Revert of [heap] Give marking functions for incremental marking more precise names. (patchset #3 id:40001 of https://codereview.chromium.org/2173773002/ )

Reason for revert:
Breaks Roll https://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_rel_ng/builds/271267/steps/browser_tests%20%28with%20patch%29%20on%20Ubuntu-12.04/logs/MaterialHistoryBrowserTest.DrawerTest

Original issue's description:
> [heap] Give marking functions for incremental marking more precise names.
>
> BUG=
>
> Committed: https://crrev.com/4ac08c97f0c26cca3c0687b7349c929a4db2df43
> Cr-Commit-Position: refs/heads/master@{#38141}

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

Review-Url: https://codereview.chromium.org/2197583002
Cr-Commit-Position: refs/heads/master@{#38175}