Bug 258437 changed how the attachment icon is implemented: Instead of an inner attachment, it is now an image. Unfortunately in that change, the `HTMLAttachmentElement::updateProgress` function was incorrectly changed and does not properly hide the icon anymore. To fix: In https://github.com/WebKit/WebKit/pull/15228/files#diff-81277d6d3423f470d7dc5e5b8f50ab5b7a766baeeb1a640d66b5db0edd617312L305 , the m_innerLegacyAttachment->set/removeInlineStyleProperty lines should be put back, but operating on m_imageElement instead.
<rdar://problem/111720923>
Pull request: https://github.com/WebKit/WebKit/pull/15531
Committed 265785@main (a9b327ab90e2): <https://commits.webkit.org/265785@main> Reviewed commits have been landed. Closing PR #15531 and removing active labels.