Revert of EventSender: Added checks for missing arguments (patchset #4 id:60001 of https://codereview.chromium.org/584203003/)
Revert of EventSender: Added checks for missing arguments (patchset #4 id:60001 of https://codereview.chromium.org/584203003/)

Reason for revert:
This makes the fast/events/hit-test-counts.html layout test fail. Reverting for now.

http://test-results.appspot.com/dashboards/flakiness_dashboard.html#tests=fast%2Fevents%2Fhit-test-counts.html&testType=layout-tests

Original issue's description:
> Added checks for missing arguments in event_sender.cc. Also simplified the uses of x & y in EventSender::GestureEvent.
>
> BUG=415970
>
> Committed: https://crrev.com/302907463636d2ddfe25c5381bd1f2b64016d1c6
> Cr-Commit-Position: refs/heads/master@{#296256}

TBR=dpranke@chromium.org,rbyers@chromium.org,earthdok@chromium.org,mustaq@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=415970

Review URL: https://codereview.chromium.org/600733002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#296357}

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