Revert of Change WokerThread to use a blink::WebThread

Source/core/workers/WorkerThread.h

Index: Source/core/workers/WorkerThread.h
diff --git a/Source/core/workers/WorkerThread.h b/Source/core/workers/WorkerThread.h
index 2dccd35e0ef97c02496a1b0fbd1cd4b56e8d8264..deb0028e77ccda3d21b431cfbdad5558145386a4 100644
--- a/Source/core/workers/WorkerThread.h
+++ b/Source/core/workers/WorkerThread.h
@@ -27,14 +27,10 @@
 #ifndef WorkerThread_h
 #define WorkerThread_h
 
-#include "core/dom/ExecutionContextTask.h"
 #include "core/frame/csp/ContentSecurityPolicy.h"
-#include "core/workers/WorkerGlobalScope.h"
-#include "platform/SharedTimer.h"
+#include "core/workers/WorkerRunLoop.h"
 #include "platform/weborigin/SecurityOrigin.h"
-#include "public/platform/WebThread.h"
 #include "wtf/Forward.h"
-#include "wtf/MessageQueue.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
@@ -47,49 +43,39 @@
 
     class KURL;
     class WorkerGlobalScope;
-    class WorkerInspectorController;
     class WorkerLoaderProxy;
     class WorkerReportingProxy;
-    class WorkerSharedTimer;
-    class WorkerThreadShutdownFinishTask;
     class WorkerThreadStartupData;
-    class WorkerThreadTask;
+    class WorkerInspectorController;
 
     enum WorkerThreadStartMode { DontPauseWorkerGlobalScopeOnStart, PauseWorkerGlobalScopeOnStart };
-
 
     class WorkerThread : public RefCounted<WorkerThread> {
     public:
         virtual ~WorkerThread();
 
-        virtual void start();
-        virtual void stop();
+        bool start();
+        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)
         blink::WebWaitableEvent* shutdownEvent() { return m_shutdownEvent.get(); }
 
         bool isCurrentThread() const;
+        WorkerRunLoop& runLoop() { return m_runLoop; }
         WorkerLoaderProxy& workerLoaderProxy() const { return m_workerLoaderProxy; }
         WorkerReportingProxy& workerReportingProxy() const { return m_workerReportingProxy; }
 
         void postTask(PassOwnPtr<ExecutionContextTask>);
         void postDebuggerTask(PassOwnPtr<ExecutionContextTask>);
 
-        enum WaitMode { WaitForMessage, DontWaitForMessage };
-        MessageQueueWaitResult runDebuggerTask(WaitMode = WaitForMessage);
-
-        // These methods should be called if the holder of the thread is
-        // going to call runDebuggerTask in a loop.
-        void willEnterNestedLoop();
-        void didLeaveNestedLoop();
-
-        blink::WebThread* webThread() { return m_thread.get(); }
-        WorkerGlobalScope* workerGlobalScope() const { return m_workerGlobalScope.get(); }
-        bool terminated() const { return m_terminated; }
+        MessageQueueWaitResult runDebuggerTask(WorkerRunLoop::WaitMode = WorkerRunLoop::WaitForMessage);
+        bool terminated() { return m_runLoop.terminated(); }
 
         // Number of active worker threads.
         static unsigned workerThreadCount();
+
+        WorkerGlobalScope* workerGlobalScope() { return m_workerGlobalScope.get(); }
 
         void interruptAndDispatchInspectorCommands();
         void setWorkerInspectorController(WorkerInspectorController*);
@@ -100,31 +86,27 @@
         // Factory method for creating a new worker context for the thread.
         virtual PassRefPtrWillBeRawPtr<WorkerGlobalScope> createWorkerGlobalScope(PassOwnPtrWillBeRawPtr<WorkerThreadStartupData>) = 0;
 
-        virtual void postInitialize() { }
+        // Executes the event loop for the worker thread. Derived classes can override to perform actions before/after entering the event loop.
+        virtual void runEventLoop();
 
     private:
-        friend class WorkerThreadShutdownFinishTask;
+        // Static function executed as the core routine on the new thread. Passed a pointer to a WorkerThread object.
+        static void workerThreadStart(void*);
 
-        void initialize();
-        void cleanup();
-        void idleHandler();
+        void workerThread();
 
-        bool m_terminated;
-        OwnPtr<blink::WebThread> m_thread;
-        OwnPtr<WorkerSharedTimer> m_sharedTimer;
-        MessageQueue<WorkerThreadTask> m_debuggerMessageQueue;
-
+        ThreadIdentifier m_threadID;
+        WorkerRunLoop m_runLoop;
         WorkerLoaderProxy& m_workerLoaderProxy;
         WorkerReportingProxy& m_workerReportingProxy;
+
+        RefPtrWillBePersistent<WorkerGlobalScope> m_workerGlobalScope;
+        Mutex m_threadCreationMutex;
 
         RefPtrWillBePersistent<WorkerInspectorController> m_workerInspectorController;
         Mutex m_workerInspectorControllerMutex;
 
-        Mutex m_threadCreationMutex;
-        RefPtrWillBePersistent<WorkerGlobalScope> m_workerGlobalScope;
         OwnPtrWillBePersistent<WorkerThreadStartupData> m_startupData;
-
-        OwnPtr<WeakPtrFactory<WorkerThread> > m_weakFactory;
 
         // Used to signal thread shutdown.
         OwnPtr<blink::WebWaitableEvent> m_shutdownEvent;