Missed this fuzzer when implementing this class.
BUG=chromium:1255122
Change-Id: Ic5c7ef031db04a779734faeffa1d72d972dd2254
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/65880
Auto-Submit: Ryan Harrison <rharrison@chromium.org>
Commit-Queue: James Price <jrprice@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: James Price <jrprice@google.com>