Revert of [heap] Prepare code for smaller large object allocation limit than max allocatable memory.

Revert of [heap] Prepare code for smaller large object allocation limit than max allocatable memory. (patchset #10 id:180001 of https://codereview.chromium.org/1361853005/ )

Reason for revert:
[Sheriff] Need to revert for reverting https://codereview.chromium.org/1358703003/

Original issue's description:
> [heap] Prepare heap for smaller large object allocation limit than max allocatable memory.
>
> BUG=chromium:524425
> LOG=n
>
> Committed: https://crrev.com/c2bce747993c445daf78975392e587bff20c6677
> Cr-Commit-Position: refs/heads/master@{#31107}

TBR=mlippautz@chromium.org,mstarzinger@chromium.org,hpayer@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:524425
Committed: https://crrev.com/9af0174f03e5a93c330d8dfad1aba16915d9c8ff
Cr-Commit-Position: refs/heads/master@{#31129}

[Michael Achenbach, 2015-10-06 17:11:10]

Created Revert of [heap] Prepare code for smaller large object allocation limit
than max allocatable memory.

[commit-bot: I haz the power, 2015-10-06 17:11:20]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1376413005/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1376413005/1

[commit-bot: I haz the power, 2015-10-06 17:11:36]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-10-06 17:11:46]

Patchset 1 (id:??) landed as
https://crrev.com/9af0174f03e5a93c330d8dfad1aba16915d9c8ff
Cr-Commit-Position: refs/heads/master@{#31129}