We would like to assert ShadowRoot type (UserAgentShadowRoot or AuthorShadowRoot).
Created attachment 151590 [details] Patch
Created attachment 151595 [details] Patch
Comment on attachment 151595 [details] Patch Looks good.
Comment on attachment 151595 [details] Patch Clearing flags on attachment: 151595 Committed r122298: <http://trac.webkit.org/changeset/122298>
All reviewed patches have been landed. Closing bug.