Get rid of check that caused redirects to fail extension updates.
Get rid of check that caused redirects to fail extension updates.

When the extension autoupdater downloads .crx files, we rely on the UrlFetcher 
class to do it for us. Inside OnCrxFetchComplete I had put a sanity check that 
the url we finished with was the same one we started with, but of course this 
breaks the case of redirects and wasn't needed because the API of UrlFetcher is
that there's one UrlFetcher per outstanding fetch.

BUG=26177
TEST=Extension Autoupdate should keep working normally, and work with redirects
such as the example mentioned in the bug.


Review URL: http://codereview.chromium.org/549215

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@37718 0039d316-1c4b-4281-b951-d872f2087c98

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