Revert of Tenure descriptor arrays. (patchset #1 id:1 of https://codereview.chromium.org/1526663002/ )

Reason for revert:
Regresses memory consumption.

BUG=571180,571657
LOG=n

Original issue's description:
> Tenure descriptor arrays.
>
> BUG=
>
> Committed: https://crrev.com/74bc69166de8cfb967e79b5c8cc31c2a76490dc8
> Cr-Commit-Position: refs/heads/master@{#32846}

TBR=ishell@chromium.org,ulan@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.

Review URL: https://codereview.chromium.org/1606003002

Cr-Commit-Position: refs/heads/master@{#33394}