Revert of [Sync] Make directory types registration explicit in ModelTypeRegistry

components/sync/driver/glue/sync_backend_host_core.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 COMPONENTS_SYNC_DRIVER_GLUE_SYNC_BACKEND_HOST_CORE_H_
 #define COMPONENTS_SYNC_DRIVER_GLUE_SYNC_BACKEND_HOST_CORE_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 88 matching lines @@
   // potentially blocking) syncapi operations.
   //
   // Called to perform initialization of the syncapi on behalf of
   // SyncEngine::Initialize.
   void DoInitialize(SyncEngine::InitParams params);
 
   // Called to perform credential update on behalf of
   // SyncEngine::UpdateCredentials.
   void DoUpdateCredentials(const SyncCredentials& credentials);
 
-  // Switches sync engine into configuration mode. In this mode only initial
-  // data for newly enabled types is downloaded from server. No local changes
-  // are committed to server.
-  void DoStartConfiguration();
-
   // Called to tell the syncapi to start syncing (generally after
   // initialization and authentication).
-  void DoStartSyncing(base::Time last_poll_time);
+  void DoStartSyncing(const ModelSafeRoutingInfo& routing_info,
+                      base::Time last_poll_time);
 
   // Called to set the passphrase for encryption.
   void DoSetEncryptionPassphrase(const std::string& passphrase,
                                  bool is_explicit);
 
   // Called to decrypt the pending keys.
   void DoSetDecryptionPassphrase(const std::string& passphrase);
 
   // Called to turn on encryption of all sync data as well as
   // reencrypt everything.
@@ skipping 121 matching lines @@
   base::ThreadChecker thread_checker_;
 
   base::WeakPtrFactory<SyncBackendHostCore> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncBackendHostCore);
 };
 
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_DRIVER_GLUE_SYNC_BACKEND_HOST_CORE_H_