rem:   return ""; 
context:   _getIconURLForPreferredAction: function(aHandlerInfo) {    switch (aHandlerInfo.preferredAction) {      case Ci.nsIHandlerInfo.handleInternally:        if (aHandlerInfo.type == TYPE_MAYBE_FEED)          return ICON_URL_LIVEMARK;        break;      case Ci.nsIHandlerInfo.useSystemDefault:        return this._getIconURLForSystemDefault(aHandlerInfo);      case Ci.nsIHandlerInfo.useHelperApp:        let preferredApp = aHandlerInfo.preferredApplicationHandler;        if (this.isValidHandlerApp(preferredApp))          return this._getIconURLForHandlerApp(preferredApp);        break;      case kActionUsePlugin:        return ICON_URL_PLUGIN;    }    // We don't know how to get an icon URL for any other actions.    return "";  },
meta: 10520	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/10520/64af4a4290ce2b7fe822855c756c16aa8862e2ab/applications.js/buggy/browser/components/preferences/applications.js