Refcount browser process in BaseLoginDisplayHost so message loop does not exit

chrome/browser/chromeos/login/wizard_in_process_browser_test.cc

 // 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.
 
 #include "chrome/browser/chromeos/login/wizard_in_process_browser_test.h"
 
 #include "base/message_loop.h"
 #include "chrome/browser/chromeos/login/base_login_display_host.h"
 #include "chrome/browser/chromeos/login/wizard_controller.h"
 #include "chrome/browser/ui/browser.h"
@@ skipping 16 matching lines @@
   if (!screen_name_.empty()) {
     browser::ShowLoginWizard(screen_name_.c_str(), gfx::Size(1024, 600));
     controller_ = WizardController::default_controller();
     host_ = BaseLoginDisplayHost::default_host();
   }
   return NULL;
 }
 
 void WizardInProcessBrowserTest::CleanUpOnMainThread() {
   // LoginDisplayHost owns controllers and all windows.
-  delete host_;
+  MessageLoopForUI::current()->DeleteSoon(FROM_HERE,host_);
 
   // Observers and what not are notified after the views are deleted, which
   // happens after a delay (because they are contained in a WidgetGtk which
   // delays deleting itself). Run the message loop until we know the wizard
   // has been deleted.
   ui_test_utils::WaitForNotification(
       NotificationType::WIZARD_CONTENT_VIEW_DESTROYED);
 }
 
 }  // namespace chromeos