Pass encoded back/forward tree data from the Web->UI process. Followup from https://bugs.webkit.org/show_bug.cgi?id=51853
Created attachment 77858 [details] Patch v1
Attachment 77858 [details] did not build on qt: Build output: http://queues.webkit.org/results/7249375
Comment on attachment 77858 [details] Patch v1 To avoid breaking the Qt build you should also remove QWKHistoryItem::originalUrl().
r74970