ChromeOS: Update browser option UI for automatic timezone detection.

chrome/browser/resources/options/browser_options.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.
 
 cr.exportPath('options');
 
 /**
  * @typedef {{actionLinkText: (string|undefined),
  *            childUser: (boolean|undefined),
  *            hasError: (boolean|undefined),
@@ skipping 389 matching lines @@
 
       // Date and time section (CrOS only).
       if (cr.isChromeOS) {
         if ($('set-time-button'))
           $('set-time-button').onclick = this.handleSetTime_.bind(this);
 
         // Timezone
         if (loadTimeData.getBoolean('enableTimeZoneTrackingOption')) {
           $('resolve-timezone-by-geolocation-selection').hidden = false;
           this.setSystemTimezoneManaged_(false);
+          $('timezone-value-select').disabled = loadTimeData.getBoolean(
+              'resolveTimezoneByGeolocationInitialValue');
         }
       }
 
       // Default browser section.
       if (!cr.isChromeOS) {
         if (!loadTimeData.getBoolean('showSetDefault')) {
           $('set-default-browser-section').hidden = true;
         }
         $('set-as-default-browser').onclick = function(event) {
           chrome.send('becomeDefaultBrowser');
@@ skipping 1686 matching lines @@
           $('profiles-supervised-dashboard-tip').hidden;
     },
 
     /**
      * Updates the date and time section with time sync information.
      * @param {boolean} canSetTime Whether the system time can be set.
      * @private
      */
     setCanSetTime_: function(canSetTime) {
       // If the time has been network-synced, it cannot be set manually.
-      $('time-synced-explanation').hidden = canSetTime;
       $('set-time').hidden = !canSetTime;
     },
 
     /**
      * Handle the 'set date and time' button click.
      * @private
      */
     handleSetTime_: function() {
       chrome.send('showSetTime');
     },
@@ skipping 58 matching lines @@
     'setHotwordRetrainLinkVisible',
     'setNativeThemeButtonEnabled',
     'setNetworkPredictionValue',
     'setNowSectionVisible',
     'setHighContrastCheckboxState',
     'setAllHotwordSectionsVisible',
     'setMetricsReportingCheckboxState',
     'setMetricsReportingSettingVisibility',
     'setProfilesInfo',
     'setSpokenFeedbackCheckboxState',
+    'setSystemTimezoneManaged',
     'setThemesResetButtonEnabled',
     'setVirtualKeyboardCheckboxState',
     'setupPageZoomSelector',
     'setupProxySettingsButton',
     'setAudioHistorySectionVisible',
     'showBluetoothSettings',
     'showCreateProfileError',
     'showCreateProfileSuccess',
     'showCreateProfileWarning',
     'showHotwordAlwaysOnSection',
@@ skipping 59 matching lines @@
       }
       button.textContent = loadTimeData.getString(strId);
     };
   }
 
   // Export
   return {
     BrowserOptions: BrowserOptions
   };
 });