rem: histMenu.addEventListener("popupshowing", function() { HistoryMenu.populateUndoSubmenu(); }, false); 
add: undoCloseTabItem.addEventListener("command", function() { undoCloseTab(0); }, false); 
context:   histMenu.addEventListener("popupshowing", function() { HistoryMenu.populateUndoSubmenu(); }, false);
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8395/ba335cf495bac68ab38760ba0314db26dad69938/browser.js/clean/browser/base/content/browser.js