[8u60, 9] Review request for RT-40743: [WebView] IllegalArgumentException when dragging in google maps

[Anton Nashatyrev]

Hi Anton, All

can you please review the fix:
https://javafx-jira.kenai.com/browse/RT-40743
http://cr.openjdk.java.net/~anashaty/RT-40743/webrev.00/ 
<http://cr.openjdk.java.net/%7Eanashaty/RT-40743/webrev.00/>

Thanks!
Anton.