Replace the inner legacy attachment with a standard `<img>` element. <rdar://105252742>
Pull request: https://github.com/WebKit/WebKit/pull/15228
Committed 265615@main (b0e7ef7b0420): <https://commits.webkit.org/265615@main> Reviewed commits have been landed. Closing PR #15228 and removing active labels.
Re-opening for pull request https://github.com/WebKit/WebKit/pull/15421
Committed 265629@main (61d2643b6fe6): <https://commits.webkit.org/265629@main> Reviewed commits have been landed. Closing PR #15421 and removing active labels.
Looks like this flakily regressed fast/attachment/cocoa/wide-attachment-folder-icon.html
https://results.webkit.org/?suite=layout-tests&test=fast%2Fattachment%2Fcocoa%2Fwide-attachment-folder-icon.html
Thank you Jonathan. I believe it may have made a few wide-attachment-* tests flaky, because of the way the icon is asynchronously fetched and then loaded into an img. I'm working on bug 258865, which should solve this.