Check-in rlz code to src\rlz from http://code.google.com/p/rlz/.

rlz/win/lib/rlz_lib.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.
+//
+// A library to manage RLZ information for access-points shared
+// across different client applications.
+//
+// All functions return true on success and false on error.
+// This implemenation is thread safe.
+//
+// Each prototype mentions the registry access requirements:
+//
+// HKLM read:  Will work from any process and at any privilege level on Vista.
+// HKCU read:  Calls made from the SYSTEM account must pass the current user's
+//             SID as the optional 'sid' param. Can be called from low integrity
+//             process on Vista.
+// HKCU write: Calls made from the SYSTEM account must pass the current user's
+//             SID as the optional 'sid' param. Calls require at least medium
+//             integrity on Vista (e.g. Toolbar will need to use their broker)
+// HKLM write: Calls must be made from an account with admin rights. No SID
+//             need be passed when running as SYSTEM.
+// Functions which do not access registry will be marked with "no restrictions".
+
+#ifndef RLZ_WIN_LIB_RLZ_LIB_H_
+#define RLZ_WIN_LIB_RLZ_LIB_H_
+
+// Clients can get away by just including rlz/lib/rlz_lib.h. This file only
+// contains function definitions for files used by tests. It's mostly kept
+// around for backwards-compatibility.
+
+#include "rlz/lib/rlz_lib.h"
+
+#include "base/win/registry.h"
+
+namespace rlz_lib {
+
+#if defined(OS_WIN)
+
+// Initialize temporary HKLM/HKCU registry hives used for testing.
+// Testing RLZ requires reading and writing to the Windows registry.  To keep
+// the tests isolated from the machine's state, as well as to prevent the tests
+// from causing side effects in the registry, HKCU and HKLM are overridden for
+// the duration of the tests. RLZ tests don't expect the HKCU and KHLM hives to
+// be empty though, and this function initializes the minimum value needed so
+// that the test will run successfully.
+//
+// The two arguments to this function should be the keys that will represent
+// the HKLM and HKCU registry hives during the tests.  This function should be
+// called *before* the hives are overridden.
+void InitializeTempHivesForTesting(const base::win::RegKey& temp_hklm_key,
+                                   const base::win::RegKey& temp_hkcu_key);
+#endif  // defined(OS_WIN)
+
+}  // namespace rlz_lib
+
+#endif  // RLZ_WIN_LIB_RLZ_LIB_H_