8294809: ListenerHelper for managing and disconnecting listeners

modules/javafx.controls/src/main/java/com/sun/javafx/scene/control/ListenerHelper.java

@@ -111,7 +111,7 @@ public void disconnect() {
         }
     }
 
-    protected boolean isAliveOrDisconnect() {
+    private boolean isAliveOrDisconnect() {
         if (ownerRef != null) {
             if (ownerRef.get() == null) {
                 disconnect();

modules/javafx.controls/src/test/java/test/javafx/scene/control/TestListenerHelper.java

@@ -280,7 +280,7 @@ public void testInvalidationListener_Callback() {
         SimpleStringProperty p = new SimpleStringProperty();
         AtomicInteger ct = new AtomicInteger();
 
-        h.addInvalidationListener(p, (cur) -> ct.incrementAndGet());
+        h.addInvalidationListener(() -> ct.incrementAndGet(), p);
 
         p.set("1");
         assertEquals(1, ct.get());
@@ -297,7 +297,7 @@ public void testInvalidationListener_Callback_FireImmediately() {
         SimpleStringProperty p = new SimpleStringProperty();
         AtomicInteger ct = new AtomicInteger();
 
-        h.addInvalidationListener(p, true, (cur) -> ct.incrementAndGet());
+        h.addInvalidationListener(() -> ct.incrementAndGet(), true, p);
 
         p.set("1");
         assertEquals(2, ct.get());