cellAbove(), cellBelow() check the logical rather than the physical direction. This isn't what's needed in paintCollapsedBorders()
Created attachment 209207 [details] Patch
Comment on attachment 209207 [details] Patch This patch looks good, but it does highlight the fact that we need to rename cellBefore/After/Above/Below, since they aren't truly physical. I think we should rename them to: previousCellInRow, nextCellInRow, cellInPreviousRow, cellInNextRow I think that would be more clear than above/below/before/after, especially with how before/after is overloaded to mean "above/below" in writing modes. :)
Comment on attachment 209207 [details] Patch Clearing flags on attachment: 209207 Committed r154389: <http://trac.webkit.org/changeset/154389>
All reviewed patches have been landed. Closing bug.