Don't pass GSS_C_NO_CONTEXT into gss_inquire_context()
Don't pass GSS_C_NO_CONTEXT into gss_inquire_context()

If the call to gss_init_sec_context() failed, the returned context handle could be NULL. Attempting to describe the context by calling gss_inquire_context() using the NULL handle can cause a crash in the Kerberos library.

BUG=73145
TEST=none


Review URL: https://chromiumcodereview.appspot.com/10535018

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@140603 0039d316-1c4b-4281-b951-d872f2087c98

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