diff -r 000000000000 -r 6474c204b198 dom/tests/mochitest/localstorage/interOriginFrame.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/tests/mochitest/localstorage/interOriginFrame.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,55 @@
+function postMsg(message)
+{
+  parent.postMessage(message, "http://mochi.test:8888");
+}
+
+window.addEventListener("message", onMessageReceived, false);
+
+function onMessageReceived(event)
+{
+  if (event.data == "step") {
+    var performed = false;
+    try {
+      performed = doStep();
+    }
+    catch (ex) {
+      postMsg("FAILURE: exception threw at "+ location +":\n" + ex);
+      finishTest();
+    }
+
+    if (performed)
+      postMsg("perf");
+
+    return;
+  }
+
+  postMsg("Invalid message");
+}
+
+function ok(a, message)
+{
+  if (!a)
+    postMsg("FAILURE: " + message);
+  else
+    postMsg(message);
+}
+
+function is(a, b, message)
+{
+  if (a != b)
+    postMsg("FAILURE: " + message + ", expected "+b+" got "+a);
+  else
+    postMsg(message + ", expected "+b+" got "+a);
+}
+
+function todo(a, b, message)
+{
+  postMsg("TODO: " + message + ", expected "+b+" got "+a);
+}
+
+function finishTest()
+{
+  localStorage.clear();
+  postMsg("done");
+  return false;
+}