return this; 
return this; 
  QueryInterface : function(iid)  {    if (iid.equals(Components.interfaces.nsIDownloadProgressListener) ||        iid.equals(Components.interfaces.nsISupports))    return this;    throw Components.results.NS_NOINTERFACE;  },
5459	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/5459/43455f9fc69a7b8e33dae13cc90fd333fc5448d2/DownloadProgressListener.js/clean/toolkit/mozapps/downloads/content/DownloadProgressListener.js