The attached test has this: -webkit-shape-margin: calc(25%*3 - 10in); getPropertyValue() on the computedStyle returns null. Simpler calc values are fine - for this one, remove the "- 10in" and the test passes.
Created attachment 230340 [details] test case for the bug
Created attachment 230359 [details] Patch
Comment on attachment 230359 [details] Patch r=me
Comment on attachment 230359 [details] Patch Clearing flags on attachment: 230359 Committed r167935: <http://trac.webkit.org/changeset/167935>
All reviewed patches have been landed. Closing bug.