Terminate and wait the worker thread in ~WebEmbeddedWorkerImpl()

Source/core/workers/WorkerThread.h

 /*
  * 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 51 matching lines @@
     virtual ~WorkerThread();
 
     virtual void start();
     virtual void stop();
 
     // Can be used to wait for this worker thread to shut down.
     // (This is signalled on the main thread, so it's assumed to be waited on the worker context thread)
     WebWaitableEvent* shutdownEvent() { return m_shutdownEvent.get(); }
 
     WebWaitableEvent* terminationEvent() { return m_terminationEvent.get(); }
+    void terminateAndWait();
     static void terminateAndWaitForAllWorkers();
 
     bool isCurrentThread() const;
     WorkerLoaderProxy& workerLoaderProxy() const { return m_workerLoaderProxy; }
     WorkerReportingProxy& workerReportingProxy() const { return m_workerReportingProxy; }
 
     void postTask(PassOwnPtr<ExecutionContextTask>);
     void postDebuggerTask(PassOwnPtr<ExecutionContextTask>);
 
     enum WaitMode { WaitForMessage, DontWaitForMessage };
@@ skipping 60 matching lines @@
     // WorkerThread might get deleted before it had a chance to properly
     // shut down. By deleting the WebThread first, we can guarantee that
     // no pending tasks on the thread might want to access any of the other
     // members during the WorkerThread's destruction.
     OwnPtr<WebThreadSupportingGC> m_thread;
 };
 
 } // namespace blink
 
 #endif // WorkerThread_h