Replace DFATAL with ERROR in PluginDataRemover::OnError.
Replace DFATAL with ERROR in PluginDataRemover::OnError.

It was failing regularly with Chrome OS build on the Login screen.

TBR=jam@chromium.org
BUG=None
TEST=Manual: no DCHECK when click 'Add user', 'Cancel' and 'Add user' again on the Login screen.

Review URL: http://codereview.chromium.org/9019010

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@115327 0039d316-1c4b-4281-b951-d872f2087c98

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