CL 6822065 streamlined the login process by using a form. But if the form is submitted, the page is reloaded, which deletes the plugin instance, which closes the connection.
CL 6822065 streamlined the login process by using a form.
But if the form is submitted, the page is reloaded, which
deletes the plugin instance, which closes the connection.

This CL stops the form from being submitted.

BUG=none
TEST=Log in, and verify that the connection doesn't close after a few seconds.

Review URL: http://codereview.chromium.org/6869008

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@82092 0039d316-1c4b-4281-b951-d872f2087c98

pozdnyakov/chromium-crosswalk,zcbenz/cefode-chromium,Chilledheart/chromium,M4sse/chromium.src,robclark/chromium,PeterWangIntel/chromium-crosswalk,ltilve/chromium,Fireblend/chromium-crosswalk,dednal/chromium.src,Pluto-tv/chromium-crosswalk,crosswalk-project/chromium-crosswalk-efl,dushu1203/chromium.src,krieger-od/nwjs_chromium.src,hujiajie/pa-chromium,dednal/chromium.src,junmin-zhu/chromium-rivertrail,anirudhSK/chromium,Jonekee/chromium.src,markYoungH/chromium.src,junmin-zhu/chromium-rivertrail,PeterWangIntel/chromium-crosswalk,dednal/chromium.src,hgl888/chromium-crosswalk-efl,fujunwei/chromium-crosswalk,patrickm/chromium.src,ondra-novak/chromium.src,ondra-novak/chromium.src,crosswalk-project/chromium-crosswalk-efl,ltilve/chromium,mohamed--abdel-maksoud/chromium.src,mohamed--abdel-maksoud/chromium.src,timopulkkinen/BubbleFish,Fireblend/chromium-crosswalk,Chilledheart/chromium,Just-D/chromium-1,Jonekee/chromium.src,ondra-novak/chromium.src,Fireblend/chromium-crosswalk,timopulkkinen/BubbleFish,crosswalk-project/chromium-crosswalk-efl,junmin-zhu/chromium-rivertrail,pozdnyakov/chromium-crosswalk,zcbenz/cefode-chromium,dushu1203/chromium.src,timopulkkinen/BubbleFish,pozdnyakov/chromium-crosswalk,Fireblend/chromium-crosswalk,rogerwang/chromium,axinging/chromium-crosswalk,pozdnyakov/chromium-crosswalk,M4sse/chromium.src,hgl888/chromium-crosswalk,rogerwang/chromium,keishi/chromium,rogerwang/chromium,hujiajie/pa-chromium,Fireblend/chromium-crosswalk,nacl-webkit/chrome_deps,mohamed--abdel-maksoud/chromium.src,fujunwei/chromium-crosswalk,patrickm/chromium.src,jaruba/chromium.src,axinging/chromium-crosswalk,hgl888/chromium-crosswalk-efl,ltilve/chromium,hgl888/chromium-crosswalk,mohamed--abdel-maksoud/chromium.src,ChromiumWebApps/chromium,Chilledheart/chromium,nacl-webkit/chrome_deps,chuan9/chromium-crosswalk,bright-sparks/chromium-spacewalk,Jonekee/chromium.src,krieger-od/nwjs_chromium.src,rogerwang/chromium,chuan9/chromium-crosswalk,axinging/chromium-crosswalk,zcbenz/cefode-chromium,timopulkkinen/BubbleFish,anirudhSK/chromium,PeterWangIntel/chromium-crosswalk,ChromiumWebApps/chromium,Jonekee/chromium.src,hgl888/chromium-crosswalk-efl,krieger-od/nwjs_chromium.src,robclark/chromium,markYoungH/chromium.src,jaruba/chromium.src,hgl888/chromium-crosswalk-efl,M4sse/chromium.src,patrickm/chromium.src,chuan9/chromium-crosswalk,crosswalk-project/chromium-crosswalk-efl,hujiajie/pa-chromium,markYoungH/chromium.src,hgl888/chromium-crosswalk-efl,dednal/chromium.src,ltilve/chromium,Jonekee/chromium.src,axinging/chromium-crosswalk,ChromiumWebApps/chromium,axinging/chromium-crosswalk,fujunwei/chromium-crosswalk,ChromiumWebApps/chromium,Chilledheart/chromium,littlstar/chromium.src,hujiajie/pa-chromium,littlstar/chromium.src,Fireblend/chromium-crosswalk,markYoungH/chromium.src,keishi/chromium,junmin-zhu/chromium-rivertrail,keishi/chromium,keishi/chromium,axinging/chromium-crosswalk,ltilve/chromium,axinging/chromium-crosswalk,mogoweb/chromium-crosswalk,zcbenz/cefode-chromium,junmin-zhu/chromium-rivertrail,keishi/chromium,dushu1203/chromium.src,ondra-novak/chromium.src,fujunwei/chromium-crosswalk,rogerwang/chromium,robclark/chromium,junmin-zhu/chromium-rivertrail,Pluto-tv/chromium-crosswalk,markYoungH/chromium.src,Pluto-tv/chromium-crosswalk,littlstar/chromium.src,patrickm/chromium.src,hgl888/chromium-crosswalk,zcbenz/cefode-chromium,fujunwei/chromium-crosswalk,timopulkkinen/BubbleFish,anirudhSK/chromium,TheTypoMaster/chromium-crosswalk,axinging/chromium-crosswalk,junmin-zhu/chromium-rivertrail,crosswalk-project/chromium-crosswalk-efl,Jonekee/chromium.src,mohamed--abdel-maksoud/chromium.src,hgl888/chromium-crosswalk,fujunwei/chromium-crosswalk,hgl888/chromium-crosswalk-efl,TheTypoMaster/chromium-crosswalk,junmin-zhu/chromium-rivertrail,zcbenz/cefode-chromium,ChromiumWebApps/chromium,mogoweb/chromium-crosswalk,chuan9/chromium-crosswalk,hujiajie/pa-chromium,anirudhSK/chromium,hgl888/chromium-crosswalk,jaruba/chromium.src,patrickm/chromium.src,ltilve/chromium,pozdnyakov/chromium-crosswalk,dushu1203/chromium.src,krieger-od/nwjs_chromium.src,markYoungH/chromium.src,TheTypoMaster/chromium-crosswalk,crosswalk-project/chromium-crosswalk-efl,dushu1203/chromium.src,dushu1203/chromium.src,Jonekee/chromium.src,Just-D/chromium-1,nacl-webkit/chrome_deps,Just-D/chromium-1,TheTypoMaster/chromium-crosswalk,rogerwang/chromium,anirudhSK/chromium,hgl888/chromium-crosswalk-efl,ondra-novak/chromium.src,mogoweb/chromium-crosswalk,krieger-od/nwjs_chromium.src,bright-sparks/chromium-spacewalk,chuan9/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,junmin-zhu/chromium-rivertrail,fujunwei/chromium-crosswalk,ChromiumWebApps/chromium,Chilledheart/chromium,zcbenz/cefode-chromium,ltilve/chromium,crosswalk-project/chromium-crosswalk-efl,crosswalk-project/chromium-crosswalk-efl,Pluto-tv/chromium-crosswalk,axinging/chromium-crosswalk,littlstar/chromium.src,pozdnyakov/chromium-crosswalk,zcbenz/cefode-chromium,anirudhSK/chromium,markYoungH/chromium.src,robclark/chromium,hgl888/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,robclark/chromium,Fireblend/chromium-crosswalk,timopulkkinen/BubbleFish,hujiajie/pa-chromium,mogoweb/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,ChromiumWebApps/chromium,ondra-novak/chromium.src,keishi/chromium,PeterWangIntel/chromium-crosswalk,timopulkkinen/BubbleFish,hgl888/chromium-crosswalk-efl,ondra-novak/chromium.src,jaruba/chromium.src,Just-D/chromium-1,mohamed--abdel-maksoud/chromium.src,Just-D/chromium-1,jaruba/chromium.src,jaruba/chromium.src,M4sse/chromium.src,keishi/chromium,TheTypoMaster/chromium-crosswalk,hgl888/chromium-crosswalk-efl,littlstar/chromium.src,ltilve/chromium,fujunwei/chromium-crosswalk,krieger-od/nwjs_chromium.src,nacl-webkit/chrome_deps,Jonekee/chromium.src,Pluto-tv/chromium-crosswalk,hujiajie/pa-chromium,ChromiumWebApps/chromium,krieger-od/nwjs_chromium.src,krieger-od/nwjs_chromium.src,ondra-novak/chromium.src,axinging/chromium-crosswalk,robclark/chromium,chuan9/chromium-crosswalk,nacl-webkit/chrome_deps,PeterWangIntel/chromium-crosswalk,pozdnyakov/chromium-crosswalk,Just-D/chromium-1,anirudhSK/chromium,PeterWangIntel/chromium-crosswalk,zcbenz/cefode-chromium,chuan9/chromium-crosswalk,axinging/chromium-crosswalk,Chilledheart/chromium,rogerwang/chromium,mohamed--abdel-maksoud/chromium.src,zcbenz/cefode-chromium,mohamed--abdel-maksoud/chromium.src,nacl-webkit/chrome_deps,dednal/chromium.src,patrickm/chromium.src,Jonekee/chromium.src,pozdnyakov/chromium-crosswalk,Pluto-tv/chromium-crosswalk,timopulkkinen/BubbleFish,krieger-od/nwjs_chromium.src,markYoungH/chromium.src,bright-sparks/chromium-spacewalk,mohamed--abdel-maksoud/chromium.src,ChromiumWebApps/chromium,TheTypoMaster/chromium-crosswalk,ltilve/chromium,nacl-webkit/chrome_deps,Fireblend/chromium-crosswalk,pozdnyakov/chromium-crosswalk,mogoweb/chromium-crosswalk,mohamed--abdel-maksoud/chromium.src,anirudhSK/chromium,keishi/chromium,M4sse/chromium.src,patrickm/chromium.src,dushu1203/chromium.src,robclark/chromium,hujiajie/pa-chromium,nacl-webkit/chrome_deps,Chilledheart/chromium,M4sse/chromium.src,ChromiumWebApps/chromium,bright-sparks/chromium-spacewalk,ondra-novak/chromium.src,mogoweb/chromium-crosswalk,hgl888/chromium-crosswalk,M4sse/chromium.src,dushu1203/chromium.src,keishi/chromium,rogerwang/chromium,nacl-webkit/chrome_deps,mogoweb/chromium-crosswalk,ChromiumWebApps/chromium,hujiajie/pa-chromium,dednal/chromium.src,robclark/chromium,mohamed--abdel-maksoud/chromium.src,littlstar/chromium.src,dednal/chromium.src,Pluto-tv/chromium-crosswalk,jaruba/chromium.src,PeterWangIntel/chromium-crosswalk,keishi/chromium,dushu1203/chromium.src,nacl-webkit/chrome_deps,PeterWangIntel/chromium-crosswalk,bright-sparks/chromium-spacewalk,mogoweb/chromium-crosswalk,nacl-webkit/chrome_deps,junmin-zhu/chromium-rivertrail,markYoungH/chromium.src,rogerwang/chromium,robclark/chromium,pozdnyakov/chromium-crosswalk,mogoweb/chromium-crosswalk,M4sse/chromium.src,robclark/chromium,littlstar/chromium.src,timopulkkinen/BubbleFish,junmin-zhu/chromium-rivertrail,zcbenz/cefode-chromium,Chilledheart/chromium,hgl888/chromium-crosswalk-efl,M4sse/chromium.src,dushu1203/chromium.src,Fireblend/chromium-crosswalk,keishi/chromium,timopulkkinen/BubbleFish,crosswalk-project/chromium-crosswalk-efl,hgl888/chromium-crosswalk,krieger-od/nwjs_chromium.src,patrickm/chromium.src,Just-D/chromium-1,dednal/chromium.src,timopulkkinen/BubbleFish,mogoweb/chromium-crosswalk,chuan9/chromium-crosswalk,anirudhSK/chromium,fujunwei/chromium-crosswalk,bright-sparks/chromium-spacewalk,rogerwang/chromium,markYoungH/chromium.src,markYoungH/chromium.src,Jonekee/chromium.src,jaruba/chromium.src,Pluto-tv/chromium-crosswalk,Jonekee/chromium.src,dednal/chromium.src,Pluto-tv/chromium-crosswalk,jaruba/chromium.src,hujiajie/pa-chromium,dushu1203/chromium.src,dednal/chromium.src,krieger-od/nwjs_chromium.src,hujiajie/pa-chromium,PeterWangIntel/chromium-crosswalk,hgl888/chromium-crosswalk,bright-sparks/chromium-spacewalk,anirudhSK/chromium,chuan9/chromium-crosswalk,anirudhSK/chromium,ChromiumWebApps/chromium,jaruba/chromium.src,dednal/chromium.src,Chilledheart/chromium,bright-sparks/chromium-spacewalk,M4sse/chromium.src,anirudhSK/chromium,M4sse/chromium.src,patrickm/chromium.src,Just-D/chromium-1,pozdnyakov/chromium-crosswalk,littlstar/chromium.src,jaruba/chromium.src,Just-D/chromium-1,bright-sparks/chromium-spacewalk