[Sync UI] Disable the "Advanced..." button when there is an unrecoverable sync error.

chrome/browser/resources/options/personal_options.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() {
 
   var OptionsPage = options.OptionsPage;
   var ArrayDataModel = cr.ui.ArrayDataModel;
 
   // State variables.
@@ skipping 158 matching lines @@
       $('sync-overview').hidden = statusSet;
       $('sync-status').hidden = !statusSet;
       $('sync-status-text').innerHTML = status;
     },
 
     setSyncStatusErrorVisible_: function(visible) {
       visible ? $('sync-status').classList.add('sync-error') :
                 $('sync-status').classList.remove('sync-error');
     },
 
+    setCustomizeSyncButtonEnabled_: function(enabled) {
+      $('customize-sync').disabled = !enabled;
+    },
+
     setSyncActionLinkEnabled_: function(enabled) {
       $('sync-action-link').disabled = !enabled;
     },
 
     setSyncActionLinkLabel_: function(status) {
       $('sync-action-link').textContent = status;
 
       // link-button does is not zero-area when the contents of the button are
       // empty, so explicitly hide the element.
       $('sync-action-link').hidden = !status.length;
@@ skipping 119 matching lines @@
      */
     PersonalOptions.getLoggedInUserEmail = function() {
       return PersonalOptions.getInstance().userEmail_;
     };
   }
 
   // Forward public APIs to private implementations.
   [
     'hideSyncSection',
     'setAutoLoginVisible',
+    'setCustomizeSyncButtonEnabled',
     'setGtkThemeButtonEnabled',
     'setProfilesInfo',
     'setProfilesSectionVisible',
     'setStartStopButtonEnabled',
     'setStartStopButtonLabel',
     'setStartStopButtonVisible',
     'setSyncActionLinkEnabled',
     'setSyncActionLinkLabel',
     'setSyncEnabled',
     'setSyncSetupCompleted',
     'setSyncStatus',
     'setSyncStatusErrorVisible',
     'setThemesResetButtonEnabled',
     'updateAccountPicture',
   ].forEach(function(name) {
     PersonalOptions[name] = function(value) {
       PersonalOptions.getInstance()[name + '_'](value);
     };
   });
 
   // Export
   return {
     PersonalOptions: PersonalOptions
   };
 
 });