to properly choose named or indexed mode

Bug: chromium:1059738
Change-Id: Icd086fee31079f52770742afa54fc946acb1fd81
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2101005
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Auto-Submit: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66702}