Pass: parent -webkit-column-count = 2
Pass: parent -webkit-column-width = 64px
Pass: child0 -webkit-column-count = 2
Pass: child0 -webkit-column-width = 64px
Pass: child1 -webkit-column-count = 2
Pass: child1 -webkit-column-width = auto
Pass: child2 -webkit-column-count = auto
Pass: child2 -webkit-column-width = 64px