[9] Review request for 8160160: The menu displayed nothing with the option"-server -d64 -Xmixed -Dswing.defaultlaf=com.sun.java.swing.plaf.gtk.GTKLookAndFeel".

[Semyon Sadetsky]

Hello,

Please review fix for JDK9: https://bugs.openjdk.java.net/browse/JDK-8160160
bug: https://bugs.openjdk.java.net/browse/JDK-8160160

webrev: http://cr.openjdk.java.net/~ssadetsky/8160160/webrev.00/

The menu border is not painted by GTK Adwaita theme and makes popup menu 
invisible at some circumstances.  To resolve this the GTK menu border 
color is compared to the menu background color and if the same the 
border is painted by means of java graphics using a bit different color 
tone.

--Semyon