Revert of [heap] Invoke incremental marking step before allocation. (patchset #1 id:1 of https://codereview.chromium.org/2464393002/ )

Reason for revert:
Performance regression on Octane and V8 runtime stats.

Original issue's description:
> [heap] Invoke incremental marking step before allocation.
>
> This ensures that the newly allocated object immediatly precedes the
> linear allocation area, which is needed for allocation folding.
>
> For more info see:
> https://bugs.chromium.org/p/chromium/issues/detail?id=659165#c13
>
> BUG=chromium:659165

TBR=hpayer@chromium.org,mlippautz@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:659165

Review-Url: https://codereview.chromium.org/2472043002
Cr-Commit-Position: refs/heads/master@{#40713}