8300205: Swing test bug8078268 make latch timeout configurable

Backport-of: e82dc6935b5f575a53fcba9c96767cee1b535cb8

test/jdk/javax/swing/text/html/parser/Parser/8078268/bug8078268.java

@@ -1,5 +1,5 @@
 /*
-* Copyright (c) 2016, 2022, Oracle and/or its affiliates. All rights reserved.
+* Copyright (c) 2016, 2023, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
@@ -38,7 +38,8 @@
    @run main bug8078268
 */
 public class bug8078268 {
-    private static final long TIMEOUT = 10_000;
+    private static final float tf = Float.parseFloat(System.getProperty("test.timeout.factor", "1.0"));
+    private static final long TIMEOUT = 10_000 * (long)tf;
 
     private static final String FILENAME = "slowparse.html";
 
@@ -61,7 +62,7 @@ public void run() {
         });
 
         if (!latch.await(TIMEOUT, MILLISECONDS)) {
-            throw new RuntimeException("Parsing takes too long.");
+            throw new RuntimeException("Parsing takes too long. Current timeout is " + TIMEOUT);
         }
         if (exception != null) {
             throw exception;