Replaced PassRefPtr copies with moves in Source/core.

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

 /*
  * Copyright (C) 2009, 2010 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 413 matching lines @@
     std::unique_ptr<CrossThreadResourceRequestData> request,
     const ThreadableLoaderOptions& options,
     const ResourceLoaderOptions& resourceLoaderOptions,
     PassRefPtr<WaitableEventWithTasks> eventWithTasks,
     ExecutionContext* executionContext)
 {
     DCHECK(isMainThread());
     TaskForwarder* forwarder;
     RefPtr<WorkerLoaderProxy> loaderProxy = passLoaderProxy;
     if (eventWithTasks)
-        forwarder = new SyncTaskForwarder(eventWithTasks);
+        forwarder = new SyncTaskForwarder(std::move(eventWithTasks));
     else
         forwarder = new AsyncTaskForwarder(loaderProxy);
 
     MainThreadLoaderHolder* mainThreadLoaderHolder = new MainThreadLoaderHolder(forwarder, workerThreadLifecycleContext);
     if (mainThreadLoaderHolder->wasContextDestroyedBeforeObserverCreation()) {
         // The thread is already terminating.
         forwarder->abort();
         mainThreadLoaderHolder->m_forwarder = nullptr;
         return;
     }
@@ skipping 151 matching lines @@
     const ResourceLoaderOptions& originalResourceLoaderOptions)
 {
     DCHECK(isMainThread());
     ResourceLoaderOptions resourceLoaderOptions = originalResourceLoaderOptions;
     resourceLoaderOptions.requestInitiatorContext = WorkerContext;
     m_mainThreadLoader = DocumentThreadableLoader::create(document, this, options, resourceLoaderOptions);
     m_mainThreadLoader->start(ResourceRequest(request.get()));
 }
 
 } // namespace blink