You should be able to use animations and transitions on the shape-outside property if its value is a basic shape
Created attachment 213395 [details] Initial patch
Comment on attachment 213395 [details] Initial patch r=me
Comment on attachment 213395 [details] Initial patch Clearing flags on attachment: 213395 Committed r156916: <http://trac.webkit.org/changeset/156916>
All reviewed patches have been landed. Closing bug.