diff -r 000000000000 -r 6474c204b198 xpcom/tests/unit/test_comp_no_aslr.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/xpcom/tests/unit/test_comp_no_aslr.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,18 @@
+Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
+
+const Cc = Components.classes;
+const Ci = Components.interfaces;
+
+function run_test() {
+  let manifest = do_get_file('testcompnoaslr.manifest');
+  Components.manager.autoRegister(manifest);
+  var sysInfo = Cc["@mozilla.org/system-info;1"].
+                getService(Ci.nsIPropertyBag2);
+  var ver = parseFloat(sysInfo.getProperty("version"));
+  if (ver < 6.0) {
+    // This is disabled on pre-Vista OSs.
+    do_check_true("{335fb596-e52d-418f-b01c-1bf16ce5e7e4}" in Components.classesByID);
+  } else {
+    do_check_false("{335fb596-e52d-418f-b01c-1bf16ce5e7e4}" in Components.classesByID);
+  }
+}