Request all response headers be exposed to BufferedResourceLoader since it needs them.
Request all response headers be exposed to BufferedResourceLoader since it needs them.

TEST=http/tests/security/video-cross-origin-readback.html passes even after http/tests/media/resources/serve-video.php is fixed to actually return 206 responses (http://webk.it/89252)

Review URL: https://chromiumcodereview.appspot.com/10554014

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@142821 0039d316-1c4b-4281-b951-d872f2087c98

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