The CSS3 Box Alignment specification (http://dev.w3.org/csswg/css-align-3) defines new values for the align-{self, items} CSS properties. Currently, the RenderFlexibleBox render does not support the following ones: - start - end - self-stat - self-end - left - right - last-baseline (at risk of being dropped during the CR period)
*** Bug 151591 has been marked as a duplicate of this bug. ***
<rdar://problem/29695086>