Fix virtual/override/final usage in Source/core/html/.

Source/core/html/HTMLMetaElement.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2010 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 36 matching lines @@
     const AtomicString& content() const;
     const AtomicString& httpEquiv() const;
     const AtomicString& name() const;
 
 private:
     explicit HTMLMetaElement(Document&);
 
     static void processViewportKeyValuePair(Document*, const String& key, const String& value, bool viewportMetaZeroValuesQuirk, void* data);
     static void parseContentAttribute(const String& content, void* data, Document*, bool viewportMetaZeroValuesQuirk);
 
-    virtual void parseAttribute(const QualifiedName&, const AtomicString&) override;
-    virtual InsertionNotificationRequest insertedInto(ContainerNode*) override;
-    virtual void didNotifySubtreeInsertionsToDocument() override;
+    void parseAttribute(const QualifiedName&, const AtomicString&) override;
+    InsertionNotificationRequest insertedInto(ContainerNode*) override;
+    void didNotifySubtreeInsertionsToDocument() override;
 
     static float parsePositiveNumber(Document*, const String& key, const String& value, bool* ok = 0);
 
     static Length parseViewportValueAsLength(Document*, const String& key, const String& value);
     static float parseViewportValueAsZoom(Document*, const String& key, const String& value, bool& computedValueMatchesParsedValue, bool viewportMetaZeroValuesQuirk);
     static bool parseViewportValueAsUserZoom(Document*, const String& key, const String& value, bool& computedValueMatchesParsedValue);
     static float parseViewportValueAsDPI(Document*, const String& key, const String& value);
 
     static void reportViewportWarning(Document*, ViewportErrorCode, const String& replacement1, const String& replacement2);
 
     void process();
     void processViewportContentAttribute(const String& content, ViewportDescription::Type origin);
 };
 
 } // namespace blink
 
 #endif // HTMLMetaElement_h