The attributionSourceNonce from the anchor tag should be transferred to the network process and used to initiate token signing from the source server.
<rdar://73581651>
Created attachment 420731 [details] Patch
Created attachment 420781 [details] Patch
Comment on attachment 420781 [details] Patch Fixed content extensions layout test failure (renamed TestRunner function).
Created attachment 420798 [details] Patch
Comment on attachment 420798 [details] Patch Fixed a bad search+replace in the failing layout test send-attribution-conversion-request.html where the URL mistakingly ended with the new signToken.php instead of the correct, pre-existing conversionReport.php.
Created attachment 420799 [details] Patch
Comment on attachment 420799 [details] Patch Rebased to see if I can get it to apply cleanly.
Comment on attachment 420799 [details] Patch Thanks for the review, Chris!
Committed r273088: <https://commits.webkit.org/r273088> All reviewed patches have been landed. Closing bug and clearing flags on attachment 420799 [details].