Revert of [heap] Reland decrease large object limit for regular heap objects. (patchset #3 id:40001 of https://codereview.chromium.org/1401173003/ )

Reason for revert:
Still one failing test on Windows.

Original issue's description:
> [heap] Reland decrease large object limit for regular heap objects.
>
> BUG=
>
> Committed: https://crrev.com/9b91bf3a630b5382080ba1d7f9f3e88de3de8a95
> Cr-Commit-Position: refs/heads/master@{#31228}

TBR=mlippautz@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Review URL: https://codereview.chromium.org/1395653003

Cr-Commit-Position: refs/heads/master@{#31239}