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.

*** 29,38 ****
--- 29,39 ----
  import javax.swing.JButton;
  import javax.swing.SwingUtilities;
  
  /**
   * @test
+  * @key headful
   * @bug 8071306
   * @author Sergey Bylokhov
   */
  public final class SetEnabledPerformance {