rem: throw Components.results.NS_ERROR_NO_INTERFACE; 
add: Components.returnCode = Cr.NS_ERROR_NO_INTERFACE; return null; 
context: 	QueryInterface: function(iid) {		if (iid.equals(Components.interfaces.nsISupports) ||				iid.equals(Components.interfaces.nsIFactory))			return this;		throw Components.results.NS_ERROR_NO_INTERFACE;	}
meta: 3444	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/3444/69ede0113cbce67841acc3daa9a68fc887b7a083/cssblocker.js/clean/src/components/cssblocker.js