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

Source/core/html/HTMLDocument.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2006, 2007, 2008, 2009 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 20 matching lines @@
 
 class HTMLBodyElement;
 
 class CORE_EXPORT HTMLDocument : public Document, public ResourceClient {
     DEFINE_WRAPPERTYPEINFO();
 public:
     static PassRefPtrWillBeRawPtr<HTMLDocument> create(const DocumentInit& initializer = DocumentInit())
     {
         return adoptRefWillBeNoop(new HTMLDocument(initializer));
     }
-    virtual ~HTMLDocument();
+    ~HTMLDocument() override;
 
     const AtomicString& bgColor() const;
     void setBgColor(const AtomicString&);
     const AtomicString& fgColor() const;
     void setFgColor(const AtomicString&);
     const AtomicString& alinkColor() const;
     void setAlinkColor(const AtomicString&);
     const AtomicString& linkColor() const;
     void setLinkColor(const AtomicString&);
     const AtomicString& vlinkColor() const;
@@ skipping 12 matching lines @@
     void removeExtraNamedItem(const AtomicString& name);
     bool hasExtraNamedItem(const AtomicString& name);
 
     using Document::write;
     using Document::writeln;
     void write(LocalDOMWindow*, const Vector<String>& text, ExceptionState&);
     void writeln(LocalDOMWindow*, const Vector<String>& text, ExceptionState&);
 
     static bool isCaseSensitiveAttribute(const QualifiedName&);
 
-    virtual PassRefPtrWillBeRawPtr<Document> cloneDocumentWithoutChildren() override final;
+    PassRefPtrWillBeRawPtr<Document> cloneDocumentWithoutChildren() final;
 
 protected:
     HTMLDocument(const DocumentInit&, DocumentClassFlags extendedDocumentClasses = DefaultDocumentClass);
 
 private:
     HTMLBodyElement* htmlBodyElement() const;
 
     const AtomicString& bodyAttributeValue(const QualifiedName&) const;
     void setBodyAttribute(const QualifiedName&, const AtomicString&);
 
@@ skipping 12 matching lines @@
 inline bool HTMLDocument::hasExtraNamedItem(const AtomicString& name)
 {
     return m_extraNamedItemCounts.contains(name);
 }
 
 DEFINE_DOCUMENT_TYPE_CASTS(HTMLDocument);
 
 } // namespace blink
 
 #endif // HTMLDocument_h