Reduce how often LayoutSVGShape::updateShapeFromElement is called

Source/core/svg/SVGGeometryElement.h

 /*
  * Copyright (C) 2013 Samsung Electronics. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 33 matching lines @@
     bool isPointInFill(PassRefPtrWillBeRawPtr<SVGPointTearOff>) const;
     bool isPointInStroke(PassRefPtrWillBeRawPtr<SVGPointTearOff>) const;
 
     void toClipPath(Path&) override;
 
     LayoutObject* createLayoutObject(const ComputedStyle&) override;
 
 protected:
     SVGGeometryElement(const QualifiedName&, Document&, ConstructionType = CreateSVGElement);
 
+    void svgAttributeChanged(const QualifiedName&) override;
+
 private:
     bool isSVGGeometryElement() const override final { return true; }
 };
 
 inline bool isSVGGeometryElement(const SVGElement& element)
 {
     return element.isSVGGeometryElement();
 }
 
 DEFINE_SVGELEMENT_TYPE_CASTS_WITH_FUNCTION(SVGGeometryElement);
 
 } // namespace blink
 
 #endif // SVGGeometryElement_h