Add synchronous and asynchronous methods to ManagedUserSyncService to get the list of managed users.

chrome/browser/ui/webui/options/browser_options_handler.cc

 // 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.
 
 #include "chrome/browser/ui/webui/options/browser_options_handler.h"
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 13 matching lines @@
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/chrome_page_zoom.h"
 #include "chrome/browser/custom_home_pages_table_model.h"
 #include "chrome/browser/download/download_prefs.h"
 #include "chrome/browser/gpu/gpu_mode_manager.h"
 #include "chrome/browser/lifetime/application_lifetime.h"
 #include "chrome/browser/managed_mode/managed_user_registration_utility.h"
 #include "chrome/browser/managed_mode/managed_user_service.h"
 #include "chrome/browser/managed_mode/managed_user_service_factory.h"
+#include "chrome/browser/managed_mode/managed_user_sync_service.h"
+#include "chrome/browser/managed_mode/managed_user_sync_service_factory.h"
 #include "chrome/browser/prefs/scoped_user_pref_update.h"
 #include "chrome/browser/prefs/session_startup_pref.h"
 #include "chrome/browser/printing/cloud_print/cloud_print_proxy_service.h"
 #include "chrome/browser/printing/cloud_print/cloud_print_proxy_service_factory.h"
 #include "chrome/browser/printing/cloud_print/cloud_print_url.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_info_cache.h"
 #include "chrome/browser/profiles/profile_info_util.h"
 #include "chrome/browser/profiles/profile_metrics.h"
 #include "chrome/browser/profiles/profile_shortcut_manager.h"
@@ skipping 1794 matching lines @@
 bool BrowserOptionsHandler::IsValidExistingManagedUserId(
     const std::string& existing_managed_user_id) const {
   if (existing_managed_user_id.empty())
     return true;
 
   if (!CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kAllowCreateExistingManagedUsers)) {
     return false;
   }
 
-  DictionaryPrefUpdate update(Profile::FromWebUI(web_ui())->GetPrefs(),
-                              prefs::kManagedUsers);
-  DictionaryValue* dict = update.Get();
+  Profile* profile = Profile::FromWebUI(web_ui());
+  const DictionaryValue* dict =
+      ManagedUserSyncServiceFactory::GetForProfile(profile)->GetManagedUsers();
   if (!dict->HasKey(existing_managed_user_id))
     return false;
 
   // Check if this managed user already exists on this machine.
   const ProfileInfoCache& cache =
       g_browser_process->profile_manager()->GetProfileInfoCache();
   for (size_t i = 0; i < cache.GetNumberOfProfiles(); ++i) {
     if (existing_managed_user_id == cache.GetManagedUserIdOfProfileAtIndex(i))
       return false;
   }
   return true;
 }
 
 }  // namespace options