Delete athena/

athena/screen_lock/screen_lock_manager_base.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 "athena/screen_lock/screen_lock_manager_base.h"
-
-#include "base/logging.h"
-
-namespace athena {
-namespace {
-
-ScreenLockManager* instance = nullptr;
-
-}  // namespace
-
-ScreenLockManagerBase::ScreenLockManagerBase() {
-  DCHECK(!instance);
-  instance = this;
-}
-
-ScreenLockManagerBase::~ScreenLockManagerBase() {
-  DCHECK_EQ(instance, this);
-  instance = nullptr;
-}
-
-// static
-ScreenLockManager* ScreenLockManager::Get() {
-  return instance;
-}
-
-// static
-void ScreenLockManager::Shutdown() {
-  if (instance) {
-    delete instance;
-    DCHECK(!instance);
-  }
-}
-
-}  // namespace athena