In sync setup UI, reset onsubmit handler for sync configuration on load.

chrome/browser/resources/options/sync_setup_overlay.js

 // Copyright (c) 2011 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;
 
   // 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 40 matching lines @@
           logo_td.parentNode.appendChild(logo_td);
         }
         acct_text.textContent = translated_text.replace('Google','');
       }
 
       var self = this;
       $('gaia-login-form').onsubmit = function() {
         self.sendCredentialsAndClose_();
         return false;
       };
-      $('choose-data-types-form').onsubmit = function() {
-        self.sendConfiguration_();
-        return false;
-      };
       $('google-option').onchange = $('explicit-option').onchange = function() {
         self.onPassphraseRadioChanged_();
       };
       $('choose-datatypes-cancel').onclick = $('sync-setup-cancel').onclick =
           $('confirm-everything-cancel').onclick = function() {
         self.closeOverlay_();
       };
       $('customize-link').onclick = function() {
         self.showCustomizePage_(null, true);
       };
@@ skipping 293 matching lines @@
       var datatypeSelect = document.getElementById('sync-select-datatypes');
       var self = this;
       datatypeSelect.onchange = function() {
         var syncAll = this.selectedIndex == 0;
         self.setCheckboxesToKeepEverythingSynced_(syncAll);
       };
 
       this.resetPage_('sync-setup-configure');
       $('sync-setup-configure').hidden = false;
 
+      // onsubmit is changed when submitting a passphrase. Reset it to its
+      // default.
+      $('choose-data-types-form').onsubmit = function() {
+        self.sendConfiguration_();
+        return false;
+      };
+
       if (args) {
         if (!args['encryptionEnabled'])
           $('customize-sync-encryption').hidden = true;
         this.setCheckboxesAndErrors_(args);
 
         // Whether to display the 'Sync everything' confirmation page or the
         // customize data types page.
         var keepEverythingSynced = args['keepEverythingSynced'];
         this.usePassphrase_ = args['usePassphrase'];
         if (args['showSyncEverythingPage'] == false || this.usePassphrase_ ||
@@ skipping 336 matching lines @@
 
   SyncSetupOverlay.showSuccessAndSettingUp = function() {
     SyncSetupOverlay.getInstance().showSuccessAndSettingUp_();
   };
 
   // Export
   return {
     SyncSetupOverlay: SyncSetupOverlay
   };
 });