PrefsChanged(nsnull, nsnull);
static PRBool BlinkIsAllowed(void){  if (!sPrefIsLoaded) {    // Set up a listener and check the initial value    nsCOMPtr<nsIPref> prefs = do_GetService(NS_PREF_CONTRACTID);    if (prefs) {      prefs->RegisterCallback("browser.blink_allowed", PrefsChanged,                               nsnull);    }    PrefsChanged(nsnull, nsnull);    sPrefIsLoaded = PR_TRUE;  }  return sBlinkIsAllowed;}