Remove sandbox on Windows.

sandbox/win/src/process_mitigations_win32k_dispatcher.h

-// 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.
-
-#ifndef SANDBOX_SRC_PROCESS_MITIGATIONS_WIN32K_DISPATCHER_H_
-#define SANDBOX_SRC_PROCESS_MITIGATIONS_WIN32K_DISPATCHER_H_
-
-#include "base/macros.h"
-#include "sandbox/win/src/sandbox_policy_base.h"
-
-namespace sandbox {
-
-// This class sets up intercepts for the Win32K lockdown policy which is set
-// on Windows 8 and beyond.
-class ProcessMitigationsWin32KDispatcher : public Dispatcher {
- public:
-  explicit ProcessMitigationsWin32KDispatcher(PolicyBase* policy_base);
-  ~ProcessMitigationsWin32KDispatcher() override {}
-
-  // Dispatcher interface.
-  bool SetupService(InterceptionManager* manager, int service) override;
-
- private:
-  PolicyBase* policy_base_;
-
-  DISALLOW_COPY_AND_ASSIGN(ProcessMitigationsWin32KDispatcher);
-};
-
-}  // namespace sandbox
-
-#endif  // SANDBOX_SRC_PROCESS_MITIGATIONS_WIN32K_DISPATCHER_H_