent<MainThreadLoaderHolder> main_thread_loader_holder_;
 };
 
 }  // namespace blink
 
 #endif  // WorkerThreadableLoader_h