If the type check fails, we should return. Otherwise we hit an error in
ToLocalChecked below.

R=yangguo@chromium.org

Bug: chromium:1061673
Change-Id: I39e5b90b3574d0d2b77f5d704023aabb1c8130cb
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2116035Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66901}