diff -r 000000000000 -r 6474c204b198 extensions/cookie/test/unit_ipc/test_parent.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/extensions/cookie/test/unit_ipc/test_parent.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,59 @@
+const Ci = Components.interfaces;
+const Cc = Components.classes;
+const Cr = Components.results;
+
+var gIoService = Components.classes["@mozilla.org/network/io-service;1"]
+                           .getService(Components.interfaces.nsIIOService);
+
+function isParentProcess() {
+    let appInfo = Cc["@mozilla.org/xre/app-info;1"];
+    return (!appInfo || appInfo.getService(Ci.nsIXULRuntime).processType == Ci.nsIXULRuntime.PROCESS_TYPE_DEFAULT);
+}
+
+function getPrincipalForURI(aURI) {
+  var uri = gIoService.newURI(aURI, null, null);
+  return Cc["@mozilla.org/scriptsecuritymanager;1"]
+           .getService(Ci.nsIScriptSecurityManager)
+           .getNoAppCodebasePrincipal(uri);
+}
+
+function run_test() {
+  if (isParentProcess()) {
+    var pm = Cc["@mozilla.org/permissionmanager;1"].getService(Ci.nsIPermissionManager);
+
+    // Permissions created before the child is present
+    pm.addFromPrincipal(getPrincipalForURI("http://mozilla.org"), "cookie1", pm.ALLOW_ACTION, pm.EXPIRE_NEVER, 0);
+    pm.addFromPrincipal(getPrincipalForURI("http://mozilla.com"), "cookie2", pm.DENY_ACTION, pm.EXPIRE_SESSION, 0);
+    pm.addFromPrincipal(getPrincipalForURI("http://mozilla.net"), "cookie3", pm.ALLOW_ACTION, pm.EXPIRE_TIME, Date.now() + 1000*60*60*24);
+
+    var mM = Cc["@mozilla.org/parentprocessmessagemanager;1"].
+             getService(Ci.nsIMessageBroadcaster);
+
+    var messageListener = {
+      receiveMessage: function(aMessage) {
+        switch(aMessage.name) {
+          case "TESTING:Stage2":
+            // Permissions created after the child is present
+            pm.addFromPrincipal(getPrincipalForURI("http://firefox.org"), "cookie1", pm.ALLOW_ACTION, pm.EXPIRE_NEVER, 0);
+            pm.addFromPrincipal(getPrincipalForURI("http://firefox.com"), "cookie2", pm.DENY_ACTION, pm.EXPIRE_SESSION, 0);
+            pm.addFromPrincipal(getPrincipalForURI("http://firefox.net"), "cookie3", pm.ALLOW_ACTION, pm.EXPIRE_TIME, Date.now() + 1000*60*60*24);
+            mM.broadcastAsyncMessage("TESTING:Stage2A");
+            break;
+
+          case "TESTING:Stage3":
+            do_test_finished();
+            break;
+        }
+        return true;
+      },
+    };
+
+    mM.addMessageListener("TESTING:Stage2", messageListener);
+    mM.addMessageListener("TESTING:Stage3", messageListener);
+
+    do_test_pending();
+    do_load_child_test_harness();
+    run_test_in_child("test_child.js");
+  }
+}
+