skhdr::AdaptiveGlobalToneMap: Add missing SK_API

Bug: 468928417
Change-Id: I4735da65127bbcc14bd7cab9deb292f8bf68f141
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/1137917
Commit-Queue: Christopher Cameron <ccameron@google.com>
Reviewed-by: Kaylee Lubick <kjlubick@google.com>
Reviewed-by: Christopher Cameron <ccameron@google.com>
1 file changed