hg: jdk/client: 5031664: Increase thread safety of EventListenerList

[sergey.bylokhov at oracle.com]

Changeset: fd09f2896e69
Author:    serb
Date:      2017-11-20 14:49 -0800
URL:       http://hg.openjdk.java.net/jdk/client/rev/fd09f2896e69

5031664: Increase thread safety of EventListenerList
Reviewed-by: azvegint

! src/java.desktop/share/classes/javax/swing/event/EventListenerList.java
+ test/jdk/javax/swing/event/EventListenerList/GetUpToDateData.java