Signed settings refactoring: Proper caching and more tests.

chrome/browser/chromeos/login/signed_settings_temp_storage.h

-// Copyright (c) 2011 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 base::Value& value,
-                    PrefService* local_state);
-  static bool Retrieve(const std::string& name,
-                       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_