workers: Rename WorkerThread to WorkerScript.

Source/web/WebEmbeddedWorkerImpl.h

Index: Source/web/WebEmbeddedWorkerImpl.h
diff --git a/Source/web/WebEmbeddedWorkerImpl.h b/Source/web/WebEmbeddedWorkerImpl.h
index 4a278dd4802e0aada910f82166b02162bda14ec3..d0179d57963158831c89329f3be9971ba27fd672 100644
--- a/Source/web/WebEmbeddedWorkerImpl.h
+++ b/Source/web/WebEmbeddedWorkerImpl.h
@@ -46,7 +46,7 @@ class WebLocalFrameImpl;
 class WebServiceWorkerNetworkProvider;
 class WebView;
 class WorkerInspectorProxy;
-class WorkerThread;
+class WorkerScript;
 
 class WebEmbeddedWorkerImpl final
     : public WebEmbeddedWorker
@@ -91,7 +91,7 @@ private:
     virtual void resumeStartup() override;
 
     void onScriptLoaderFinished();
-    void startWorkerThread();
+    void startWorkerScript();
 
     // WorkerLoaderProxyProvider
     virtual void postTaskToLoader(PassOwnPtr<ExecutionContextTask>) override;
@@ -112,7 +112,7 @@ private:
     // Kept around only while main script loading is ongoing.
     OwnPtr<Loader> m_mainScriptLoader;
 
-    RefPtr<WorkerThread> m_workerThread;
+    RefPtr<WorkerScript> m_workerScript;
     RefPtr<WorkerLoaderProxy> m_loaderProxy;
     OwnPtr<ServiceWorkerGlobalScopeProxy> m_workerGlobalScopeProxy;
     OwnPtr<WorkerInspectorProxy> m_workerInspectorProxy;