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diff --git a/security/sandbox/chromium/sandbox/win/src/filesystem_policy.h b/security/sandbox/chromium/sandbox/win/src/filesystem_policy.h
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+++ b/security/sandbox/chromium/sandbox/win/src/filesystem_policy.h
@@ -0,0 +1,112 @@
+// Copyright (c) 2006-2008 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_FILESYSTEM_POLICY_H__
+#define SANDBOX_SRC_FILESYSTEM_POLICY_H__
+
+#include <stdint.h>
+
+#include <string>
+
+#include "sandbox/win/src/crosscall_server.h"
+#include "sandbox/win/src/nt_internals.h"
+#include "sandbox/win/src/policy_low_level.h"
+#include "sandbox/win/src/sandbox_policy.h"
+
+namespace sandbox {
+
+enum IsBroker { BROKER_FALSE, BROKER_TRUE };
+
+// This class centralizes most of the knowledge related to file system policy
+class FileSystemPolicy {
+ public:
+  // Creates the required low-level policy rules to evaluate a high-level
+  // policy rule for File IO, in particular open or create actions.
+  // 'name' is the file or directory name.
+  // 'semantics' is the desired semantics for the open or create.
+  // 'policy' is the policy generator to which the rules are going to be added.
+  static bool GenerateRules(const wchar_t* name,
+                            TargetPolicy::Semantics semantics,
+                            LowLevelPolicy* policy);
+
+  // Add basic file system rules.
+  static bool SetInitialRules(LowLevelPolicy* policy);
+
+  // Performs the desired policy action on a create request with an
+  // API that is compatible with the IPC-received parameters.
+  // 'client_info' : the target process that is making the request.
+  // 'eval_result' : The desired policy action to accomplish.
+  // 'file' : The target file or directory.
+  static bool CreateFileAction(EvalResult eval_result,
+                               const ClientInfo& client_info,
+                               const std::wstring& file,
+                               uint32_t attributes,
+                               uint32_t desired_access,
+                               uint32_t file_attributes,
+                               uint32_t share_access,
+                               uint32_t create_disposition,
+                               uint32_t create_options,
+                               HANDLE* handle,
+                               NTSTATUS* nt_status,
+                               ULONG_PTR* io_information);
+
+  // Performs the desired policy action on an open request with an
+  // API that is compatible with the IPC-received parameters.
+  // 'client_info' : the target process that is making the request.
+  // 'eval_result' : The desired policy action to accomplish.
+  // 'file' : The target file or directory.
+  static bool OpenFileAction(EvalResult eval_result,
+                             const ClientInfo& client_info,
+                             const std::wstring& file,
+                             uint32_t attributes,
+                             uint32_t desired_access,
+                             uint32_t share_access,
+                             uint32_t open_options,
+                             HANDLE* handle,
+                             NTSTATUS* nt_status,
+                             ULONG_PTR* io_information);
+
+  // Performs the desired policy action on a query request with an
+  // API that is compatible with the IPC-received parameters.
+  static bool QueryAttributesFileAction(EvalResult eval_result,
+                                        const ClientInfo& client_info,
+                                        const std::wstring& file,
+                                        uint32_t attributes,
+                                        FILE_BASIC_INFORMATION* file_info,
+                                        NTSTATUS* nt_status);
+
+  // Performs the desired policy action on a query request with an
+  // API that is compatible with the IPC-received parameters.
+  static bool QueryFullAttributesFileAction(
+      EvalResult eval_result,
+      const ClientInfo& client_info,
+      const std::wstring& file,
+      uint32_t attributes,
+      FILE_NETWORK_OPEN_INFORMATION* file_info,
+      NTSTATUS* nt_status);
+
+  // Performs the desired policy action on a set_info request with an
+  // API that is compatible with the IPC-received parameters.
+  static bool SetInformationFileAction(EvalResult eval_result,
+                                       const ClientInfo& client_info,
+                                       HANDLE target_file_handle,
+                                       void* file_info,
+                                       uint32_t length,
+                                       uint32_t info_class,
+                                       IO_STATUS_BLOCK* io_block,
+                                       NTSTATUS* nt_status);
+};
+
+// Expands the path and check if it's a reparse point. Returns false if the path
+// cannot be trusted.
+bool PreProcessName(std::wstring* path);
+
+// Corrects global paths to have a correctly escaped NT prefix at the
+// beginning. If the name has no NT prefix (either normal or escaped)
+// add the escaped form to the string
+std::wstring FixNTPrefixForMatch(const std::wstring& name);
+
+}  // namespace sandbox
+
+#endif  // SANDBOX_SRC_FILESYSTEM_POLICY_H__