rem: if (sourceURL) 
add: if (sourceURL) 
context: this.getSourceFileForEval = function(script, context) {    this.initSourceFileForEval(context);    var sourceURL = context.evalSourceURLByTag[script.tag];    if (sourceURL)         return context.evalSourceFilesByURL[sourceURL];};
meta: 7450	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/7450/8237a6359bebacf3e34f1134ef713c687c8e3edb/lib.js/clean/extension/content/firebug/lib.js