Add initial implementation of date-time-settings MD settings page.

chrome/browser/resources/settings/date_time_page/demo.js

 // Copyright 2015 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.
 
 /**
- * Wire up the prefs to the a11y page.
+ * Wire up the prefs to the date/time page.
  */
 window.onload = function() {

[michaelpg, 2015/03/08 05:57:08]

Sry to be repetitive from the other CL. I think we should wait for polymer-ready
instead of window.onload, but I've sent another email to hear for sure.

[Oren Blasberg, 2015/03/10 01:25:01]

Done.

-  var page = document.querySelector('cr-settings-a11y-page');
+  var page = document.querySelector('cr-settings-date-time-page');
   page.prefs = document.querySelector('cr-settings-prefs');
 };