Add WebKitAdditions bits for captive portal mode.
<rdar://85819906>
Created attachment 445288 [details] Patch
Comment on attachment 445288 [details] Patch r=me
Patch 445288 does not build
Created attachment 445334 [details] Patch
Created attachment 445339 [details] Patch
Created attachment 445340 [details] Patch
Created attachment 445341 [details] Patch
Committed r286267 (244630@main): <https://commits.webkit.org/244630@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 445341 [details].