gtk: Change the message type of the ShowErrorBox() function to "warning".
gtk: Change the message type of the ShowErrorBox() function to "warning".

This patch changes the message type from error to warning. This is to match with
what views, win and cocoa is already doing.

I know the name of this function is misleading, I plan to rename it in a follow
up CL.

R=erg@chromium.org

Review URL: https://chromiumcodereview.appspot.com/10035035

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@132847 0039d316-1c4b-4281-b951-d872f2087c98

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