Revert of [sync] Replace FakeServer's implementation with LoopbackServer invocations.

components/sync/engine_impl/loopback_server/persistent_permanent_entity.h

 // Copyright 2014 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_ENGINE_IMPL_LOOPBACK_SERVER_PERSISTENT_PERMANENT_ENTITY_H_
 #define COMPONENTS_SYNC_ENGINE_IMPL_LOOPBACK_SERVER_PERSISTENT_PERMANENT_ENTITY_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 11 matching lines @@
                             const syncer::ModelType& model_type,
                             const std::string& name,
                             const std::string& parent_id,
                             const std::string& server_defined_unique_tag,
                             const sync_pb::EntitySpecifics& entity_specifics);
 
   ~PersistentPermanentEntity() override;
 
   // Factory function for PersistentPermanentEntity. |server_tag| should be a
   // globally unique identifier.
-  static std::unique_ptr<LoopbackServerEntity> CreateNew(
+  static std::unique_ptr<LoopbackServerEntity> Create(
       const syncer::ModelType& model_type,
       const std::string& server_tag,
       const std::string& name,
       const std::string& parent_server_tag);
 
   // Factory function for a top level PersistentPermanentEntity. Top level means
   // that the entity's parent is the root entity (no PersistentPermanentEntity
   // exists for root).
   static std::unique_ptr<LoopbackServerEntity> CreateTopLevel(
       const syncer::ModelType& model_type);
@@ skipping 16 matching lines @@
 
  private:
   // All member values have equivalent fields in SyncEntity.
   std::string server_defined_unique_tag_;
   std::string parent_id_;
 };
 
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_ENGINE_IMPL_LOOPBACK_SERVER_PERSISTENT_PERMANENT_ENTITY_H_