Add UIPI support for sandbox alternate desktop

sandbox/win/src/sandbox_policy_base.h

 // Copyright (c) 2011 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_WIN_SRC_SANDBOX_POLICY_BASE_H_
 #define SANDBOX_WIN_SRC_SANDBOX_POLICY_BASE_H_
 
 #include <windows.h>
 
 #include <list>
@@ skipping 139 matching lines @@
   std::vector<base::string16> blacklisted_dlls_;
   // This is a map of handle-types to names that we need to close in the
   // target process. A null set means we need to close all handles of the
   // given type.
   HandleCloser handle_closer_;
   std::vector<base::string16> capabilities_;
   scoped_ptr<AppContainerAttributes> appcontainer_list_;
 
   static HDESK alternate_desktop_handle_;
   static HWINSTA alternate_winstation_handle_;
+  static IntegrityLevel alternate_desktop_integrity_label_;
 
   DISALLOW_COPY_AND_ASSIGN(PolicyBase);
 };
 
 }  // namespace sandbox
 
 #endif  // SANDBOX_WIN_SRC_SANDBOX_POLICY_BASE_H_