Get the backup calling through to the file backup helper.
This includes some cleanup to make the parameters match
between BackupService.onBackup and FileBackupHelper.performBackup.
diff --git a/include/utils/backup_helpers.h b/include/utils/backup_helpers.h
index 61bee34..137c5f1 100644
--- a/include/utils/backup_helpers.h
+++ b/include/utils/backup_helpers.h
@@ -1,7 +1,7 @@
#ifndef _UTILS_BACKUP_HELPERS_H
#define _UTILS_BACKUP_HELPERS_H
-int back_up_files(int oldSnapshotFD, int newSnapshotFD, int oldDataStream,
+int back_up_files(int oldSnapshotFD, int oldDataStream, int newSnapshotFD,
char const* fileBase, char const* const* files, int fileCount);
#define TEST_BACKUP_HELPERS 0