Fix integration tests in src/chrome and src/extensions so that we can turn on IO thread checks wi...

chrome/browser/notifications/message_center_settings_controller.cc

 // Copyright (c) 2013 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/notifications/message_center_settings_controller.h"
 
 #include <algorithm>
 #include <string>
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/i18n/string_compare.h"
 #include "base/strings/utf_string_conversions.h"
+#include "base/threading/thread_restrictions.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "build/build_config.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/notifications/application_notifier_source.h"
 #include "chrome/browser/notifications/web_page_notifier_source.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_attributes_entry.h"
 #include "chrome/browser/profiles/profile_attributes_storage.h"
 #include "chrome/browser/profiles/profile_manager.h"
@@ skipping 304 matching lines @@
     observer.NotifierEnabledChanged(id, enabled);
 }
 
 void MessageCenterSettingsController::DispatchNotifierGroupChanged() {
   for (message_center::NotifierSettingsObserver& observer : observers_)
     observer.NotifierGroupChanged();
 }
 
 #if defined(OS_CHROMEOS)
 void MessageCenterSettingsController::CreateNotifierGroupForGuestLogin() {
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
   // Already created.
   if (!notifier_groups_.empty())
     return;
 
   user_manager::UserManager* user_manager = user_manager::UserManager::Get();
   // |notifier_groups_| can be empty in login screen too.
   if (!user_manager->IsLoggedInAsGuest())
     return;
 
   user_manager::User* user = user_manager->GetActiveUser();
@@ skipping 61 matching lines @@
         FROM_HERE,
         base::Bind(
             &MessageCenterSettingsController::CreateNotifierGroupForGuestLogin,
             weak_factory_.GetWeakPtr()));
   }
 #endif
 
   if (notify)
     DispatchNotifierGroupChanged();
 }