Worker: Fix broken GC logic on Dedicated Worker while DOMTimer is set

third_party/WebKit/Source/core/workers/DedicatedWorkerThread.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 20 matching lines @@
 #define DedicatedWorkerThread_h
 
 #include "core/workers/WorkerThread.h"
 #include <memory>
 
 namespace blink {
 
 class InProcessWorkerObjectProxy;
 class WorkerThreadStartupData;
 
-class DedicatedWorkerThread final : public WorkerThread {
+class CORE_EXPORT DedicatedWorkerThread : public WorkerThread {
 public:
     static std::unique_ptr<DedicatedWorkerThread> create(PassRefPtr<WorkerLoaderProxy>, InProcessWorkerObjectProxy&, double timeOrigin);
     ~DedicatedWorkerThread() override;
 
     WorkerBackingThread& workerBackingThread() override { return *m_workerBackingThread; }
     void clearWorkerBackingThread() override;
     InProcessWorkerObjectProxy& workerObjectProxy() const { return m_workerObjectProxy; }
 
 protected:
+    DedicatedWorkerThread(PassRefPtr<WorkerLoaderProxy>, InProcessWorkerObjectProxy&, double timeOrigin);
     WorkerOrWorkletGlobalScope* createWorkerGlobalScope(std::unique_ptr<WorkerThreadStartupData>) override;
-    void postInitialize() override;
 
 private:
-    DedicatedWorkerThread(PassRefPtr<WorkerLoaderProxy>, InProcessWorkerObjectProxy&, double timeOrigin);
+    friend class DedicatedWorkerThreadForTest;
 
     std::unique_ptr<WorkerBackingThread> m_workerBackingThread;
     InProcessWorkerObjectProxy& m_workerObjectProxy;
     double m_timeOrigin;
 };
 
 } // namespace blink
 
 #endif // DedicatedWorkerThread_h