rem: this.SourceFile = function(url, source) 
add: this.SourceFile = function (compilation_unit_type) 
context: this.SourceFile = function(url, source){    this.href = url;    if (source)        this.source = source;    this.pcMapTypeByScriptTag = {};};
meta: 7450	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/7450/c5f013dccda5f25ec6c3894c73898353bae36759/lib.js/buggy/extension/content/firebug/lib.js