review request for 7124399: [macosx] All Swing drag-n-drop tests faild

[Alexander Zuev]

Hello,

   please review my fix for 7124399: [macosx] All Swing drag-n-drop 
tests faild

   Bug description is here: 
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7124399

   Diffs can be found here: 
http://cr.openjdk.java.net/~kizune/7124399/webrev.00

   The idea of the fix is to accurately tracking component entering and 
leaving and send the corresponding listeners dragRnter/dragExit events.

With best regards,
Alexander Zuev