window.open calls in ChromeFrame cause IE to navigate to a dummy URL which has a prefix like  gcf:attach_external_tab&. When the ExternalTabContainer receives an updated navigation state it passes this off to IE, where we look for the IWebBrowserEventSvc interface to fire navigation events which cause IE to update the address bar, etc. However this interface does not exist on IE6.
window.open calls in ChromeFrame cause IE to navigate to a dummy URL which has a prefix like 
gcf:attach_external_tab&. When the ExternalTabContainer receives an updated navigation state
it passes this off to IE, where we look for the IWebBrowserEventSvc interface to fire navigation events
which cause IE to update the address bar, etc. However this interface does not exist on IE6.

The IDocObjectservice interface is available on IE6 which provides the functionality we need.

This fixes bug http://code.google.com/p/chromium/issues/detail?id=33381

Bug=33381

Review URL: http://codereview.chromium.org/668033

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@40667 0039d316-1c4b-4281-b951-d872f2087c98

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