Revert of Release unused web views when under memory pressure. (patchset #5 id:100001 of https://codereview.chromium.org/1708643002/ )

Reason for revert:
TypedUrlSyncableServiceTest.DeleteUrlAndVisits fails on Win and CROS ASAN:

Win:
https://build.chromium.org/p/chromium.win/builders/Win7%20Tests%20%28dbg%29%281%29/builds/46063/steps/components_unittests/logs/TypedUrlSyncableServiceTest.DeleteUrlAndVisits

https://build.chromium.org/p/chromium.win/buildstatus?builder=Win7%20Tests%20%28dbg%29%281%29&number=46064

https://build.chromium.org/p/chromium.win/buildstatus?builder=Win7%20Tests%20%28dbg%29%281%29&number=46063

CROS ASAN:

https://build.chromium.org/p/chromium.memory/builders/Linux%20Chromium%20OS%20ASan%20LSan%20Tests%20%281%29/builds/9861/steps/components_unittests/logs/TypedUrlSyncableServiceTest.DeleteUrlAndVisits

https://build.chromium.org/p/chromium.memory/buildstatus?builder=Linux%20Chromium%20OS%20ASan%20LSan%20Tests%20%281%29&number=9861

Original issue's description:
> Release unused web views when under memory pressure.
>
> AccountConsistencyService and GaiaAuthFetcherIOS both use web views
> internally to manipulate cookies. Once allocated, those web views were
> never released to avoid having to re-allocate them later (which is
> expensive).
>
> Those web views are now released when they are unused and the app is
> under memory pressure.
>
> BUG=587487
>
> Committed: https://crrev.com/8a730bd4d690e5c9f9b3639cbedec5b5dc2bbe12
> Cr-Commit-Position: refs/heads/master@{#376431}

TBR=msarda@chromium.org,zea@chromium.org,bzanotti@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=587487

Review URL: https://codereview.chromium.org/1713973003

Cr-Commit-Position: refs/heads/master@{#376445}

0 files changed, 0 insertions, 0 deletions