No visible effect yet, but this will enable better error reporting in a
future CL.
Change-Id: I09e1c5d3bb423a7ce42701f15c4bb142b0a9473c
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/524638
Reviewed-by: Brian Salomon <bsalomon@google.com>
Reviewed-by: John Stiles <johnstiles@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>