Fix DCHECK failure when showing the keyboard overlay.
Fix DCHECK failure when showing the keyboard overlay.

There are cases where mouse events are sent to the childs of KeyboardOverlayView window.
This CL changes the overlay filter to allow such cases.

BUG=143869
TEST=Manual

Review URL: https://chromiumcodereview.appspot.com/10831401

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@152573 0039d316-1c4b-4281-b951-d872f2087c98

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