test/javax/swing/plaf/synth/SynthButtonUI/6276188/bug6276188.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.

*** 20,29 ****
--- 20,30 ----
   * or visit www.oracle.com if you need additional information or have any
   * questions.
   */
  /**
   * @test 1.4 08/08/05
+  * @key headful
   * @bug 6276188
   * @library ../../../../regtesthelpers
   * @build Util
   * @author Romain Guy
   * @summary Tests PRESSED and MOUSE_OVER and FOCUSED state for buttons with Synth.