MD Settings: Fix date and time layout

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

 <link rel="import" href="chrome://resources/html/cr.html">
 <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/cr_elements/policy/cr_policy_pref_indicator.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button-light.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-toggle-button/paper-toggle-button.html">
 <link rel="import" href="../controls/settings_dropdown_menu.html">
 <link rel="import" href="../controls/settings_toggle_button.html">
 <link rel="import" href="../i18n_setup.html">
 <link rel="import" href="../prefs/prefs_behavior.html">
 <link rel="import" href="../prefs/prefs_types.html">
 <link rel="import" href="../settings_shared_css.html">
 
 <dom-module id="settings-date-time-page">
   <template>
     <style include="settings-shared">
+      .embedded {
+        -webkit-padding-start: calc(
+          var(--settings-box-row-padding) + var(--settings-indent-width));

[michaelpg, 2017/02/17 22:22:12]

we have this calc in a few other places, is it worth sharing it, or trying to
use something like .list-frame here?

https://cs.chromium.org/search/?q=settings-box-row-padding%5C)%5Cs%5C%2B%5Csv...

[stevenjb, 2017/02/18 19:54:06]

list-frame messes with the top/bottom padding, but it makes sense to use a
single var for these (I'd meant to look for other uses but forgot, so thanks).
Done.

+      }
+
       settings-dropdown-menu {
         --md-select-width: 400px;
       }
 
       paper-toggle-button,
       cr-policy-pref-indicator {
         -webkit-margin-start: var(--checkbox-spacing);
       }
     </style>
     <div class="settings-box first">
-      <settings-dropdown-menu pref="{{prefs.cros.system.timezone}}"
-          menu-options="[[timeZoneList_]]"
-          disabled="[[timeZoneAutoDetect_]]">
-      </settings-dropdown-menu>
-    </div>
-    <div class="settings-box continuation">
       <div class="start">$i18n{timeZoneGeolocation}</div>
       <template is="dom-if" if="[[hasTimeZoneAutoDetectPolicy_]]" restamp>
         <cr-policy-pref-indicator pref="[[fakeTimeZonePolicyPref_]]">
         </cr-policy-pref-indicator>
       </template>
       <paper-toggle-button
           id="timeZoneAutoDetect"
           checked="[[timeZoneAutoDetect_]]"
           disabled="[[hasTimeZoneAutoDetectPolicy_]]"
           on-change="onTimeZoneAutoDetectChange_">
       </paper-toggle-button>
     </div>
-    <div class="settings-box continuation">
+    <div class="settings-box continuation embedded">
+      <settings-dropdown-menu pref="{{prefs.cros.system.timezone}}"
+          menu-options="[[timeZoneList_]]"
+          disabled="[[timeZoneAutoDetect_]]">
+      </settings-dropdown-menu>
+    </div>
+    <div class="settings-box">
       <settings-toggle-button class="start"
           pref="{{prefs.settings.clock.use_24hour_clock}}"
           label="$i18n{use24HourClock}">
       </settings-toggle-button>
     </div>
     <div class="settings-box" id="setDateTime" actionable
         on-tap="onSetDateTimeTap_" hidden$="[[!canSetDateTime_]]">
       <div class="start">$i18n{setDateTime}</div>
       <button class="subpage-arrow" is="paper-icon-button-light"
           aria-label="$i18n{setDateTime}"></button>
     </div>
   </template>
   <script src="date_time_page.js"></script>
 </dom-module>