[8] Review request for 7124310: [macosx] "opposite" seems always null in focus events

[Leonid Romanov]

Hi,
Please review a fix for 7124310: [macosx] "opposite" seems always null in focus events. It's not a real bug, but something that hasn't been implemented yet: Cocoa focus notifications don't have information about "opposite" window, so we have to track it ourselves.

Webrev: http://cr.openjdk.java.net/~leonidr/7124310/webrev.00/
Bug: http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7124310

Thanks,
Leonid.