Add ManagedUserSettingsService and a SupervisedUserPrefStore using it.

chrome/browser/managed_mode/managed_user_settings_service_factory.h

+// Copyright 2013 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_MANAGED_MODE_MANAGED_USER_SETTINGS_SERVICE_FACTORY_H_
+#define CHROME_BROWSER_MANAGED_MODE_MANAGED_USER_SETTINGS_SERVICE_FACTORY_H_
+
+#include "base/memory/singleton.h"
+#include "chrome/browser/managed_mode/managed_users.h"
+#include "components/browser_context_keyed_service/browser_context_keyed_service_factory.h"
+
+class ManagedUserSettingsService;
+class Profile;
+
+class ManagedUserSettingsServiceFactory
+    : public BrowserContextKeyedServiceFactory {
+ public:
+  static ManagedUserSettingsService* GetForProfile(Profile* profile);
+
+  static ManagedUserSettingsServiceFactory* GetInstance();
+
+ private:
+  friend struct DefaultSingletonTraits<ManagedUserSettingsServiceFactory>;
+
+  ManagedUserSettingsServiceFactory();
+  virtual ~ManagedUserSettingsServiceFactory();
+
+  // BrowserContextKeyedServiceFactory:
+  virtual BrowserContextKeyedService* BuildServiceInstanceFor(
+      content::BrowserContext* profile) const OVERRIDE;
+  virtual content::BrowserContext* GetBrowserContextToUse(
+      content::BrowserContext* context) const OVERRIDE;
+};
+
+#endif  // CHROME_BROWSER_MANAGED_MODE_MANAGED_USER_SETTINGS_SERVICE_FACTORY_H_