PRBool isOnlyWS; textContent->IsOnlyWhitespace(&isOnlyWS); return isOnlyWS;
return textContent->IsOnlyWhitespace();
nsTextFrame::IsEmpty(){    // XXXldb Should this check compatibility mode as well???  if (GetStyleText()->WhiteSpaceIsSignificant()) {    return PR_FALSE;  }  nsCOMPtr<nsITextContent> textContent( do_QueryInterface(mContent) );  if (! textContent) {    NS_NOTREACHED("text frame has no text content");    return PR_TRUE;  }  PRBool isOnlyWS;  textContent->IsOnlyWhitespace(&isOnlyWS);  return isOnlyWS;}