Revert 130528 - Disable one-click signin for all platforms except windows.
Revert 130528 - Disable one-click signin for all platforms except windows.

BUG=121677
TEST=Make sure one-click signin is working only on windows. See crbug.com/110050
for a description of the feature

Review URL: https://chromiumcodereview.appspot.com/9969102

TBR=rogerta@chromium.org
Review URL: https://chromiumcodereview.appspot.com/9981002

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@130623 0039d316-1c4b-4281-b951-d872f2087c98

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