Revert of Keep track of array buffers in new space separately

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
Committed: https://crrev.com/64ba57ce612ad698dec64135a5cf57990ffd55f6
Cr-Commit-Position: refs/heads/master@{#28979}

[Benedikt Meurer, 2015-06-12 06:28:54]

Created Revert of Keep track of array buffers in new space separately

[commit-bot: I haz the power, 2015-06-12 06:29:00]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1178403003/1

[commit-bot: I haz the power, 2015-06-12 06:29:11]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-06-12 06:29:33]

Patchset 1 (id:??) landed as
https://crrev.com/64ba57ce612ad698dec64135a5cf57990ffd55f6
Cr-Commit-Position: refs/heads/master@{#28979}