Implement OnTakeFocus - code imported from CefSharp1 branch
Implement OnTakeFocus - code imported from CefSharp1 branch

ruisebastiao/CefSharp,rover886/CefSharp,Livit/CefSharp,gregmartinhtc/CefSharp,zhangjingpu/CefSharp,ITGlobal/CefSharp,zhangjingpu/CefSharp,ruisebastiao/CefSharp,AJDev77/CefSharp,Livit/CefSharp,NumbersInternational/CefSharp,yoder/CefSharp,Haraguroicha/CefSharp,gregmartinhtc/CefSharp,gregmartinhtc/CefSharp,haozhouxu/CefSharp,NumbersInternational/CefSharp,NumbersInternational/CefSharp,twxstar/CefSharp,AJDev77/CefSharp,jamespearce2006/CefSharp,rover886/CefSharp,ITGlobal/CefSharp,illfang/CefSharp,twxstar/CefSharp,wangzheng888520/CefSharp,haozhouxu/CefSharp,twxstar/CefSharp,yoder/CefSharp,windygu/CefSharp,rover886/CefSharp,windygu/CefSharp,VioletLife/CefSharp,Octopus-ITSM/CefSharp,Octopus-ITSM/CefSharp,ruisebastiao/CefSharp,dga711/CefSharp,Livit/CefSharp,rlmcneary2/CefSharp,VioletLife/CefSharp,Octopus-ITSM/CefSharp,dga711/CefSharp,AJDev77/CefSharp,battewr/CefSharp,joshvera/CefSharp,rlmcneary2/CefSharp,rover886/CefSharp,Haraguroicha/CefSharp,jamespearce2006/CefSharp,rlmcneary2/CefSharp,Livit/CefSharp,joshvera/CefSharp,ruisebastiao/CefSharp,windygu/CefSharp,windygu/CefSharp,gregmartinhtc/CefSharp,NumbersInternational/CefSharp,battewr/CefSharp,jamespearce2006/CefSharp,jamespearce2006/CefSharp,wangzheng888520/CefSharp,yoder/CefSharp,rlmcneary2/CefSharp,rover886/CefSharp,VioletLife/CefSharp,battewr/CefSharp,ITGlobal/CefSharp,illfang/CefSharp,zhangjingpu/CefSharp,VioletLife/CefSharp,ITGlobal/CefSharp,illfang/CefSharp,haozhouxu/CefSharp,Haraguroicha/CefSharp,Haraguroicha/CefSharp,battewr/CefSharp,joshvera/CefSharp,haozhouxu/CefSharp,wangzheng888520/CefSharp,joshvera/CefSharp,AJDev77/CefSharp,yoder/CefSharp,dga711/CefSharp,twxstar/CefSharp,Haraguroicha/CefSharp,jamespearce2006/CefSharp,wangzheng888520/CefSharp,Octopus-ITSM/CefSharp,illfang/CefSharp,zhangjingpu/CefSharp,dga711/CefSharp