Revert of Revert of [MemSheriff]  should_reset_appcache is uninitialized (patchset #1 id:1 of https://codereview.chromium.org/763723002/)
Revert of Revert of [MemSheriff]  should_reset_appcache is uninitialized (patchset #1 id:1 of https://codereview.chromium.org/763723002/)

Reason for revert:
This is happening again after the patch has been re-landed.

NOTREECHECKS=true
NOTRY=true
BUG=436977
TBR=eustas@chromium.org

Original issue's description:
> Revert of [MemSheriff]  should_reset_appcache is uninitialized (patchset #1 id:1 of https://codereview.chromium.org/757373002/)
>
> Reason for revert:
> Patch that caused this error was reverted
>
> Original issue's description:
> > [MemSheriff]  should_reset_appcache is uninitialized
> >
> > TBR=eustas@chromium.org, earthdok@chromium.org
> > BUG=436977
> > NOTRY=true
> >
> > Committed: https://crrev.com/81ddc5757e8f6eb2056eb19fba658981957ac123
> > Cr-Commit-Position: refs/heads/master@{#305847}
>
> TBR=earthdok@chromium.org,groby@chromium.org
> NOTREECHECKS=true
> NOTRY=true
> BUG=436977
>
> Committed: https://crrev.com/3c9f53c2920631b8a551158c24edb8693fb3db75
> Cr-Commit-Position: refs/heads/master@{#305958}

TBR=groby@chromium.org,eustas@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=436977

Review URL: https://codereview.chromium.org/765823002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#305983}

