[9] Review request for 8178905: Undercorated frame is not painted on OEL7(Gnome3).

[Semyon Sadetsky]

Hello,

Please review fix for JDK9:
bug: https://bugs.openjdk.java.net/browse/JDK-8178905

webrev: http://cr.openjdk.java.net/~ssadetsky/8178905/webrev.00/

When an undecorated window is initialized Gnome3 WM does not send the 
ConfigureNotify event which is must in the Linux AWT implementation to 
establish the correct frame content size.

The suggested fix introduces a check for the frame content was 
initialized upon the Expose notification and updates the content bounds 
if necessary.

--Semyon