diff -r 000000000000 -r 6474c204b198 services/metrics/tests/xpcshell/head.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/services/metrics/tests/xpcshell/head.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,15 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+(function initMetricsTestingInfrastructure() {
+  do_get_profile();
+
+  let ns = {};
+  Components.utils.import("resource://testing-common/services-common/logging.js",
+                          ns);
+
+  ns.initTestLogging("Trace");
+}).call(this);
+