Revert change (r10357, http://codereview.chromium.org/21477) that removes the  registration of URL Protocol.  The original change broke launching of chrome when it's the default browser on Vista from some programs (e.g. Google Desktop). The reason for removing this is that we thought it would be a potential security threat but it seems like this is how other browsers do this and the user gets presented by a warning dialog anyway.
Revert change (r10357, http://codereview.chromium.org/21477) that removes the 
registration of URL Protocol.  The original change broke launching of chrome when
it's the default browser on Vista from some programs (e.g. Google Desktop).
The reason for removing this is that we thought it would be a potential security threat
but it seems like this is how other browsers do this and the user gets presented by
a warning dialog anyway.

BUG=10613

Review URL: http://codereview.chromium.org/67256

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@14052 0039d316-1c4b-4281-b951-d872f2087c98

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