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

Source/core/workers/WorkerLocation.h

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 25 matching lines @@
 namespace blink {
 
 class WorkerLocation final : public GarbageCollectedFinalized<WorkerLocation>, public ScriptWrappable, public DOMURLUtilsReadOnly {
     DEFINE_WRAPPERTYPEINFO();
 public:
     static WorkerLocation* create(const KURL& url)
     {
         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();
     }
 
     DEFINE_INLINE_TRACE() { }
 
 private:
     explicit WorkerLocation(const KURL& url)
         : m_url(url) { }
 
     KURL m_url;
 };
 
 } // namespace blink
 
 #endif // WorkerLocation_h