Revert change in r31143 which caused crash signal msg size to change and subsequent read to fail.
Revert change in r31143 which caused crash signal msg size to change and subsequent read to fail.

This was causing MetricsServiceTest.CrashRenderers to fail on Linux branded builds with CHROME_HEADLESS set:
http://build.chromium.org/buildbot/waterfall.fyi/builders/Google%20Chrome%20Linux/builds/4723/steps/ui_tests/logs/CrashRenderers

Review URL: http://codereview.chromium.org/414010


git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@32575 0039d316-1c4b-4281-b951-d872f2087c98

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