Populate versions on individual nodes in sync model and native bookmark model.

sync/internal_api/base_transaction.cc

 // Copyright (c) 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.
 
 #include "sync/internal_api/public/base_transaction.h"
 
 #include "sync/syncable/directory.h"
 #include "sync/syncable/nigori_handler.h"
 #include "sync/util/cryptographer.h"
 
@@ skipping 10 matching lines @@
 
 Cryptographer* BaseTransaction::GetCryptographer() const {
   return directory_->GetCryptographer(this->GetWrappedTrans());
 }
 
 ModelTypeSet BaseTransaction::GetEncryptedTypes() const {
   return directory_->GetNigoriHandler()->GetEncryptedTypes(
       this->GetWrappedTrans());
 }
 
+int64 BaseTransaction::GetModelVersion(ModelType type) {
+  return directory_->GetTransactionVersion(type);
+}
+
 }  // namespace syncer