SVG Pattern doesn't take the viewBox of a referenced Pattern (referenced by xlink:href) The problem can be seen in the link above.
Created attachment 79586 [details] Patch
Comment on attachment 79586 [details] Patch LGTM.
Comment on attachment 79586 [details] Patch Clearing flags on attachment: 79586 Committed r76236: <http://trac.webkit.org/changeset/76236>
All reviewed patches have been landed. Closing bug.