Fix top crasher.
Fix top crasher.

Message loop captured in constructor is not the UI loop. Get a UI message loop
proxy in the ExecuteParams constructor and use that instead.

BUG=138087
TEST=none


Review URL: https://chromiumcodereview.appspot.com/10815057

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@147976 0039d316-1c4b-4281-b951-d872f2087c98

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