Fix collision of two CLs landing with different expectations.
Change-Id: I44eb904b552f635e37dd51dcc94329fbc34af031
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/94685
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: Austin Eng <enga@chromium.org>