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

Source/core/layout/LayoutListItem.h

Index: Source/core/layout/LayoutListItem.h
diff --git a/Source/core/layout/LayoutListItem.h b/Source/core/layout/LayoutListItem.h
index bb82199e019192a84fd5bf04386c93563c4cc4e0..580c8ed83f717ed29072a5e8ee07cd742757f8da 100644
--- a/Source/core/layout/LayoutListItem.h
+++ b/Source/core/layout/LayoutListItem.h
@@ -62,28 +62,28 @@ public:
 
     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;