Summary: Fixes issue brought up in https://github.com/facebook/react-native/issues/10603 The gist of the problem is that in css it is fine for a child to overflow a parent if it feels the need to, we were not respecting this. Reviewed By: gkassabli Differential Revision: D4157971 fbshipit-source-id: 3cfae15ac8b65b70f01789444099ee684e1b099a