Fix "missing plugin" error in linux chrome. On linux first check succeeded, while next one will fail and no plugin information got returned. So, I am inverting logic a little bit. IFF check for plugin file succeeded, we omit all subsequent for this file in the process.
Fix "missing plugin" error in linux chrome.
On linux first check succeeded, while next one will fail and no plugin information got returned.
So, I am inverting logic a little bit. IFF check for plugin file succeeded, we omit all
subsequent for this file in the process.

BUG=none
TEST=Check PDF plugin is working in Chrome linux sandbox, and no PDF plugin is in Chromium build.


Review URL: http://codereview.chromium.org/3181003

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@55784 0039d316-1c4b-4281-b951-d872f2087c98

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