rem: function cancel() 
add: function cancel() 
context: function cancel() {    if (manager)        manager.CancelInstall();    // window is closed by native impl after cleanup}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/43795b236b34dc4f00b544301771a30bc1e1cfe9/xpistatus.js/buggy/xpinstall/res/content/xpistatus.js