Simple change to the focus-stealing behaviour of CF in response to WM_NOTIFYPARENT messages.  The hosted CF instance may have spawned a pop-up window.  We do not want that pop-up window to lose focus/or dismiss itself when interacting with the CF instance as a result of the SetFocus(...) call here.  To prevent this problem, we compare the root owner windows of the focus and plugin windows, instead of just testing !IsChild.
Simple change to the focus-stealing behaviour of CF in response to WM_NOTIFYPARENT messages.  The hosted CF instance may have spawned a pop-up window.  We do not want that pop-up window to lose focus/or dismiss itself when interacting with the CF instance as a result of the SetFocus(...) call here.  To prevent this problem, we compare the root owner windows of the focus and plugin windows, instead of just testing !IsChild.

Reviewer note:  The semantics of comparing root owner windows are slightly different from before.  Will this modified test be safe for the purposes of the original test?

BUG=None
TEST=None

Review URL: http://codereview.chromium.org/2063009

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@58749 0039d316-1c4b-4281-b951-d872f2087c98

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