Signed settings refactoring: Proper caching and more tests.

chrome/browser/chromeos/user_cros_settings_provider.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_USER_CROS_SETTINGS_PROVIDER_H_
-#define CHROME_BROWSER_CHROMEOS_USER_CROS_SETTINGS_PROVIDER_H_
-#pragma once
-
-#include <string>
-
-#include "base/basictypes.h"
-#include "base/callback.h"
-#include "chrome/browser/chromeos/cros_settings_provider.h"
-#include "chrome/browser/chromeos/login/signed_settings_helper.h"
-
-class PrefService;
-
-namespace base {
-class ListValue;
-}
-
-namespace chromeos {
-
-// CrosSettingsProvider implementation that works with SignedSettings.
-// TODO(nkostylev): Rename this class to indicate that it is
-// SignedSettings specific.
-class UserCrosSettingsProvider : public CrosSettingsProvider {
- public:
-  UserCrosSettingsProvider();
-  virtual ~UserCrosSettingsProvider() {}
-
-  // Registers cached users settings in preferences.
-  static void RegisterPrefs(PrefService* local_state);
-
-  // Reloads values from device settings.
-  void Reload();
-
-  // CrosSettingsProvider implementation.
-  virtual const base::Value* Get(const std::string& path) const OVERRIDE;
-  virtual bool GetTrusted(const std::string& path,
-                          const base::Closure& callback) const OVERRIDE;
-  virtual bool HandlesSetting(const std::string& path) const OVERRIDE;
-
- private:
-  // CrosSettingsProvider implementation.
-  virtual void DoSet(const std::string& path,
-                     const base::Value& value) OVERRIDE;
-
-  DISALLOW_COPY_AND_ASSIGN(UserCrosSettingsProvider);
-};
-
-}  // namespace chromeos
-
-#endif  // CHROME_BROWSER_CHROMEOS_USER_CROS_SETTINGS_PROVIDER_H_