mozilla/servo — pull request #1578 by pradeep90 (2014-01-28 04:20:27+00:00)
Title: Remove unnecessary ClipDisplayItems in box_.rs

For ScannedTextBox and ImageBox, the ClipDisplayItem's child_list is
currently always empty.

ClipDisplayItem is used to implement overflow hidden and should only be
created for block containers, as per
http://www.w3.org/TR/CSS2/visufx.html#propdef-overflow