This is a follow up for
https://chromium-review.googlesource.com/c/v8/v8/+/2362918 .

The "slow" path in HandleLoadICSmiHandlerLoadNamedCase was using
only "receiver", even though it should've considered both "receiver"
and "holder".

Bug: v8:9237
Change-Id: I5d7ba1f72e8bf55f9533f648054abf5d25c85533
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2387576
Commit-Queue: Marja Hölttä <marja@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69671}