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

Source/core/layout/shapes/BoxShape.h

 /*
  * Copyright (C) 2013 Adobe Systems Incorporated. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1. Redistributions of source code must retain the above
  *    copyright notice, this list of conditions and the following
  *    disclaimer.
@@ skipping 25 matching lines @@
 namespace blink {
 
 class BoxShape final : public Shape {
 public:
     BoxShape(const FloatRoundedRect& bounds)
         : Shape()
         , m_bounds(bounds)
     {
     }
 
-    virtual LayoutRect shapeMarginLogicalBoundingBox() const override;
-    virtual bool isEmpty() const override { return m_bounds.isEmpty(); }
-    virtual LineSegment getExcludedInterval(LayoutUnit logicalTop, LayoutUnit logicalHeight) const override;
-    virtual void buildDisplayPaths(DisplayPaths&) const override;
+    LayoutRect shapeMarginLogicalBoundingBox() const override;
+    bool isEmpty() const override { return m_bounds.isEmpty(); }
+    LineSegment getExcludedInterval(LayoutUnit logicalTop, LayoutUnit logicalHeight) const override;
+    void buildDisplayPaths(DisplayPaths&) const override;
 
 private:
     FloatRoundedRect shapeMarginBounds() const;
 
     FloatRoundedRect m_bounds;
 };
 
 } // namespace blink
 
 #endif // BoxShape_h