Revert of Oilpan: catch some self-referential leaks (main thread.)

Revert of Oilpan: catch some self-referential leaks (main thread.) (patchset #7 id:120001 of https://codereview.chromium.org/1275863002/ )

Reason for revert:
Breaking compilation on chromium trybots:
  error: use of undeclared identifier 'stderr'
  https://codereview.chromium.org/1277473003/


Original issue's description:
> Oilpan: catch some self-referential leaks (main thread.)
> 
> Track the number of SelfKeepAlive<>s that are currently active on
> the main thread, so as to be able to detect if any remains on
> shutdown. A clear indication of a leak, if so.
> 
> Also add some debugging support for detecting thread shutdown
> leaks due to Persistent<>s not being released; see
> PersistentRegion::dumpLivePersistents() and ThreadState::cleanup().
> 
> R=haraken
> BUG=420515
> 
> Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=200163

TBR=oilpan-reviews@chromium.org,haraken@chromium.org,sigbjornf@opera.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=420515
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=200168

[hiroshige, 2015-08-07 14:23:00]

Created Revert of Oilpan: catch some self-referential leaks (main thread.)

[commit-bot: I haz the power, 2015-08-07 14:23:05]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1280543004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1280543004/1

[commit-bot: I haz the power, 2015-08-07 14:23:34]

Committed patchset #1 (id:1) as
https://src.chromium.org/viewvc/blink?view=rev&revision=200168

[sof, 2015-08-07 14:33:36]

lgtm, thanks.

[haraken, 2015-08-07 16:20:52]

LGTM