Add a regenerate button to regenerate the password in Windows.

rlz/win/lib/registry_util.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.
-
-#ifndef RLZ_WIN_LIB_REGISTRY_UTIL_H_
-#define RLZ_WIN_LIB_REGISTRY_UTIL_H_
-
-namespace base {
-namespace win {
-class RegKey;
-}  // namespace win
-}  // namespace base
-
-namespace rlz_lib {
-
-bool RegKeyReadValue(base::win::RegKey& key,
-                     const wchar_t* name,
-                     char* value,
-                     size_t* value_size);
-
-bool RegKeyWriteValue(base::win::RegKey& key,
-                      const wchar_t* name,
-                      const char* value);
-
-bool HasUserKeyAccess(bool write_access);
-
-}  // namespace rlz_lib
-
-#endif  // RLZ_WIN_LIB_REGISTRY_UTIL_H_