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

Source/core/html/HTMLAppletElement.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2006, 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 17 matching lines @@
 namespace blink {
 
 class KURL;
 
 class HTMLAppletElement final : public HTMLPlugInElement {
     DEFINE_WRAPPERTYPEINFO();
 public:
     static PassRefPtrWillBeRawPtr<HTMLAppletElement> create(Document&, bool createdByParser);
 
 protected:
-    virtual LayoutPart* layoutPartForJSBindings() const override;
+    LayoutPart* layoutPartForJSBindings() const override;
 
 private:
     HTMLAppletElement(Document&, bool createdByParser);
 
-    virtual void parseAttribute(const QualifiedName&, const AtomicString&) override;
-    virtual bool isURLAttribute(const Attribute&) const override;
-    virtual bool hasLegalLinkAttribute(const QualifiedName&) const override;
+    void parseAttribute(const QualifiedName&, const AtomicString&) override;
+    bool isURLAttribute(const Attribute&) const override;
+    bool hasLegalLinkAttribute(const QualifiedName&) const override;
 
-    virtual bool layoutObjectIsNeeded(const ComputedStyle&) override;
-    virtual LayoutObject* createLayoutObject(const ComputedStyle&) override;
+    bool layoutObjectIsNeeded(const ComputedStyle&) override;
+    LayoutObject* createLayoutObject(const ComputedStyle&) override;
 
-    virtual LayoutPart* existingLayoutPart() const override;
-    virtual void updateWidgetInternal() override;
+    LayoutPart* existingLayoutPart() const override;
+    void updateWidgetInternal() override;
 
     bool canEmbedJava() const;
     bool canEmbedURL(const KURL&) const;
 
-    virtual bool shouldRegisterAsNamedItem() const override { return true; }
-    virtual bool shouldRegisterAsExtraNamedItem() const override { return true; }
+    bool shouldRegisterAsNamedItem() const override { return true; }
+    bool shouldRegisterAsExtraNamedItem() const override { return true; }
 };
 
 } // namespace blink
 
 #endif // HTMLAppletElement_h