*aCanHandleContent = PR_FALSE;
*aCanHandleContent = PR_TRUE;
NS_IMETHODIMP nsWebShell::CanHandleContent(const char * aContentType,                                           const char * aCommand,                                           const char * aWindowTarget,                                           char ** aDesiredContentType,                                           PRBool * aCanHandleContent){  // the webshell knows nothing about content policy....pass this  // up to our parent content handler...  nsCOMPtr<nsIURIContentListener> parentListener;  nsresult rv = GetParentURIContentListener(getter_AddRefs(parentListener));  if (NS_SUCCEEDED(rv))    rv = parentListener->CanHandleContent(aContentType, aCommand, aWindowTarget, aDesiredContentType,                                           aCanHandleContent);  else    *aCanHandleContent = PR_FALSE;  return NS_OK;} 