Revert of [heap] Reland "Make non-atomic markbit operations consistent with atomic ones." (patchset #2 id:20001 of https://codereview.chromium.org/2860323003/ )

Reason for revert:
box2d failures on buildbot

Original issue's description:
> [heap] Reland "Make non-atomic markbit operations consistent with atomic ones."
>
> Now non-atomic color transition operations return a boolean indicating
> whether the transition succeeded or not.
>
> This allows to replace color check and transition operations with a
> single transition operation. For example:
>
> if (IsWhite(object)) {
>   WhiteToBlack(object);
>   Foo();
> }
>
> becomes
>
> if (WhiteToBlack(object)) {
>   Foo();
> }
>
> BUG=chromium:694255
>
> CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_chromium_rel_ng
>
> Review-Url: https://codereview.chromium.org/2860323003
> Cr-Commit-Position: refs/heads/master@{#45123}
> Committed: https://chromium.googlesource.com/v8/v8/+/c0a65cd295301f334e2bbfcce46a937cd708beec

TBR=mlippautz@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:694255

Review-Url: https://codereview.chromium.org/2863953002
Cr-Commit-Position: refs/heads/master@{#45127}