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

third_party/WebKit/Source/core/workers/DedicatedWorkerThread.h

Index: third_party/WebKit/Source/core/workers/DedicatedWorkerThread.h
diff --git a/third_party/WebKit/Source/core/workers/DedicatedWorkerThread.h b/third_party/WebKit/Source/core/workers/DedicatedWorkerThread.h
index 84ecd4e63884be3ed1eadeb4cc44b4f3578b4dd7..53470b9b60b97f759f149ac9351f90c1c32b5268 100644
--- a/third_party/WebKit/Source/core/workers/DedicatedWorkerThread.h
+++ b/third_party/WebKit/Source/core/workers/DedicatedWorkerThread.h
@@ -38,7 +38,7 @@ 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;
@@ -47,11 +47,11 @@ public:
     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;