Revert of easy-unlock: Only show "Set up" UI for en-US.

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.define('options', function() {
   var OptionsPage = options.OptionsPage;
   var Page = cr.ui.pageManager.Page;
   var PageManager = cr.ui.pageManager.PageManager;
   var ArrayDataModel = cr.ui.ArrayDataModel;
   var RepeatingButton = cr.ui.RepeatingButton;
@@ skipping 1007 matching lines @@
           syncData.hasUnrecoverableError ||
           (!syncData.setupCompleted && !$('sync-action-link').hidden);
     },
 
     /**
      * Update the UI depending on whether the current profile has a pairing for
      * Easy Unlock.
      * @param {boolean} hasPairing True if the current profile has a pairing.
      */
     updateEasyUnlock_: function(hasPairing) {
-      // Hide "Set up" UI when the language is not en-US.
-      // TODO(xiyuan): Remove this after M38.
-      if (loadTimeData.getBoolean('easyUnlockAllowed')) {
-        $('easy-unlock-section').hidden =
-            !hasPairing && navigator.language != 'en-US';
-      }
-
       $('easy-unlock-setup').hidden = hasPairing;
       $('easy-unlock-enable').hidden = !hasPairing;
       if (!hasPairing && EasyUnlockTurnOffOverlay.getInstance().visible) {
         EasyUnlockTurnOffOverlay.dismiss();
       }
     },
 
     /**
      * Update the UI depending on whether the current profile manages any
      * supervised users.
@@ skipping 958 matching lines @@
       }
       button.textContent = loadTimeData.getString(strId);
     };
   }
 
   // Export
   return {
     BrowserOptions: BrowserOptions
   };
 });