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

Source/core/workers/WorkerThread.cpp

 /*
  * Copyright (C) 2008 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 72 matching lines @@
 
 unsigned WorkerThread::workerThreadCount()
 {
     MutexLocker lock(threadSetMutex());
     return workerThreads().size();
 }
 
 class WorkerThreadCancelableTask final : public ExecutionContextTask {
     WTF_MAKE_NONCOPYABLE(WorkerThreadCancelableTask); WTF_MAKE_FAST_ALLOCATED;
 public:
-    static PassOwnPtr<WorkerThreadCancelableTask> create(const Closure& closure)
+    static PassOwnPtr<WorkerThreadCancelableTask> create(PassOwnPtr<Closure> closure)
     {
         return adoptPtr(new WorkerThreadCancelableTask(closure));
     }
 
     virtual void performTask(ExecutionContext*) override
     {
         if (!m_taskCanceled)
-            m_closure();
+            (*m_closure)();
     }
 
     void cancelTask() { m_taskCanceled = true; }
 
 private:
-    explicit WorkerThreadCancelableTask(const Closure& closure)
+    explicit WorkerThreadCancelableTask(PassOwnPtr<Closure> closure)
     : m_closure(closure)
     , m_taskCanceled(false)
     { }
 
-    Closure m_closure;
+    OwnPtr<Closure> m_closure;
     bool m_taskCanceled;
 };
 
 class WorkerSharedTimer : public SharedTimer {
 public:
     explicit WorkerSharedTimer(WorkerThread* workerThread)
         : m_workerThread(workerThread)
         , m_nextFireTime(0.0)
         , m_running(false)
         , m_lastQueuedTask(nullptr)
@@ skipping 410 matching lines @@
     InspectorInstrumentation::didLeaveNestedRunLoop(m_workerGlobalScope.get());
 }
 
 void WorkerThread::setWorkerInspectorController(WorkerInspectorController* workerInspectorController)
 {
     MutexLocker locker(m_workerInspectorControllerMutex);
     m_workerInspectorController = workerInspectorController;
 }
 
 } // namespace blink