Fixing crash upon window manager creation

chrome/browser/notifications/message_center_notifications_unittest.cc

 // Copyright 2014 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 "base/memory/scoped_ptr.h"
 #include "base/prefs/testing_pref_service.h"
 #include "base/run_loop.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/test/test_timeouts.h"
 #include "base/values.h"
@@ skipping 128 matching lines @@
       notification_manager()->Update(GetANotification("test"), &profile));
   EXPECT_TRUE(message_center()->NotificationCount() == 1);
 }
 
 #if defined(OS_CHROMEOS)
 TEST_F(MessageCenterNotificationManagerTest, MultiUserUpdates) {
   TestingProfile profile;
   std::string active_user_id = multi_user_util::GetUserIDFromProfile(&profile);
   chrome::MultiUserWindowManagerChromeOS* multi_user_window_manager =
       new chrome::MultiUserWindowManagerChromeOS(active_user_id);
+  multi_user_window_manager->Init();
   chrome::MultiUserWindowManager::SetInstanceForTest(
       multi_user_window_manager,
       chrome::MultiUserWindowManager::MULTI_PROFILE_MODE_SEPARATED);
   scoped_ptr<MultiUserNotificationBlockerChromeOS> blocker(
       new MultiUserNotificationBlockerChromeOS(
           message_center::MessageCenter::Get(),
           active_user_id));
   EXPECT_EQ(0u, message_center()->NotificationCount());
   notification_manager()->Add(GetANotification("test"), &profile);
   EXPECT_EQ(1u, message_center()->NotificationCount());
@@ skipping 45 matching lines @@
   TestingProfile profile;
   notification_manager()->Add(GetANotification("test"), &profile);
   message_center()->SetVisibility(message_center::VISIBILITY_MESSAGE_CENTER);
   run_loop()->RunUntilIdle();
   EXPECT_FALSE(notification_manager()->FirstRunTimerIsActive());
   EXPECT_FALSE(DidFirstRunPref());
 }
 
 #endif
 }  // namespace message_center