HTML <attachment> element introduced in https://trac.webkit.org/changeset/180193 and was enable for Apple Mac only. We should add ENABLE(ATTACHMENT_ELEMENT) to the cmake build system to be able to enable it on other ports later.
Created attachment 250634 [details] Patch
Comment on attachment 250634 [details] Patch LGTM. r=me.
Comment on attachment 250634 [details] Patch Clearing flags on attachment: 250634 Committed r182731: <http://trac.webkit.org/changeset/182731>
All reviewed patches have been landed. Closing bug.