Signed settings refactoring: Proper caching and more tests.

chrome/browser/chromeos/signed_settings_migration_helper.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_SIGNED_SETTINGS_MIGRATION_HELPER_H_
+#define CHROME_BROWSER_CHROMEOS_SIGNED_SETTINGS_MIGRATION_HELPER_H_
+#pragma once
+
+#include "chrome/browser/chromeos/login/ownership_status_checker.h"
+#include "chrome/browser/chromeos/login/signed_settings_helper.h"
+#include "chrome/browser/prefs/pref_value_map.h"
+#include "content/public/browser/notification_observer.h"
+#include "content/public/browser/notification_registrar.h"
+
+namespace base {
+class Value;
+}
+
+namespace chromeos {
+
+// This class provides the means to migrate settings to the signed settings
+// store. It does one of three things - store the settings in the policy blob
+// immediately if the current user is the owner. Uses the
+// SignedSettingsCache if there is no owner yet, or waits for an
+// OWNERSHIP_CHECKED notification to delay the storing until the owner has
+// logged in.
+class SignedSettingsMigrationHelper : public content::NotificationObserver {
+ public:
+  SignedSettingsMigrationHelper();
+  virtual ~SignedSettingsMigrationHelper();
+
+  // Adds a value to be migrated. The class takes ownership of the |value|.
+  void AddMigrationValue(const std::string& path, base::Value* value);
+
+  // Initiates values migration. If the device is already owned this will
+  // happen immediately if not it will wait for ownership login and finish the
+  // migration then.
+  void MigrateValues(void);
+
+  // NotificationObserver overrides:
+  virtual void Observe(int type,
+                       const content::NotificationSource& source,
+                       const content::NotificationDetails& details) OVERRIDE;
+
+ private:
+  // Does the actual migration when ownership has been confirmed.
+  void DoMigrateValues(OwnershipService::Status status,
+                       bool current_user_is_owner);
+
+  content::NotificationRegistrar registrar_;
+  scoped_ptr<OwnershipStatusChecker> ownership_checker_;
+  PrefValueMap migration_values_;
+
+  DISALLOW_COPY_AND_ASSIGN(SignedSettingsMigrationHelper);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_CHROMEOS_SIGNED_SETTINGS_MIGRATION_HELPER_H_