Fix MemoryTest after r134234.
Fix MemoryTest after r134234.

Example failure:
http://build.chromium.org/p/chromium.perf/builders/Vista%20Perf%20%282%29/builds/18273/steps/memory_test/logs/stdio

Seems fine for a test to do IO whenever.

TBR=jam@chromium.org
BUG=None
TEST=out/Release/performance_ui_tests --gtest_filter=GeneralMixMemoryTest.*

Review URL: https://chromiumcodereview.appspot.com/10209024

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@134257 0039d316-1c4b-4281-b951-d872f2087c98

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