RFR 8213806: WebView - JVM crashes for given HTML

[Arunprasad Rajkumar]

Hi,

Please review the following PR which fixes JDK-8213806.

https://github.com/javafxports/openjdk-jfx/pull/355

https://bugs.openjdk.java.net/browse/JDK-8213806

Thanks,
Arun