RenderStyle currently has a lot of logic for translating before/after/start/end to top/bottom/left/right for paddings, margins, borders and offsets. Move this logic to LengthBox and make paddings/margins/offsets use the same implementation.
Created attachment 142915 [details] Patch
Comment on attachment 142915 [details] Patch Again, same possible perf considerations, but another huge cleanliness win. We'll see!
Comment on attachment 142915 [details] Patch Clearing flags on attachment: 142915 Committed r117832: <http://trac.webkit.org/changeset/117832>
All reviewed patches have been landed. Closing bug.