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

Source/core/workers/WorkerLocation.h

Index: Source/core/workers/WorkerLocation.h
diff --git a/Source/core/workers/WorkerLocation.h b/Source/core/workers/WorkerLocation.h
index b0d778c4fe18e94f736d22954495cc98cf2f09f5..56f46d8bca4a3518ce3a01449015340900dc98c8 100644
--- a/Source/core/workers/WorkerLocation.h
+++ b/Source/core/workers/WorkerLocation.h
@@ -43,8 +43,8 @@ public:
         return new WorkerLocation(url);
     }
 
-    virtual KURL url() const override { return m_url; }
-    virtual String input() const override
+    KURL url() const override { return m_url; }
+    String input() const override
     {
         ASSERT_NOT_REACHED();
         return String();