mash: remove the LockStateControllerDelegate.

chrome/browser/chromeos/power/session_state_controller_delegate_chromeos.h

-// Copyright (c) 2012 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 CHROME_BROWSER_CHROMEOS_POWER_SESSION_STATE_CONTROLLER_DELEGATE_CHROMEOS_H_
-#define CHROME_BROWSER_CHROMEOS_POWER_SESSION_STATE_CONTROLLER_DELEGATE_CHROMEOS_H_
-
-#include "ash/wm/lock_state_controller.h"
-#include "base/compiler_specific.h"
-#include "base/macros.h"
-#include "base/memory/weak_ptr.h"
-
-namespace chromeos {
-
-class SessionStateControllerDelegateChromeos
-    : public ash::LockStateControllerDelegate {
- public:
-  SessionStateControllerDelegateChromeos();
-  ~SessionStateControllerDelegateChromeos() override;
-
- private:
-  // ash::LockStateControllerDelegate implementation.
-  void RequestShutdown() override;
-
-  base::WeakPtrFactory<SessionStateControllerDelegateChromeos> weak_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(SessionStateControllerDelegateChromeos);
-};
-
-}  // namespace chromeos
-
-#endif  // CHROME_BROWSER_CHROMEOS_POWER_SESSION_STATE_CONTROLLER_DELEGATE_CHROMEOS_H_