UndisplayedNode*  node = new UndisplayedNode(aPseudoStyle);
UndisplayedNode*  node = new UndisplayedNode(aChild, aStyle);
UndisplayedMap::AddNodeFor(nsIContent* aParentContent, nsIStyleContext* aPseudoStyle){  UndisplayedNode*  node = new UndisplayedNode(aPseudoStyle);  if (! node) {    return NS_ERROR_OUT_OF_MEMORY;  }  return AppendNodeFor(node, aParentContent);}