Add missing include to fix generated files bot

Change-Id: I93ff7e5f1062c6a85152c587fcedc34e9257dd27
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/319345
Reviewed-by: Brian Osman <brianosman@google.com>
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
1 file changed