Noticed when working on a related feature.

Bug: angleproject:3630
Change-Id: I82638d37ee6d27dc824d5782c96387f0d000d585
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2305040Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>