[9] RFR: 8022291: Mac OS: Unexpected JavaLaunchHelper message displaying

[David DeHaven]

JBS:
https://bugs.openjdk.java.net/browse/JDK-8022291

Webrev:
http://cr.openjdk.java.net/~ddehaven/8022291/jdk.0/index.html

This actually turned out to be pretty easy to fix, I eliminated the JavaLaunchHelper class and in place of it stuffed the block it replaced into a NSBlockOperation then changed the performSelectorOnMainThread call to invoke the NSBlockOperation's start message.

I tested against the SWT snippet (Snippet297) that was attached to the original Eclipse bug that triggered the original fix. The SWT tests I could dig up all seemed to work ok.

Original Eclipse bug, used to verify the fix:
https://bugs.eclipse.org/bugs/show_bug.cgi?id=389486


This should be backported to 8u after it bakes in 9 for a bit.

-DrD-