[7u6] Please review my fix for 7177144: [macosx] Drag and drop not working (regression in 7u6)

[Alexander Zuev]

Hello,

   please review my fix 7177144: [macosx] Drag and drop not working 
(regression in 7u6)
   CR description can be found here: 
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7177144

   Webrev with the proposed change can be seen here: 
http://cr.openjdk.java.net/~kizune/7177144/webrev.00

   This fix affects all platforms but due to the fix nature it shouldn't 
cause any regressions. The idea of the fix is to prevent Drag and Drop 
events from coalescing because it may cause hangup due to the 
synchronous nature of this type of events.

With best regards,
Alex