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

Source/core/html/HTMLOutputElement.h

 /*
  * Copyright (c) 2010 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 23 matching lines @@
 #include "core/dom/DOMSettableTokenList.h"
 #include "core/html/HTMLFormControlElement.h"
 
 namespace blink {
 
 class HTMLOutputElement final : public HTMLFormControlElement {
     DEFINE_WRAPPERTYPEINFO();
 public:
     static PassRefPtrWillBeRawPtr<HTMLOutputElement> create(Document&, HTMLFormElement*);
 
-    virtual bool willValidate() const override { return false; }
+    bool willValidate() const override { return false; }
 
     String value() const;
     void setValue(const String&);
     String defaultValue() const;
     void setDefaultValue(const String&);
     void setFor(const AtomicString&);
     DOMSettableTokenList* htmlFor() const;
 
-    virtual bool canContainRangeEndPoint() const override { return false; }
+    bool canContainRangeEndPoint() const override { return false; }
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
     HTMLOutputElement(Document&, HTMLFormElement*);
 
-    virtual void parseAttribute(const QualifiedName&, const AtomicString&) override;
-    virtual const AtomicString& formControlType() const override;
-    virtual bool isEnumeratable() const override { return true; }
-    virtual bool supportLabels() const override { return true; }
-    virtual bool supportsFocus() const override;
-    virtual void childrenChanged(const ChildrenChange&) override;
-    virtual void resetImpl() override;
+    void parseAttribute(const QualifiedName&, const AtomicString&) override;
+    const AtomicString& formControlType() const override;
+    bool isEnumeratable() const override { return true; }
+    bool supportLabels() const override { return true; }
+    bool supportsFocus() const override;
+    void childrenChanged(const ChildrenChange&) override;
+    void resetImpl() override;
 
     bool m_isDefaultValueMode;
     String m_defaultValue;
     RefPtrWillBeMember<DOMSettableTokenList> m_tokens;
 };
 
 } // namespace blink
 
 #endif // HTMLOutputElement_h