JS style nits

chrome/browser/resources/sync_setup_overlay.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() {
-  const OptionsPage = options.OptionsPage;
+  /** @const */ var OptionsPage = options.OptionsPage;
 
   // Variable to track if a captcha challenge was issued. If this gets set to
   // true, it stays that way until we are told about successful login from
   // the browser.  This means subsequent errors (like invalid password) are
   // rendered in the captcha state, which is basically identical except we
   // don't show the top error blurb 'Error Signing in' or the 'Create
   // account' link.
   var captchaChallengeActive_ = false;
 
   // True if the synced account uses a custom passphrase.
@@ skipping 50 matching lines @@
     showOverlay_: function() {
       OptionsPage.navigateToPage('syncSetup');
     },
 
     closeOverlay_: function() {
       OptionsPage.closeOverlay();
     },
 
     /** @inheritDoc */
     didShowPage: function() {
-      var forceLogin = document.location.hash == "#forceLogin";
+      var forceLogin = document.location.hash == '#forceLogin';
       var result = JSON.stringify({'forceLogin': forceLogin});
       chrome.send('SyncSetupAttachHandler', [result]);
     },
 
     /** @inheritDoc */
     didClosePage: function() {
       chrome.send('SyncSetupDidClosePage');
     },
 
     getEncryptionRadioCheckedValue_: function() {
@@ skipping 791 matching lines @@
 
   SyncSetupOverlay.showStopSyncingUI = function() {
     SyncSetupOverlay.getInstance().showStopSyncingUI_();
   };
 
   // Export
   return {
     SyncSetupOverlay: SyncSetupOverlay
   };
 });