diff -r 000000000000 -r 6474c204b198 browser/metro/components/PromptService.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/metro/components/PromptService.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,103 @@
+// -*- Mode: js2; tab-width: 2; indent-tabs-mode: nil; js2-basic-offset: 2; js2-skip-preprocessor-directives: t; -*-
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+const Ci = Components.interfaces;
+const Cc = Components.classes;
+const Cr = Components.results;
+const Cu = Components.utils;
+
+Cu.import("resource://gre/modules/XPCOMUtils.jsm");
+Cu.import("resource://gre/modules/Services.jsm");
+
+function PromptService() {
+
+}
+
+PromptService.prototype = {
+  classID: Components.ID("{9a61149b-2276-4a0a-b79c-be994ad106cf}"),
+
+  QueryInterface: XPCOMUtils.generateQI([Ci.nsIPromptFactory, Ci.nsIPromptService, Ci.nsIPromptService2]),
+
+  /* ----------  nsIPromptFactory  ---------- */
+
+  getPrompt: function getPrompt(domWin, iid) {
+    if (!domWin) {
+      let chromeWin = Services.wm.getMostRecentWindow("navigator:browser");
+      if (!chromeWin) {
+        let msg = "PromptService.js: Attempted create a prompt but no DOM Window specified and failed to find one";
+        Cu.reportError(msg);
+        throw(msg);
+      }
+      domWin = chromeWin.getBrowser().contentWindow;
+    }
+
+    let factory =
+          Components.classesByID["{1c978d25-b37f-43a8-a2d6-0c7a239ead87}"]
+                    .createInstance(Ci.nsIPromptFactory);
+
+    let prompt = factory.getPrompt(domWin, iid);
+    try {
+      let bag = prompt.QueryInterface(Ci.nsIWritablePropertyBag2);
+      bag.setPropertyAsBool("allowTabModal", true);
+    } catch(e) {
+    }
+    return prompt;
+  },
+
+  /* ----------  private memebers  ---------- */
+
+  callProxy: function(aName, aArgs) {
+    let domWin = aArgs[0];
+    let prompt = this.getPrompt(domWin, Ci.nsIPrompt);
+    if (aName == 'promptAuth' || aName == 'promptAuthAsync') {
+      let adapterFactory =
+            Components.classesByID["{6e134924-6c3a-4d86-81ac-69432dd971dc}"]
+                      .createInstance(Ci.nsIAuthPromptAdapterFactory);
+      prompt = adapterFactory.createAdapter(prompt);
+    }
+
+    return prompt[aName].apply(prompt, Array.prototype.slice.call(aArgs, 1));
+  },
+
+  /* ----------  nsIPromptService  ---------- */
+
+  alert: function() {
+    return this.callProxy("alert", arguments);
+  },
+  alertCheck: function() {
+    return this.callProxy("alertCheck", arguments);
+  },
+  confirm: function() {
+    return this.callProxy("confirm", arguments);
+  },
+  confirmCheck: function() {
+    return this.callProxy("confirmCheck", arguments);
+  },
+  confirmEx: function() {
+    return this.callProxy("confirmEx", arguments);
+  },
+  prompt: function() {
+    return this.callProxy("prompt", arguments);
+  },
+  promptUsernameAndPassword: function() {
+    return this.callProxy("promptUsernameAndPassword", arguments);
+  },
+  promptPassword: function() {
+    return this.callProxy("promptPassword", arguments);
+  },
+  select: function() {
+    return this.callProxy("select", arguments);
+  },
+
+  /* ----------  nsIPromptService2  ---------- */
+
+  promptAuth: function() {
+    return this.callProxy("promptAuth", arguments);
+  },
+  asyncPromptAuth: function() {
+    return this.callProxy("asyncPromptAuth", arguments);
+  }
+};
+
+this.NSGetFactory = XPCOMUtils.generateNSGetFactory([PromptService]);