function run_test() {
let cr = Cc["@mozilla.org/chrome/chrome-registry;1"].getService(
Ci.nsIChromeRegistry
);
let sourceURI = Services.io.newURI("chrome://test_crlf/content/"); // this throws for packages that are not registered
let file = cr.convertChromeURL(sourceURI).QueryInterface(Ci.nsIFileURL).file;