[webkit] [9] 8180825: Javafx WebView fails to render pdf.js

[Arunprasad Rajkumar]

Kevin, Guru, Murali,

Please review the following fix targeted for JDK-9.

JBS: https://bugs.openjdk.java.net/browse/JDK-8180825
Webrev: http://cr.openjdk.java.net/~arajkumar/8180825/webrev

Regards,
Arun