add: WindowStack.removeWindow (chrome_root); 
context:   WindowUnmapped : function(content) {     var chrome_root = content.chrome;     content.chrome.style.visibility = "hidden";  },
meta: 7798	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/7798/5cae23aad5c504b1087a4076d86e458a9eb978c0/compzillaWindowManager.js/clean/pyrodesktop/compzilla/compzilla/components/compzillaWindowManager.js