void StyleSetImpl::ListContexts(FILE* out, PRInt32 aIndent)
void StyleSetImpl::ListContexts(nsIStyleContext* aRootContext, FILE* out, PRInt32 aIndent)
void StyleSetImpl::ListContexts(FILE* out, PRInt32 aIndent){  mStyleContexts.Enumerate(GatherContexts);  NS_ASSERTION(gRootNode->mNext == nsnull, "dangling orphan");  PRInt32 listCount = ListNode(gRootNode, out, aIndent);  NS_ASSERTION(listCount == mStyleContexts.Count(), "graph incomplete");  delete gRootNode;  gRootNode = nsnull;}