add: this.mRegressionTester = Components.classes["@mozilla.org/layout-debug/regressiontester;1"]. createInstance(nsILayoutRegressionTester) 
context:   init : function(aLocalFile, aIsBaseline)    {      this.mIsBaseline = aIsBaseline;      this.mURLs = new Array();      this.readFileList(aLocalFile);    },
meta: 5872	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5872/806d07f13f5b23c2cb48c910c91cfb952375b3f2/layoutdebug.js/buggy/extensions/layout-debug/ui/content/layoutdebug.js