mustash: Convert TraySupervisedUserTest to AshTest

ash/test/ash_test_helper.cc

 // Copyright 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 "ash/test/ash_test_helper.h"
 
 #include "ash/accelerators/accelerator_controller_delegate_aura.h"
 #include "ash/common/material_design/material_design_controller.h"
 #include "ash/common/test/material_design_controller_test_api.h"
 #include "ash/common/test/test_session_state_delegate.h"
@@ skipping 162 matching lines @@
     bluez_dbus_manager_initialized_ = false;
   }
   if (dbus_thread_manager_initialized_) {
     chromeos::DBusThreadManager::Shutdown();
     dbus_thread_manager_initialized_ = false;
   }
 #endif
 
   ui::TerminateContextFactoryForTests();
 
-  // Need to reset the initial login status.
-  TestSystemTrayDelegate::SetInitialLoginStatus(LoginStatus::USER);
   TestSystemTrayDelegate::SetSystemUpdateRequired(false);
 
   ui::ShutdownInputMethodForTesting();
   zero_duration_mode_.reset();
 
   CHECK(!::wm::ScopedCaptureClient::IsActive());
 
   views_delegate_.reset();
 }
 
@@ skipping 21 matching lines @@
 bool AshTestHelper::SupportsMultipleDisplays() {
 #if defined(OS_WIN)
   return false;
 #else
   return true;
 #endif
 }
 
 }  // namespace test
 }  // namespace ash