This was causing an unrelated error that was complicating diagnosing
test failures with the command graph refactor.

Bug: angleproject:4029
Change-Id: I31df76e7ea1c7fb731b49e97ac8a527a165efd48
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2024331Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>