Fix virtual/override/final usage in the rest of Source/core/.

Source/core/workers/DedicatedWorkerGlobalScope.h

Index: Source/core/workers/DedicatedWorkerGlobalScope.h
diff --git a/Source/core/workers/DedicatedWorkerGlobalScope.h b/Source/core/workers/DedicatedWorkerGlobalScope.h
index 4d507aec8fa3caaf718cd2897bec879adde4fa00..0bdf6c07c7fdaf759aac5fa653767e7bfa266ac4 100644
--- a/Source/core/workers/DedicatedWorkerGlobalScope.h
+++ b/Source/core/workers/DedicatedWorkerGlobalScope.h
@@ -47,17 +47,17 @@ class CORE_EXPORT DedicatedWorkerGlobalScope final : public WorkerGlobalScope {
 public:
     typedef WorkerGlobalScope Base;
     static PassRefPtrWillBeRawPtr<DedicatedWorkerGlobalScope> create(DedicatedWorkerThread*, PassOwnPtr<WorkerThreadStartupData>, double timeOrigin);
-    virtual ~DedicatedWorkerGlobalScope();
+    ~DedicatedWorkerGlobalScope() override;
 
-    virtual bool isDedicatedWorkerGlobalScope() const override { return true; }
-    virtual void countFeature(UseCounter::Feature) const override;
-    virtual void countDeprecation(UseCounter::Feature) const override;
+    bool isDedicatedWorkerGlobalScope() const override { return true; }
+    void countFeature(UseCounter::Feature) const override;
+    void countDeprecation(UseCounter::Feature) const override;
 
     // Overridden to allow us to check our pending activity after executing imported script.
-    virtual void importScripts(const Vector<String>& urls, ExceptionState&) override;
+    void importScripts(const Vector<String>& urls, ExceptionState&) override;
 
     // EventTarget
-    virtual const AtomicString& interfaceName() const override;
+    const AtomicString& interfaceName() const override;
 
     void postMessage(ExecutionContext*, PassRefPtr<SerializedScriptValue>, const MessagePortArray*, ExceptionState&);