Manage line-grid RootInlineBox with unique_ptr.
Created attachment 215663 [details] Patch
Created attachment 215675 [details] Patch for landing
Comment on attachment 215675 [details] Patch for landing Clearing flags on attachment: 215675 Committed r158398: <http://trac.webkit.org/changeset/158398>
All reviewed patches have been landed. Closing bug.