diff -r 000000000000 -r 6474c204b198 layout/base/tests/file_bug842853.sjs
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/layout/base/tests/file_bug842853.sjs	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,14 @@
+var timer;
+
+function handleRequest(request, response)
+{
+  response.setHeader("Cache-Control", "no-cache, must-revalidate", false);
+  response.setHeader("Content-Type", "text/css", false);
+  response.write("body { background:lime; color:red; }");
+  response.processAsync();
+  timer = Components.classes["@mozilla.org/timer;1"]
+    .createInstance(Components.interfaces.nsITimer);
+  timer.initWithCallback(function() {
+      response.finish();
+    }, 500, Components.interfaces.nsITimer.TYPE_ONE_SHOT);
+}