Don't allocate RenderNamedFlowThread's child list separately.
Created attachment 223922 [details]
Created attachment 223928 [details]
Just reuploading since this depended on something that's landed now.
Comment on attachment 223928 [details]
Clearing flags on attachment: 223928
Committed r163933: <http://trac.webkit.org/changeset/163933>
All reviewed patches have been landed. Closing bug.