Fix virtual/override/final usage in Source/web/.

Source/web/WorkerGlobalScopeProxyProviderImpl.h

Index: Source/web/WorkerGlobalScopeProxyProviderImpl.h
diff --git a/Source/web/WorkerGlobalScopeProxyProviderImpl.h b/Source/web/WorkerGlobalScopeProxyProviderImpl.h
index 3b4c8148957774850d0d2378fdb3fd9e74d9d580..1f07a7c56c9ebe57d41856ace99222ec789fda2b 100644
--- a/Source/web/WorkerGlobalScopeProxyProviderImpl.h
+++ b/Source/web/WorkerGlobalScopeProxyProviderImpl.h
@@ -49,8 +49,8 @@ public:
         return adoptPtrWillBeNoop(new WorkerGlobalScopeProxyProviderImpl());
     }
 
-    virtual ~WorkerGlobalScopeProxyProviderImpl() { }
-    virtual WorkerGlobalScopeProxy* createWorkerGlobalScopeProxy(Worker*) override;
+    ~WorkerGlobalScopeProxyProviderImpl() override { }
+    WorkerGlobalScopeProxy* createWorkerGlobalScopeProxy(Worker*) override;
 
     DEFINE_INLINE_VIRTUAL_TRACE() { WorkerGlobalScopeProxyProvider::trace(visitor); }