Fix crash on Mac OS X caused by querying audio stream latency. BUG=109959 TEST=none (covered by existing tests and tested locally with built-in audio,  Metric Halo 2882, and Stanton FinalScratch Firewire devices to  verify that crashes are fixed)
Fix crash on Mac OS X caused by querying audio stream latency.
BUG=109959
TEST=none
(covered by existing tests and tested locally with built-in audio,
 Metric Halo 2882, and Stanton FinalScratch Firewire devices to
 verify that crashes are fixed)

Incidentally, the stream latency was always reported as zero on the devices I tested,
so removing this code should have no practical impact.
Review URL: https://chromiumcodereview.appspot.com/9310004

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@120095 0039d316-1c4b-4281-b951-d872f2087c98

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