MD Settings: Show "Set date and time" button when relevant

chrome/browser/resources/settings/date_time_page/date_time_page.html

Index: chrome/browser/resources/settings/date_time_page/date_time_page.html
diff --git a/chrome/browser/resources/settings/date_time_page/date_time_page.html b/chrome/browser/resources/settings/date_time_page/date_time_page.html
index 92709f6541b6bd4abd26f9052ef4f7a77aff35de..840d2606b31a6d183884728fc4d285c3131f9907 100644
--- a/chrome/browser/resources/settings/date_time_page/date_time_page.html
+++ b/chrome/browser/resources/settings/date_time_page/date_time_page.html
@@ -2,6 +2,7 @@
 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/html/web_ui_listener_behavior.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-checkbox/paper-checkbox.html">
+<link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button-light.html">
 <link rel="import" href="/controls/settings_checkbox.html">
 <link rel="import" href="/controls/settings_dropdown_menu.html">
 <link rel="import" href="/i18n_setup.html">
@@ -44,6 +45,13 @@
           label="$i18n{use24HourClock}">
       </settings-checkbox>
     </div>
+    <div class="settings-box" id="setDateTime" actionable
+        on-tap="onSetDateTimeTap_" hidden$="[[!canSetDateTime_]]">
+      <div class="start">
+        <div>$i18n{setDateTime}</div>
+      </div>
+      <button class="subpage-arrow" is="paper-icon-button-light"></button>
+    </div>
   </template>
   <script src="/date_time_page/date_time_page.js"></script>
 </dom-module>