[9] review request: RT-46160 [WebView] "outstanding resource locks detected" when using clip in canvas

[Anton Tarasov]

Hi Kevin, Vadim,

Please review the fix:

JIRA: https://javafx-jira.kenai.com/browse/RT-46160
webrev: http://cr.openjdk.java.net/~ant/RT-46160/webrev.0

Thanks,
Anton.