Mac: Call makeFirstResponder:nil from windowDidResignKey: in cefclient to remove focus from the browser view when the window becomes inactive (issue #565).
Mac: Call makeFirstResponder:nil from windowDidResignKey: in cefclient to remove focus from the browser view when the window becomes inactive (issue #565).

git-svn-id: 1ef869bbaae1395f58ce7cb8bda92ccef9042057@1025 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

svn2github/cef,svn2github/cef,svn2github/cef,svn2github/cef1,svn2github/cef1,svn2github/cef1,svn2github/cef,svn2github/cef1