Revert of [heap] Remove black pages and use black areas instead. (patchset #6 id:100001 of https://codereview.chromium.org/2160613002/ )

Reason for revert:
Suspected to cause crbug.com/630969

Original issue's description:
> [heap] Remove black pages and use black areas instead.
>
> BUG=630386
> LOG=n
>
> Committed: https://crrev.com/b008a0d5a3db80a854cb93d9c94d67bf2d780f2c
> Cr-Commit-Position: refs/heads/master@{#37967}

TBR=ulan@chromium.org,hpayer@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=630386

Review-Url: https://codereview.chromium.org/2176133002
Cr-Commit-Position: refs/heads/master@{#38006}