<AWT Dev> <Awt Dev> [9] Review Request for 8041519: JVM crash on second DnD after modal dialog opened during Swing DnD operation

[Semyon Sadetsky]

Hello,

Please review fix for JDK9:
bug: https://bugs.openjdk.java.net/browse/JDK-8041519
webrev: http://cr.openjdk.java.net/~ssadetsky/8041519/webrev.00/

This is regression from JDK-6342381. When a modal dialog blocks drop 
operation in progress state consequent mouse events clear the drop 
context variables (this clearing was introduced by JDK-6342381). The 
solution is to avoid clearing if drop operation is in progress.
Test scenario for this case would be too hard and unstable. Since the 
fix is pretty simple I left it as noreg.

--Semyon