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

Source/core/layout/LayoutListItem.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 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 44 matching lines @@
 
     void updateListMarkerNumbers();
 
     static void updateItemValuesForOrderedList(const HTMLOListElement*);
     static unsigned itemCountForOrderedList(const HTMLOListElement*);
 
     bool isEmpty() const;
 
     LayoutListMarker* marker() const { return m_marker; }
 
-    virtual const char* name() const override { return "LayoutListItem"; }
+    const char* name() const override { return "LayoutListItem"; }
 
 private:
-    virtual bool isOfType(LayoutObjectType type) const override { return type == LayoutObjectListItem || LayoutBlockFlow::isOfType(type); }
+    bool isOfType(LayoutObjectType type) const override { return type == LayoutObjectListItem || LayoutBlockFlow::isOfType(type); }
 
-    virtual void willBeDestroyed() override;
+    void willBeDestroyed() override;
 
-    virtual void insertedIntoTree() override;
-    virtual void willBeRemovedFromTree() override;
+    void insertedIntoTree() override;
+    void willBeRemovedFromTree() override;
 
-    virtual void paint(const PaintInfo&, const LayoutPoint&) override;
+    void paint(const PaintInfo&, const LayoutPoint&) override;
 
-    virtual void subtreeDidChange() final;
+    void subtreeDidChange() final;
 
     // Returns true if we re-attached and updated the location of the marker.
     bool updateMarkerLocation();
 
     void positionListMarker();
 
-    virtual void styleDidChange(StyleDifference, const ComputedStyle* oldStyle) override;
+    void styleDidChange(StyleDifference, const ComputedStyle* oldStyle) override;
 
-    virtual void addOverflowFromChildren() override;
+    void addOverflowFromChildren() override;
 
     inline int calcValue() const;
     void updateValueNow() const;
     void explicitValueChanged();
 
     int m_explicitValue;
     LayoutListMarker* m_marker;
     mutable int m_value;
 
     bool m_hasExplicitValue : 1;
     mutable bool m_isValueUpToDate : 1;
     bool m_notInList : 1;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutListItem, isListItem());
 
 } // namespace blink
 
 #endif // LayoutListItem_h