Componentize PrefSyncableService and support classes.

chrome/browser/prefs/pref_service_syncable_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_PREFS_PREF_SERVICE_SYNCABLE_FACTORY_H_
-#define CHROME_BROWSER_PREFS_PREF_SERVICE_SYNCABLE_FACTORY_H_
-
-#include "base/prefs/pref_service_factory.h"
-
-class PrefModelAssociatorClient;
-class PrefServiceSyncable;
-
-namespace base {
-class CommandLine;
-}
-
-namespace policy {
-class BrowserPolicyConnector;
-class PolicyService;
-}
-
-namespace user_prefs {
-class PrefRegistrySyncable;
-}
-
-// A PrefServiceFactory that also knows how to build a
-// PrefServiceSyncable, and may know about Chrome concepts such as
-// PolicyService.
-class PrefServiceSyncableFactory : public base::PrefServiceFactory {
- public:
-  PrefServiceSyncableFactory();
-  ~PrefServiceSyncableFactory() override;
-
-#if defined(ENABLE_CONFIGURATION_POLICY)
-  // Set up policy pref stores using the given policy service and connector.
-  void SetManagedPolicies(policy::PolicyService* service,
-                          policy::BrowserPolicyConnector* connector);
-  void SetRecommendedPolicies(policy::PolicyService* service,
-                              policy::BrowserPolicyConnector* connector);
-#endif
-
-  void SetPrefModelAssociatorClient(
-      PrefModelAssociatorClient* pref_model_associator_client);
-
-  scoped_ptr<PrefServiceSyncable> CreateSyncable(
-      user_prefs::PrefRegistrySyncable* registry);
-
- private:
-  PrefModelAssociatorClient* pref_model_associator_client_;
-
-  DISALLOW_COPY_AND_ASSIGN(PrefServiceSyncableFactory);
-};
-
-#endif  // CHROME_BROWSER_PREFS_PREF_SERVICE_SYNCABLE_FACTORY_H_