workers: Rename WorkerThread to WorkerScript.

Source/core/workers/WorkerMessagingProxy.h

Index: Source/core/workers/WorkerMessagingProxy.h
diff --git a/Source/core/workers/WorkerMessagingProxy.h b/Source/core/workers/WorkerMessagingProxy.h
index 37a71ff06729d12e5adef48385c14f6cb2d48a2c..b4acc43d8236e78f85534541ef1030dc82a8e8ee 100644
--- a/Source/core/workers/WorkerMessagingProxy.h
+++ b/Source/core/workers/WorkerMessagingProxy.h
@@ -41,7 +41,7 @@
 namespace blink {
 
 class WorkerObjectProxy;
-class WorkerThread;
+class WorkerScript;
 class ExecutionContext;
 class InProcessWorkerBase;
 class WorkerClients;
@@ -71,15 +71,15 @@ public:
     void confirmMessageFromWorkerObject(bool hasPendingActivity);
     void reportPendingActivity(bool hasPendingActivity);
     void workerGlobalScopeClosed();
-    void workerThreadTerminated();
+    void workerScriptTerminated();
 
-    void workerThreadCreated(PassRefPtr<WorkerThread>);
+    void workerScriptCreated(PassRefPtr<WorkerScript>);
 
 protected:
     WorkerMessagingProxy(InProcessWorkerBase*, PassOwnPtrWillBeRawPtr<WorkerClients>);
     virtual ~WorkerMessagingProxy();
 
-    virtual PassRefPtr<WorkerThread> createWorkerThread(double originTime, PassOwnPtr<WorkerThreadStartupData>) = 0;
+    virtual PassRefPtr<WorkerScript> createWorkerScript(double originTime, PassOwnPtr<WorkerScriptStartupData>) = 0;
 
     PassRefPtr<WorkerLoaderProxy> loaderProxy() { return m_loaderProxy; }
     WorkerObjectProxy& workerObjectProxy() { return *m_workerObjectProxy.get(); }
@@ -98,10 +98,10 @@ private:
     OwnPtr<WorkerObjectProxy> m_workerObjectProxy;
     InProcessWorkerBase* m_workerObject;
     bool m_mayBeDestroyed;
-    RefPtr<WorkerThread> m_workerThread;
+    RefPtr<WorkerScript> m_workerScript;
 
     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_workerScriptHadPendingActivity; // The latest confirmation from worker thread reported that it was still active.
 
     bool m_askedToTerminate;