Revert of Reland: Fix logic for incremental marking steps on tenured allocation (patchset #4 id:60001 of https://codereview.chromium.org/1077153004/)

Reason for revert:
[Sheriff] Speculative revert, see:
https://code.google.com/p/chromium/issues/detail?id=506875

Original issue's description:
> Reland: Fix logic for incremental marking steps on tenured allocation
>
> BUG=
>
> Committed: https://crrev.com/5000650bde2ec0bc90d959b529c97aea20385043
> Cr-Commit-Position: refs/heads/master@{#29442}

TBR=hpayer@chromium.org,erikcorry@chromium.org
BUG=chromium:506875
LOG=n
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Review URL: https://codereview.chromium.org/1212063005

Cr-Commit-Position: refs/heads/master@{#29494}