fujunwei/chromium-crosswalk,jaruba/chromium.src,dushu1203/chromium.src,Just-D/chromium-1,fujunwei/chromium-crosswalk,hgl888/chromium-crosswalk,PeterWangIntel/chromium-crosswalk,markYoungH/chromium.src,mohamed--abdel-maksoud/chromium.src,chuan9/chromium-crosswalk,fujunwei/chromium-crosswalk,chuan9/chromium-crosswalk,M4sse/chromium.src,krieger-od/nwjs_chromium.src,Jonekee/chromium.src,axinging/chromium-crosswalk,hgl888/chromium-crosswalk,mohamed--abdel-maksoud/chromium.src,mohamed--abdel-maksoud/chromium.src,dednal/chromium.src,krieger-od/nwjs_chromium.src,Chilledheart/chromium,Pluto-tv/chromium-crosswalk,Chilledheart/chromium,Fireblend/chromium-crosswalk,Pluto-tv/chromium-crosswalk,hgl888/chromium-crosswalk,hgl888/chromium-crosswalk,axinging/chromium-crosswalk,dushu1203/chromium.src,dednal/chromium.src,markYoungH/chromium.src,chuan9/chromium-crosswalk,markYoungH/chromium.src,chuan9/chromium-crosswalk,Jonekee/chromium.src,mohamed--abdel-maksoud/chromium.src,Just-D/chromium-1,markYoungH/chromium.src,jaruba/chromium.src,Chilledheart/chromium,krieger-od/nwjs_chromium.src,axinging/chromium-crosswalk,PeterWangIntel/chromium-crosswalk,fujunwei/chromium-crosswalk,mohamed--abdel-maksoud/chromium.src,mohamed--abdel-maksoud/chromium.src,ltilve/chromium,Fireblend/chromium-crosswalk,axinging/chromium-crosswalk,jaruba/chromium.src,dednal/chromium.src,dednal/chromium.src,markYoungH/chromium.src,PeterWangIntel/chromium-crosswalk,M4sse/chromium.src,Jonekee/chromium.src,mohamed--abdel-maksoud/chromium.src,Just-D/chromium-1,PeterWangIntel/chromium-crosswalk,ltilve/chromium,markYoungH/chromium.src,jaruba/chromium.src,TheTypoMaster/chromium-crosswalk,M4sse/chromium.src,M4sse/chromium.src,Fireblend/chromium-crosswalk,Fireblend/chromium-crosswalk,hgl888/chromium-crosswalk,chuan9/chromium-crosswalk,dushu1203/chromium.src,krieger-od/nwjs_chromium.src,TheTypoMaster/chromium-crosswalk,dushu1203/chromium.src,Pluto-tv/chromium-crosswalk,ltilve/chromium,Jonekee/chromium.src,fujunwei/chromium-crosswalk,Just-D/chromium-1,Chilledheart/chromium,mohamed--abdel-maksoud/chromium.src,TheTypoMaster/chromium-crosswalk,Fireblend/chromium-crosswalk,hgl888/chromium-crosswalk,dushu1203/chromium.src,dushu1203/chromium.src,dednal/chromium.src,dushu1203/chromium.src,jaruba/chromium.src,PeterWangIntel/chromium-crosswalk,Jonekee/chromium.src,krieger-od/nwjs_chromium.src,markYoungH/chromium.src,dednal/chromium.src,ltilve/chromium,markYoungH/chromium.src,dednal/chromium.src,TheTypoMaster/chromium-crosswalk,Pluto-tv/chromium-crosswalk,M4sse/chromium.src,fujunwei/chromium-crosswalk,Pluto-tv/chromium-crosswalk,markYoungH/chromium.src,PeterWangIntel/chromium-crosswalk,jaruba/chromium.src,ltilve/chromium,markYoungH/chromium.src,axinging/chromium-crosswalk,hgl888/chromium-crosswalk,M4sse/chromium.src,Pluto-tv/chromium-crosswalk,axinging/chromium-crosswalk,Jonekee/chromium.src,TheTypoMaster/chromium-crosswalk,dushu1203/chromium.src,dednal/chromium.src,Pluto-tv/chromium-crosswalk,krieger-od/nwjs_chromium.src,chuan9/chromium-crosswalk,Jonekee/chromium.src,jaruba/chromium.src,ltilve/chromium,M4sse/chromium.src,Just-D/chromium-1,jaruba/chromium.src,chuan9/chromium-crosswalk,Just-D/chromium-1,Just-D/chromium-1,fujunwei/chromium-crosswalk,chuan9/chromium-crosswalk,Chilledheart/chromium,dednal/chromium.src,Jonekee/chromium.src,mohamed--abdel-maksoud/chromium.src,krieger-od/nwjs_chromium.src,Pluto-tv/chromium-crosswalk,axinging/chromium-crosswalk,Chilledheart/chromium,Jonekee/chromium.src,Chilledheart/chromium,krieger-od/nwjs_chromium.src,Fireblend/chromium-crosswalk,Chilledheart/chromium,Fireblend/chromium-crosswalk,krieger-od/nwjs_chromium.src,Jonekee/chromium.src,Fireblend/chromium-crosswalk,Just-D/chromium-1,M4sse/chromium.src,axinging/chromium-crosswalk,hgl888/chromium-crosswalk,Jonekee/chromium.src,mohamed--abdel-maksoud/chromium.src,axinging/chromium-crosswalk,markYoungH/chromium.src,PeterWangIntel/chromium-crosswalk,M4sse/chromium.src,axinging/chromium-crosswalk,hgl888/chromium-crosswalk,dednal/chromium.src,ltilve/chromium,jaruba/chromium.src,TheTypoMaster/chromium-crosswalk,chuan9/chromium-crosswalk,krieger-od/nwjs_chromium.src,TheTypoMaster/chromium-crosswalk,dednal/chromium.src,TheTypoMaster/chromium-crosswalk,Just-D/chromium-1,dushu1203/chromium.src,ltilve/chromium,mohamed--abdel-maksoud/chromium.src,krieger-od/nwjs_chromium.src,PeterWangIntel/chromium-crosswalk,Pluto-tv/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,Chilledheart/chromium,dushu1203/chromium.src,dushu1203/chromium.src,M4sse/chromium.src,M4sse/chromium.src,fujunwei/chromium-crosswalk,PeterWangIntel/chromium-crosswalk,jaruba/chromium.src,jaruba/chromium.src,axinging/chromium-crosswalk,Fireblend/chromium-crosswalk,fujunwei/chromium-crosswalk,ltilve/chromium