Refactor windows dependency out of UpdaterState class.

components/update_client/updater_state.h

 // Copyright (c) 2016 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 COMPONENTS_UPDATE_CLIENT_UPDATER_STATE_H_
 #define COMPONENTS_UPDATE_CLIENT_UPDATER_STATE_H_
 
 #include <map>
 #include <memory>
 #include <string>
@@ skipping 29 matching lines @@
 
   // Builds the map of state attributes by serializing this object state.
   Attributes BuildAttributes() const;
 
   static std::string GetUpdaterName();
   static base::Version GetUpdaterVersion(bool is_machine);
   static bool IsAutoupdateCheckEnabled();
   static bool IsEnterpriseManaged();
   static base::Time GetUpdaterLastStartedAU(bool is_machine);
   static base::Time GetUpdaterLastChecked(bool is_machine);
-  static base::Time GetUpdaterTimeValue(bool is_machine,
-                                        const wchar_t* value_name);
+
   static int GetUpdatePolicy();
 
   static std::string NormalizeTimeDelta(const base::TimeDelta& delta);
 
   bool is_machine_ = false;
   std::string updater_name_;
   base::Version updater_version_;
   base::Time last_autoupdate_started_;
   base::Time last_checked_;
   bool is_enterprise_managed_ = false;
   bool is_autoupdate_check_enabled_ = false;
   int update_policy_ = 0;
 };
 
 }  // namespace update_client
 
 #endif  // COMPONENTS_UPDATE_CLIENT_UPDATER_STATE_H_