[Linux] Call g_thread_init() in UtilityThreadImpl::OnLoadPlugins().
[Linux] Call g_thread_init() in UtilityThreadImpl::OnLoadPlugins().

This allows plugins that call into glib for NP_GetMIMEDescription to load
without crashing.

BUG=71661,105252
TEST=Have libTotem plugins installed, go to about:plugins and they are present.


Review URL: http://codereview.chromium.org/8774048

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@113021 0039d316-1c4b-4281-b951-d872f2087c98

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