An empty MIME type doesn't match any plugin, no matter what they may claim.
An empty MIME type doesn't match any plugin, no matter what they may claim.

BUG=9549
TEST=install Silverlight,
  'run_webkit_tests.sh --force LayoutTests/webarchive/loading', see no crashes
  (timeouts are OK)
Review URL: http://codereview.chromium.org/60021

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@13051 0039d316-1c4b-4281-b951-d872f2087c98

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