Review request for MACOSX_PORT-784: Program freeze when Swing is used with -XstartOnFirstThread

[Dmitry Cherepanov]

Hello,

Please review a fix for http://java.net/jira/browse/MACOSX_PORT-784 at

http://cr.openjdk.java.net/~dcherepanov/7128597/webrev.0/

To avoid the deadlock, the fix includes:

 - the addition of +[NSThread isMainThread] to ensure that we don't call 
-performSelectorOnMainThread: when the current thread is the AppKit thread
 - also, the fix doesn't invoke the getCGLConfigInfo method on the queue 
flusher thread - after the fix, the getCGLConfigInfo method is executed 
on the current thread directly.

Thanks,
Dmitry