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

Source/core/rendering/svg/RenderSVGShape.h

Index: Source/core/rendering/svg/RenderSVGShape.h
diff --git a/Source/core/rendering/svg/RenderSVGShape.h b/Source/core/rendering/svg/RenderSVGShape.h
index 12a703f063b4f29d0e565710507ba66d9b7eb91d..518b5742001cbca58cf33989cc7a1c64a0351e1d 100644
--- a/Source/core/rendering/svg/RenderSVGShape.h
+++ b/Source/core/rendering/svg/RenderSVGShape.h
@@ -60,9 +60,10 @@ public:
         return *m_path;
     }
 
+    virtual bool isShapeEmpty() const { return path().isEmpty(); }
+
 protected:
     virtual void updateShapeFromElement();
-    virtual bool isShapeEmpty() const { return path().isEmpty(); }
     virtual bool shapeDependentStrokeContains(const FloatPoint&);
     virtual bool shapeDependentFillContains(const FloatPoint&, const WindRule) const;
     float strokeWidth() const;