diff -r 000000000000 -r 6474c204b198 dom/tests/mochitest/ajax/offline/obsoletingManifest.sjs
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/tests/mochitest/ajax/offline/obsoletingManifest.sjs	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,31 @@
+var manifest =
+  "CACHE MANIFEST\n" +
+  "obsolete.html\n";
+
+function handleRequest(request, response)
+{
+  var match = request.queryString.match(/^state=(.*)$/);
+  if (match)
+  {
+    response.setStatusLine(request.httpVersion, 204, "No content");
+    response.setHeader("Cache-Control", "no-cache");
+    setState("offline.obsoletingManifest", match[1]);
+  }
+
+  if (request.queryString == "")
+  {
+    switch (getState("offline.obsoletingManifest"))
+    {
+      case "": // The default value
+        response.setStatusLine(request.httpVersion, 404, "Not found");
+        response.setHeader("Cache-Control", "no-cache");
+        break;
+      case "manifestPresent":
+        response.setStatusLine(request.httpVersion, 200, "Ok");
+        response.setHeader("Content-Type", "text/cache-manifest");
+        response.setHeader("Cache-Control", "no-cache");
+        response.write(manifest);
+        break;
+    }
+  }
+}