hg: jdk/client: 8222759: com.sun.java.swing.plaf.gtk.GTKLookAndFeel has unnecessary casts to GTKStyleFactory

[pankaj.b.bansal at oracle.com]

Changeset: 75dd1b241671
Author:    pbansal
Date:      2019-12-23 13:04 +0530
URL:       https://hg.openjdk.java.net/jdk/client/rev/75dd1b241671

8222759: com.sun.java.swing.plaf.gtk.GTKLookAndFeel has unnecessary casts to GTKStyleFactory
Reviewed-by: prr, jdv

! src/java.desktop/share/classes/com/sun/java/swing/plaf/gtk/GTKLookAndFeel.java
+ test/jdk/javax/swing/plaf/gtk/TestCustomStyleFactory.java