Revert of Revert of Protect the emptiness of Array prototype elements with a PropertyCell.

Revert of Revert of Protect the emptiness of Array prototype elements with a PropertyCell. (patchset #1 id:1 of https://codereview.chromium.org/1099203004/)

Reason for revert:
This was probably an infrastructure problem caused by the mac ninja/goma switch.

Original issue's description:
> Revert of Protect the emptiness of Array prototype elements with a PropertyCell. (patchset #7 id:120001 of https://codereview.chromium.org/1092043002/)
>
> Reason for revert:
> MAC GCSTRESS failure on new test.
>
> Original issue's description:
> > Protect the emptiness of Array prototype elements with a PropertyCell.
> >
> > Not just emptiness, but also a particular structure.
> >
> > BUG=v8:4044
> > LOG=N
>
> TBR=jkummerow@chromium.org
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=v8:4044
TBR=jkummerow@chromium.org,mvstanton@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4044
Committed: https://crrev.com/2631c9f5e383339bcceb18a93264c4a37a965f4a
Cr-Commit-Position: refs/heads/master@{#28000}

[Michael Achenbach, 2015-04-22 10:35:08]

Created Revert of Revert of Protect the emptiness of Array prototype elements
with a PropertyCell.

[commit-bot: I haz the power, 2015-04-22 10:35:14]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1052253003/1

[commit-bot: I haz the power, 2015-04-22 10:35:29]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-22 13:19:25]

Patchset 1 (id:??) landed as
https://crrev.com/2631c9f5e383339bcceb18a93264c4a37a965f4a
Cr-Commit-Position: refs/heads/master@{#28000}