Dawn: fix compile.

Change-Id: Ibbba2824224f5c4b9ed0a68cafe58e0e91c22a31
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/250097
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
1 file changed