Fix for the DoNotOverrideReferrer url request test failures observed on the chrome frame IE6 builder. This test has two steps, the first one which sets a valid referrer in the outgoing request and validates it. The next step is to set the referrer in the extra request headers and verify that it is not honored.
Fix for the DoNotOverrideReferrer url request test failures observed on the chrome frame IE6 builder.
This test has two steps, the first one which sets a valid referrer in the outgoing request and validates
it. The next step is to set the referrer in the extra request headers and verify that it is not honored.

On IE6 as the URL's are the same the request headers appear to be cached, inspite of the no-cache response
coming back from the web server. To work around this we set the LOAD_VALIDATE_CACHE flag on the second request
which acts like a normal reload operation i.e. an if-none-match/if-modified-since query

Fixes bug http://code.google.com/p/chromium/issues/detail?id=87591

BUG=87591
Review URL: http://codereview.chromium.org/7277016

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@90790 0039d316-1c4b-4281-b951-d872f2087c98

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