Revert of Fixing all of problems found by vc++ /analyze in GCM code (patchset #1 id:1 of https://codereview.chromium.org/713573003/)
Revert of Fixing all of problems found by vc++ /analyze in GCM code (patchset #1 id:1 of https://codereview.chromium.org/713573003/)

Reason for revert:
Reverting since it's causing a crash on canary.

Original issue's description:
> Fixing all of problems found by vc++ /analyze in GCM code
>
> There was only a minor (harmless) case of variable shadowing.
>
> BUG=427616
> R=zea@chromium.org
>
> Committed: https://crrev.com/3e021981ccc2be8de7443ff1a18439551b22ea75
> Cr-Commit-Position: refs/heads/master@{#303338}

TBR=zea@chromium.org,brucedawson@chromium.org,fgorski@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=427616

Review URL: https://codereview.chromium.org/712793003

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#303396}

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