[Sync] Move the last things out of core/.

components/sync/core/sync_manager_factory.h

-// Copyright 2012 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 COMPONENTS_SYNC_CORE_SYNC_MANAGER_FACTORY_H_
-#define COMPONENTS_SYNC_CORE_SYNC_MANAGER_FACTORY_H_
-
-#include <memory>
-#include <string>
-
-#include "base/macros.h"
-
-namespace syncer {
-
-class SyncManager;
-
-// Helper class to allow dependency injection of the SyncManager in tests.
-class SyncManagerFactory {
- public:
-  SyncManagerFactory();
-  virtual ~SyncManagerFactory();
-
-  virtual std::unique_ptr<SyncManager> CreateSyncManager(
-      const std::string& name);
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(SyncManagerFactory);
-};
-
-}  // namespace syncer
-
-#endif  // COMPONENTS_SYNC_CORE_SYNC_MANAGER_FACTORY_H_