| // Copyright 2019 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/public/cpp/login_screen.h" |
| |
| #include "base/logging.h" |
| |
| namespace ash { |
| |
| namespace { |
| LoginScreen* g_instance = nullptr; |
| } |
| |
| // static |
| LoginScreen* LoginScreen::Get() { |
| return g_instance; |
| } |
| |
| LoginScreen::LoginScreen() { |
| DCHECK_EQ(nullptr, g_instance); |
| g_instance = this; |
| } |
| |
| LoginScreen::~LoginScreen() { |
| DCHECK_EQ(this, g_instance); |
| g_instance = nullptr; |
| } |
| |
| } // namespace ash |