<AWT Dev> [9] Review request for 8071668: [macosx] Clipboard does not work with 3rd parties Clipboard Managers

[Anton Nashatyrev]

Hello,
     could you please review the following fix:

fix: http://cr.openjdk.java.net/~anashaty/8071668/9/webrev.00/ 
<http://cr.openjdk.java.net/%7Eanashaty/8071668/9/webrev.00/>
bug: https://bugs.openjdk.java.net/browse/JDK-8071668

     Problem: On Mac Java doesn't see external clipboard changes.
     Fix: since there is still no Cocoa pasteboard changes notification 
mechanism, check the Cocoa clipboard counter each time the contents is 
requested from the Java Clipboard.

Thanks!
Anton.