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

Source/core/layout/LayoutFrameSet.h

Index: Source/core/layout/LayoutFrameSet.h
diff --git a/Source/core/layout/LayoutFrameSet.h b/Source/core/layout/LayoutFrameSet.h
index 526628eeb60c7640986bc3cd1d43d2a7ccb4ccea..7a9aaa89778f64ee3ca61ba26396431d97816e95 100644
--- a/Source/core/layout/LayoutFrameSet.h
+++ b/Source/core/layout/LayoutFrameSet.h
@@ -56,7 +56,7 @@ private:
 class LayoutFrameSet final : public LayoutBox {
 public:
     LayoutFrameSet(HTMLFrameSetElement*);
-    virtual ~LayoutFrameSet();
+    ~LayoutFrameSet() override;
 
     LayoutObject* firstChild() const { ASSERT(children() == virtualChildren()); return children()->firstChild(); }
     LayoutObject* lastChild() const { ASSERT(children() == virtualChildren()); return children()->lastChild(); }
@@ -95,21 +95,21 @@ public:
     const GridAxis& rows() { return m_rows; }
     const GridAxis& columns() { return m_cols; }
 
-    virtual const char* name() const override { return "LayoutFrameSet"; }
+    const char* name() const override { return "LayoutFrameSet"; }
 
 private:
     static const int noSplit = -1;
 
-    virtual LayoutObjectChildList* virtualChildren() override { return children(); }
-    virtual const LayoutObjectChildList* virtualChildren() const override { return children(); }
+    LayoutObjectChildList* virtualChildren() override { return children(); }
+    const LayoutObjectChildList* virtualChildren() const override { return children(); }
 
-    virtual bool isOfType(LayoutObjectType type) const override { return type == LayoutObjectFrameSet || LayoutBox::isOfType(type); }
+    bool isOfType(LayoutObjectType type) const override { return type == LayoutObjectFrameSet || LayoutBox::isOfType(type); }
 
-    virtual void layout() override;
-    virtual void paint(const PaintInfo&, const LayoutPoint&) override;
-    virtual void computePreferredLogicalWidths() override;
-    virtual bool isChildAllowed(LayoutObject*, const ComputedStyle&) const override;
-    virtual CursorDirective getCursor(const LayoutPoint&, Cursor&) const override;
+    void layout() override;
+    void paint(const PaintInfo&, const LayoutPoint&) override;
+    void computePreferredLogicalWidths() override;
+    bool isChildAllowed(LayoutObject*, const ComputedStyle&) const override;
+    CursorDirective getCursor(const LayoutPoint&, Cursor&) const override;
 
     void setIsResizing(bool);