Clients may want to start a download as if it were originated in an existing web view. This will allow the download to use the same session.
<rdar://problem/46363706>
Created attachment 356123 [details] Patch
Created attachment 356124 [details] Patch v2 Decided to rename the new parameter from 'initiatingWebView' to 'originatingWebView' to match the terminology of _WKDownload.originatingWebView.
Comment on attachment 356124 [details] Patch v2 Clearing flags on attachment: 356124 Committed r238742: <https://trac.webkit.org/changeset/238742>
All reviewed patches have been landed. Closing bug.