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

Source/core/html/HTMLStyleElement.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 20 matching lines @@
 class HTMLStyleElement;
 
 template<typename T> class EventSender;
 typedef EventSender<HTMLStyleElement> StyleEventSender;
 
 class HTMLStyleElement final : public HTMLElement, private StyleElement {
     DEFINE_WRAPPERTYPEINFO();
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(HTMLStyleElement);
 public:
     static PassRefPtrWillBeRawPtr<HTMLStyleElement> create(Document&, bool createdByParser);
-    virtual ~HTMLStyleElement();
+    ~HTMLStyleElement() override;
 
     ContainerNode* scopingNode();
 
     using StyleElement::sheet;
 
     bool disabled() const;
     void setDisabled(bool);
 
     void dispatchPendingEvent(StyleEventSender*);
     static void dispatchPendingLoadEvents();
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
     HTMLStyleElement(Document&, bool createdByParser);
 
     // overload from HTMLElement
-    virtual void parseAttribute(const QualifiedName&, const AtomicString&) override;
-    virtual InsertionNotificationRequest insertedInto(ContainerNode*) override;
-    virtual void didNotifySubtreeInsertionsToDocument() override;
-    virtual void removedFrom(ContainerNode*) override;
-    virtual void childrenChanged(const ChildrenChange&) override;
+    void parseAttribute(const QualifiedName&, const AtomicString&) override;
+    InsertionNotificationRequest insertedInto(ContainerNode*) override;
+    void didNotifySubtreeInsertionsToDocument() override;
+    void removedFrom(ContainerNode*) override;
+    void childrenChanged(const ChildrenChange&) override;
 
-    virtual void finishParsingChildren() override;
+    void finishParsingChildren() override;
 
-    virtual bool sheetLoaded() override { return StyleElement::sheetLoaded(document()); }
-    virtual void notifyLoadedSheetAndAllCriticalSubresources(LoadedSheetErrorStatus) override;
-    virtual void startLoadingDynamicSheet() override { StyleElement::startLoadingDynamicSheet(document()); }
+    bool sheetLoaded() override { return StyleElement::sheetLoaded(document()); }
+    void notifyLoadedSheetAndAllCriticalSubresources(LoadedSheetErrorStatus) override;
+    void startLoadingDynamicSheet() override { StyleElement::startLoadingDynamicSheet(document()); }
 
-    virtual const AtomicString& media() const override;
-    virtual const AtomicString& type() const override;
+    const AtomicString& media() const override;
+    const AtomicString& type() const override;
 
     bool m_firedLoad;
     bool m_loadedSheet;
 };
 
 } // namespace blink
 
 #endif // HTMLStyleElement_h