Fix registration of internal plugins broken by rev 23501
Fix registration of internal plugins broken by rev 23501

Due to the plugin_list changes in rev 23501 internal plugins registered via a call to PluginList::RegisterInternalPlugin() are no longer being added to the plugin list when LoadPlugins() is called. Fix the problem by adding the internal plugins in LoadPlugins(). 

Original change by Marshall Greenblatt <magreenblatt@gmail.com> at http://codereview.chromium.org/173107.

Review URL: http://codereview.chromium.org/208026

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@26595 0039d316-1c4b-4281-b951-d872f2087c98

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