Sync setup overlay: Don't call showCustomizePage with null args

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 Page = cr.ui.pageManager.Page;
   /** @const */ var PageManager = cr.ui.pageManager.PageManager;
 
   // True if the synced account uses a custom passphrase.
   var usePassphrase_ = false;
@@ skipping 264 matching lines @@
 
     /**
      * Sets the disabled property of all input elements within the 'Customize
      * Sync Preferences' screen. This is used to prohibit the user from changing
      * the inputs after confirming the customized sync preferences, or resetting
      * the state when re-showing the dialog.
      * @param {boolean} disabled True if controls should be set to disabled.
      * @private
      */
     setInputElementsDisabledState_: function(disabled) {
+      var self = this;
       var configureElements =
           $('customize-sync-preferences').querySelectorAll('input');
       for (var i = 0; i < configureElements.length; i++)
         configureElements[i].disabled = disabled;
       $('sync-select-datatypes').disabled = disabled;
 
       $('customize-link').hidden = disabled;
       $('customize-link').disabled = disabled;
       $('customize-link').onclick = disabled ? null : function() {
-        SyncSetupOverlay.showCustomizePage(null,
+        SyncSetupOverlay.showCustomizePage(self.syncConfigureArgs_,
                                            DataTypeSelection.SYNC_EVERYTHING);
         return false;
       };
     },
 
     /**
      * Shows or hides the sync data type checkboxes in the advanced sync
      * settings dialog. Also initializes |dataTypeBoxes_| with their values, and
      * makes their onclick handlers update |dataTypeBoxes_|.
      * @param {Object} args The configuration data used to show/hide UI.
@@ skipping 287 matching lines @@
       $('sync-existing-passphrase-container').hidden = true;
 
       $('sync-select-datatypes').selectedIndex = index;
       this.setDataTypeCheckboxesEnabled_(
           index == DataTypeSelection.CHOOSE_WHAT_TO_SYNC);
 
       // Give the OK button focus only when the dialog wasn't already visible.
       if (wasCustomizePageHidden)
         $('choose-datatypes-ok').focus();
 
-      if (args && args.showPassphrase) {
+      if (args.showPassphrase) {
         this.showPassphraseContainer_(args);
         // Give the passphrase field focus only when the dialog wasn't already
         // visible.
         if (wasCustomizePageHidden)
           $('passphrase').focus();
       } else {
         // We only show the 'Use Default' link if we're not prompting for an
         // existing passphrase.
         $('use-default-link').hidden = false;
         $('use-default-link').disabled = false;
@@ skipping 173 matching lines @@
 
   SyncSetupOverlay.showStopSyncingUI = function() {
     SyncSetupOverlay.getInstance().showStopSyncingUI_();
   };
 
   // Export
   return {
     SyncSetupOverlay: SyncSetupOverlay
   };
 });