test/java/awt/Window/WindowGCInFullScreen/WindowGCInFullScreen.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.

*** 30,39 ****
--- 30,40 ----
  
  import javax.swing.SwingUtilities;
  
  /**
   * @test
+  * @key headful
   * @bug 8019591
   * @author Sergey Bylokhov
   */
  public class WindowGCInFullScreen {