Size of the replaced elements cannot be specified using viewport-percentage length units like vw, vh and vmin.
Created attachment 136134 [details] ProposedPatch
Comment on attachment 136134 [details] ProposedPatch r=me
Comment on attachment 136134 [details] ProposedPatch Clearing flags on attachment: 136134 Committed r114208: <http://trac.webkit.org/changeset/114208>
All reviewed patches have been landed. Closing bug.