Revert of Keep track of array buffers in new space separately (patchset #4 id:60001 of https://codereview.chromium.org/1133773002/)

Reason for revert:
GC stress unhappy

Original issue's description:
> Keep track of array buffers in new space separately
>
> BUG=v8:3996
> R=hpayer@chromium.org
> LOG=n
>
> Committed: https://crrev.com/506397d0a4241c19f5fab890e49e22d1d9b28bdc
> Cr-Commit-Position: refs/heads/master@{#28978}

TBR=hpayer@chromium.org,jochen@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:3996

Review URL: https://codereview.chromium.org/1178403003

Cr-Commit-Position: refs/heads/master@{#28979}