[7u6] Please review my fix for 7171163: [macosx] Shortcomings in the design of the secondary native event loop made JavaFX DnD deadlock

[Alexander Zuev]

Hello,

   please review my fix for the
7171163: [macosx] Shortcomings in the design of the secondary native 
event loop made JavaFX DnD deadlock

   Bug can be found at 
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7171163

   Webrev can be found at: 
http://cr.openjdk.java.net/~kizune/7171163/webrev.00/

With best regards,
Alexander Zuev