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

chrome/browser/resources/settings/date_time_page/date_time_page.css

+/* 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. */
+
+core-label {
+  margin: 10px;
+}
+
+.time-zone-label {
+  -webkit-margin-end: 10px;
+}
+
+cr-checkbox {
+  -webkit-margin-end: 10px;
+}
+
+cr-input {

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

some of this looks copy-pasted from downloads_page.css and not needed here

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

Done.

+  width: 300px;
+}
+
+cr-input /deep/ #input {
+  margin: 0.25em 0;
+}
+
+.location-label {
+  -webkit-margin-end: 10px;
+}
+
+#setAutomatically {
+  margin: 10px;
+}