[SVG2] Elements that don't render shouldn't contribute to ancestor bboxes.

Source/core/rendering/svg/RenderSVGEllipse.h

 /*
  * Copyright (C) 2012 Google, Inc.
  * 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.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 18 matching lines @@
 
 #include "core/rendering/svg/RenderSVGShape.h"
 
 namespace WebCore {
 
 class RenderSVGEllipse FINAL : public RenderSVGShape {
 public:
     explicit RenderSVGEllipse(SVGGraphicsElement*);
     virtual ~RenderSVGEllipse();
 
+    virtual bool isRenderingDisabled() const OVERRIDE;
+
 private:
     virtual const char* renderName() const OVERRIDE { return "RenderSVGEllipse"; }
 
     virtual void updateShapeFromElement() OVERRIDE;
     virtual bool isShapeEmpty() const OVERRIDE { return m_usePathFallback ? RenderSVGShape::isShapeEmpty() : m_fillBoundingBox.isEmpty(); }
     virtual void fillShape(GraphicsContext*) const OVERRIDE;
     virtual void strokeShape(GraphicsContext*) const OVERRIDE;
     virtual bool shapeDependentStrokeContains(const FloatPoint&) OVERRIDE;
     virtual bool shapeDependentFillContains(const FloatPoint&, const WindRule) const OVERRIDE;
+
     void calculateRadiiAndCenter();
 
 private:
     FloatPoint m_center;
     FloatSize m_radii;
     bool m_usePathFallback;
 };
 
 }
 
 #endif