[8u40] review request: RT-39000: Exceptions in sandboxed app when dragging text within WebView

[Kevin Rushforth]

Anton (or Leonid),

Please review the following simple fix:

https://javafx-jira.kenai.com/browse/RT-39000
http://cr.openjdk.java.net/~kcr/RT-39000/webrev.00/

Thanks.

-- Kevin