aura: Make tests pass Desktop's dispatcher to message loop.
aura: Make tests pass Desktop's dispatcher to message loop.

Pass the Desktop's MessageLoop::Dispatcher to
MessageLoopForUI::RunAllPendingWithDispatcher() instead of
just calling RunAllPending() without a dispatcher.

Otherwise, we frequently get stuck forever in
MessagePumpX::RunOnce().  g_main_context_iteration() appears
to return true (indicating that it performed work)
indefinitely there for reasons that are unclear to me.

BUG=100671
TEST=ran aura_unittests successfully locally in conjunction with a change that was previously hanging consistently

Review URL: http://codereview.chromium.org/8346023

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@106301 0039d316-1c4b-4281-b951-d872f2087c98

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