[Sync] Make SESSIONS an implicit type

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 */ 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
@@ skipping 251 matching lines @@
       var result = JSON.stringify({
         'syncAllDataTypes': syncAll,
         'bookmarksSynced': syncAll || $('bookmarks-checkbox').checked,
         'preferencesSynced': syncAll || $('preferences-checkbox').checked,
         'themesSynced': syncAll || $('themes-checkbox').checked,
         'passwordsSynced': syncAll || $('passwords-checkbox').checked,
         'autofillSynced': syncAll || $('autofill-checkbox').checked,
         'extensionsSynced': syncAll || $('extensions-checkbox').checked,
         'typedUrlsSynced': syncAll || $('typed-urls-checkbox').checked,
         'appsSynced': syncAll || $('apps-checkbox').checked,
-        'sessionsSynced': syncAll || $('sessions-checkbox').checked,
+        'tabsSynced': syncAll || $('tabs-checkbox').checked,
         'encryptAllData': encryptAllData,
         'usePassphrase': usePassphrase,
         'isGooglePassphrase': googlePassphrase,
         'passphrase': customPassphrase
       });
       chrome.send('SyncSetupConfigure', [result]);
     },
 
     /**
      * Sets the disabled property of all input elements within the 'Customize
@@ skipping 80 matching lines @@
         $('omnibox-item').hidden = false;
       } else {
         $('omnibox-item').hidden = true;
       }
       if (args.appsRegistered) {
         $('apps-checkbox').checked = args.appsSynced;
         $('apps-item').hidden = false;
       } else {
         $('apps-item').hidden = true;
       }
-      if (args.sessionsRegistered) {
-        $('sessions-checkbox').checked = args.sessionsSynced;
-        $('sessions-item').hidden = false;
+      if (args.tabsRegistered) {
+        $('tabs-checkbox').checked = args.tabsSynced;
+        $('tabs-item').hidden = false;
       } else {
-        $('sessions-item').hidden = true;
+        $('tabs-item').hidden = true;
       }
 
       this.setCheckboxesToKeepEverythingSynced_(args.syncAllDataTypes);
     },
 
     setEncryptionRadios_: function(args) {
       if (args.encryptAllData) {
         $('encrypt-all-option').checked = true;
         this.disableEncryptionRadioGroup_();
       } else {
@@ skipping 662 matching lines @@
 
   SyncSetupOverlay.showStopSyncingUI = function() {
     SyncSetupOverlay.getInstance().showStopSyncingUI_();
   };
 
   // Export
   return {
     SyncSetupOverlay: SyncSetupOverlay
   };
 });