Make the sharding supervisor print what commands in runs in a shard
Make the sharding supervisor print what commands in runs in a shard

e.g. http://build.chromium.org/p/chromium/builders/Linux%20Tests%20x64/builds/24938/steps/browser_tests/logs/stdio lacks some output at the end, and I'd like to know which tests are supposed to be there

BUG=none
TEST=none


Review URL: https://chromiumcodereview.appspot.com/10843027

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@149816 0039d316-1c4b-4281-b951-d872f2087c98

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