[net/dns] Add per-address-family histograms AsyncDNS.ResolveSuccess_FAMILY_* and per-qtype histograms AsyncDNS.TransactionSuccess_*.
[net/dns] Add per-address-family histograms AsyncDNS.ResolveSuccess_FAMILY_* and per-qtype histograms AsyncDNS.TransactionSuccess_*.

Currently observed AsyncDNS.ResolveSuccess (duration of DnsTask) is almost twice as long as AsyncDNS.TransactionSuccess (duration of DnsTransaction). This could be attributed to dual-stack resolutions which involve two DnsTransactions, but at the same time the difference between DNS.ResolveSuccess_FAMILY_IPV4 and ..._UNSPEC (duration of ProcTask) is much less pronounced suggesting that SystemDNS resolves names on dual-stack hosts differently than AsyncDNS.

This measurement will allow us to determine how much of the observed overhead of DnsTask over DnsTransaction can be attributed to dual-stack lookups.

BUG=169257

Review URL: https://codereview.chromium.org/11783076

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@176137 0039d316-1c4b-4281-b951-d872f2087c98

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