chromium/components/sync/model/metadata_change_list.h

// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef COMPONENTS_SYNC_MODEL_METADATA_CHANGE_LIST_H_
#define COMPONENTS_SYNC_MODEL_METADATA_CHANGE_LIST_H_

#include <string>

namespace sync_pb {
class DataTypeState;
class EntityMetadata;
}  // namespace sync_pb

namespace syncer {

// Interface used by the processor and service to communicate about metadata.
// The purpose of the interface is to record changes to data type global and
// per entity metadata for the purpose of propagating changes to the datatype
// specific storage implementation.
// The implementation of the interface is supposed to keep the record of all
// updated / deleted metadata records and provide a mechanism to enumerate
// them. If there are multiple UpdateMetadata / ClearMetadata calls made for the
// same metadata record the last one is supposed to win.
class MetadataChangeList { … };

}  // namespace syncer

#endif  // COMPONENTS_SYNC_MODEL_METADATA_CHANGE_LIST_H_