Create Login UI for Demo User.

chrome/browser/resources/chromeos/login/demo_user_login.js

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/**
+ * @fileoverview Demo login UI.
+ */
+
+/**
+ * Handles a user clicking anywhere on the screen. This will log the demo user
+ * in. Yes, this actually _is the intention.
+ */
+onClick = function() {
+  chrome.send('launchDemoUser');
+};
+
+/**
+ * Initializes the click handler.
+ */
+initialize = function() {
+  document.addEventListener('click', onClick);
+};
+
+disableTextSelectAndDrag();
+document.addEventListener('DOMContentLoaded', initialize);