Remove sandbox on Windows.

sandbox/win/src/policy_broker.h

-// Copyright (c) 2006-2010 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_POLICY_BROKER_H_
-#define SANDBOX_SRC_POLICY_BROKER_H_
-
-#include "sandbox/win/src/interception.h"
-
-namespace sandbox {
-
-class TargetProcess;
-
-// Initializes global imported symbols from ntdll.
-bool InitGlobalNt();
-
-// Sets up interceptions not controlled by explicit policies.
-bool SetupBasicInterceptions(InterceptionManager* manager,
-                             bool is_csrss_connected);
-
-// Sets up imports from NTDLL for the given target process so the interceptions
-// can work.
-bool SetupNtdllImports(TargetProcess *child);
-
-}  // namespace sandbox
-
-#endif  // SANDBOX_SRC_POLICY_BROKER_H_