Add WKPageLoadFile SPI variant which returns a navigation object, similarly to WKPageLoadURLRequestReturningNavigation().
<rdar://problem/43899330>
Created attachment 348534 [details] Patch
Comment on attachment 348534 [details] Patch Yuck
Comment on attachment 348534 [details] Patch Clearing flags on attachment: 348534 Committed r235532: <https://trac.webkit.org/changeset/235532>
All reviewed patches have been landed. Closing bug.