Fixing None handling error for legacy_export

BUG=None
TEST=None

Change-Id: I69f249db73b103f13fcae23fd7ff4292cce9d482
Reviewed-on: https://gerrit.chromium.org/gerrit/37316
Reviewed-by: Jay Kim <yongjaek@chromium.org>
Tested-by: Jay Kim <yongjaek@chromium.org>
1 file changed