RFR (XS): 8258430: 8u backport of JDK-8063107 missing test/javax/swing/JRadioButton/8041561/bug8041561.java changes

[Hohensee, Paul]

Please review this makeup backport.

JBS: https://bugs.openjdk.java.net/browse/JDK-8258430
Webrev: http://cr.openjdk.java.net/~phh/8258430/webrev.8u.01/
JDK-8063107 patch: http://hg.openjdk.java.net/jdk9/jdk9/jdk/rev/4ef86895869c

Applicable portion of original patch:

--- a/test/javax/swing/JRadioButton/8041561/bug8041561.java  Wed Nov 19 16:42:19 2014 +0400
+++ b/test/javax/swing/JRadioButton/8041561/bug8041561.java  Fri Nov 21 16:11:03 2014 +0300
@@ -25,7 +25,6 @@
import java.awt.Color;
import java.awt.Point;
import java.awt.Robot;
-import java.awt.Toolkit;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
@@ -34,7 +33,6 @@
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.plaf.metal.DefaultMetalTheme;
import javax.swing.plaf.metal.MetalLookAndFeel;
-import sun.awt.SunToolkit;
 /**
  * @test
@@ -62,7 +60,7 @@
             }
         });
-        ((SunToolkit) Toolkit.getDefaultToolkit()).realSync();
+        new Robot().waitForIdle();
         Thread.sleep(500);
         SwingUtilities.invokeAndWait(new Runnable() {

Thanks,
Paul