We need to delete the line box tree to stop the crashes.
Created attachment 229998 [details]
Comment on attachment 229998 [details]
View in context: https://bugs.webkit.org/attachment.cgi?id=229998&action=review
> + This is imported from a patch Morten did for Blink, but I had to change it a fair
We typically link to the Blink commit id.
Landed in r167718.