nsSVGCircleFrame* it = new (aPresShell) nsSVGCircleFrame; if (nsnull == it) return NS_ERROR_OUT_OF_MEMORY;
NS_NewSVGCircleFrame(nsIPresShell* aPresShell, nsIContent* aContent, nsIFrame** aNewFrame){  *aNewFrame = nsnull;    nsCOMPtr<nsIDOMSVGCircleElement> circle = do_QueryInterface(aContent);  if (!circle) {#ifdef DEBUG    printf("warning: trying to construct an SVGCircleFrame for a content element that doesn't support the right interfaces\n");#endif    return NS_ERROR_FAILURE;  }    nsSVGCircleFrame* it = new (aPresShell) nsSVGCircleFrame;  if (nsnull == it)    return NS_ERROR_OUT_OF_MEMORY;  *aNewFrame = it;  return NS_OK;}