DevTools: Do not push to frontend messages from worker while it is alive

Source/core/workers/WorkerMessagingProxy.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 68 matching lines @@
     virtual void postTaskToLoader(PassOwnPtr<ExecutionContextTask>) OVERRIDE;
     virtual bool postTaskToWorkerGlobalScope(PassOwnPtr<ExecutionContextTask>) OVERRIDE;
 
     void workerThreadCreated(PassRefPtr<DedicatedWorkerThread>);
 
 protected:
     virtual ~WorkerMessagingProxy();
 
 private:
     static void workerObjectDestroyedInternal(ExecutionContext*, WorkerMessagingProxy*);
+    void terminateInternally();
 
     RefPtrWillBePersistent<ExecutionContext> m_executionContext;
     OwnPtr<WorkerObjectProxy> m_workerObjectProxy;
     Worker* m_workerObject;
     bool m_mayBeDestroyed;
     RefPtr<DedicatedWorkerThread> m_workerThread;
 
     unsigned m_unconfirmedMessageCount; // Unconfirmed messages from worker object to worker thread.
     bool m_workerThreadHadPendingActivity; // The latest confirmation from worker thread reported that it was still active.
 
     bool m_askedToTerminate;
 
     Vector<OwnPtr<ExecutionContextTask> > m_queuedEarlyTasks; // Tasks are queued here until there's a thread object created.
     WorkerGlobalScopeProxy::PageInspector* m_pageInspector;
 
     OwnPtrWillBePersistent<WorkerClients> m_workerClients;
 };
 
 } // namespace blink
 
 #endif // WorkerMessagingProxy_h