chromeos: Move device shutdown handling out of chrome into ash

ash/test/test_shutdown_client.h

-// Copyright 2016 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.
-
-#ifndef ASH_TEST_TEST_SHUTDOWN_CLIENT_H_
-#define ASH_TEST_TEST_SHUTDOWN_CLIENT_H_
-
-#include "ash/public/interfaces/shutdown.mojom.h"
-#include "base/macros.h"
-
-namespace ash {
-namespace test {
-
-// Fake implementation of ShutdownClient that just logs requests to lock the
-// screen and shut down the device.
-class TestShutdownClient : public mojom::ShutdownClient {
- public:
-  TestShutdownClient();
-  ~TestShutdownClient() override;
-
-  int num_shutdown_requests() const { return num_shutdown_requests_; }
-
-  // LockStateControllerDelegate implementation.
-  void RequestShutdown() override;
-
- private:
-  int num_shutdown_requests_;
-
-  DISALLOW_COPY_AND_ASSIGN(TestShutdownClient);
-};
-
-}  // namespace test
-}  // namespace ash
-
-#endif  // ASH_TEST_TEST_SHUTDOWN_CLIENT_H_