PART2: Make SignedSettings use proper Value types instead of string all around the place.

chrome/browser/chromeos/login/signed_settings_temp_storage.h

 // Copyright (c) 2010 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 CHROME_BROWSER_CHROMEOS_LOGIN_SIGNED_SETTINGS_TEMP_STORAGE_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_SIGNED_SETTINGS_TEMP_STORAGE_H_
 #pragma once
 
 #include <string>
 
 #include "base/basictypes.h"
+#include "base/values.h"
 
 class PrefService;
 
 namespace chromeos {
 
 // There is need (proxy settings at OOBE stage) to store settings
 // (that are normally go into SignedSettings storage)
 // before owner has been assigned (hence no key is available).
 // This class serves as a transient storage in that case.
 class SignedSettingsTempStorage {
  public:
   // Registers required pref section.
   static void RegisterPrefs(PrefService* local_state);
 
   static bool Store(const std::string& name,
-                    const std::string& value,
+                    const base::Value& value,
                     PrefService* local_state);
   static bool Retrieve(const std::string& name,
-                       std::string* value,
+                       base::Value** value,
                        PrefService* local_state);
 
   // Call this after owner has been assigned to persist settings
   // into SignedSettings storage.
   static void Finalize(PrefService* local_state);
 
  private:
   SignedSettingsTempStorage() {}
   DISALLOW_COPY_AND_ASSIGN(SignedSettingsTempStorage);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_SIGNED_SETTINGS_TEMP_STORAGE_H_