This CL removes an unnecessary CHECK and replaces it with
exception throwing instead.

Bug: chromium:1223107
Change-Id: If99bf289fe3a2ed5cd675ee071e9b39038e38129
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2983201
Auto-Submit: Maya Lekova <mslekova@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75361}