In the case that multiple rules are inherited, if at least one of these rules has no match to the filtered text, the header is hidden, even if other rules do have a match.
Created attachment 328559 [details] Patch
Created attachment 328600 [details] Patch Rebase
Comment on attachment 328600 [details] Patch Clearing flags on attachment: 328600 Committed r225600: <https://trac.webkit.org/changeset/225600>
All reviewed patches have been landed. Closing bug.
<rdar://problem/35895756>