The test is an image failure since r276635: https://results.webkit.org/?suite=layout-tests&test=fast%2Freplaced%2Fpdf-as-embed-with-no-mime-type-is-not-blank.html&platform=GTK&platform=WPE&platform=mac&platform=ios https://build.webkit.org/results/GTK-Linux-64-bit-Release-Tests/r276671%20(1436)/results.html The actual image is a blank image. OTOH, r276635 makes these two tests to pass: fast/attachment/attachment-border-should-stay-inside-attachment.html fast/text/large-synthetic-bold-with-scale-transform.html
Updated expectations in r276687.
<rdar://problem/77537027>
This test has been consistently passing in WebKitGTK and WPE for the last 4000 revisions: fast/replaced/pdf-as-embed-with-no-mime-type-is-not-blank.html There are no tests filed under this bug in TestExpectations. Closing bug.