Fix DSLParser clang-tidy warning

DSLParser is #ifdef'ed out, so this doesn't currently impact anything,
but is necessary to be able to reenable the DSLParser.

Change-Id: I76d48b1b855f42ba3bc8b0734199af6e2a88becb
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/449517
Reviewed-by: John Stiles <johnstiles@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
1 file changed