[9] Review request for 8153049 : Merge "Frame and Page lifetime fixes in WebCore::createwindows" and "FrameLoader::checkCompleted can hit the "ref'ing while destroyed" assertion"

[Guru Hb]

Hi Alexander, Arunprasad & Kevin,

JBS : https://bugs.openjdk.java.net/browse/JDK-8153049
Webrev : http://cr.openjdk.java.net/~ghb/8153049/webrev.00/

Merging webkit change set, Root cause and description are updated in JBS.

Thanks,
Guru