// TODO(haitaol): Make entries of act-once data types immutable.
SYNC_EXPORT bool IsActOnceDataType(ModelType model_type);
+// Returns set of model types that should be backed up before first sync.
+SYNC_EXPORT ModelTypeSet BackupTypes();
+
} // namespace syncer
#endif // SYNC_INTERNAL_API_PUBLIC_BASE_MODEL_TYPE_H_