test/java/awt/Component/SetEnabledPerformance/SetEnabledPerformance.java

rev 14031 : 8160974: [TESTBUG] Mark more headful tests with @key headful.

This is a backport of fe58d505fffd from jdk9. 228/596 hunks apply without
modifications. 16 hunks required manual rework. The remainder were for files
not present in jdk8u.

@@ -29,10 +29,11 @@
 import javax.swing.JButton;
 import javax.swing.SwingUtilities;
 
 /**
  * @test
+ * @key headful
  * @bug 8071306
  * @author Sergey Bylokhov
  */
 public final class SetEnabledPerformance {