This is a direct backport of the fix from the JDK 8 to JDK 7u12
bug: http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7175707
webrev: http://cr.openjdk.java.net/~alexsch/7175707/webrev.01
The nativeGetNSWindowDisplayID_AppKitThread can be invoked both from the
AppKitThread and not from the AppKitThread.
The fix invokes the getNSWindowDisplayID_AppKitThread method on the
AppKitThread in case if we are no on the AppKitThread.
The GetNSWindowDisplayID_AppKitThread method is renamed to
getNSWindowDisplayID_AppKitThread.
Thanks,
Alexandr.
