[8u] review request: RT-36141: Gtk: SecurityException using WebView when running app with security manager

[Kevin Rushforth]

Anthony,

Please review the following fix for a regression introduced in FX 8 that 
prevents untrusted applications from running WebView on Linux.

JIRA:  https://javafx-jira.kenai.com/browse/RT-36141
Webrev:  http://cr.openjdk.java.net/~kcr/RT-36141/

Thanks.

-- Kevin