Summary: we had special handling previously for nested scrollview and we previously used the indirect approach of asking for the local visible rect. New approach is to get the scroll x from the parent and apply it, will work for all scrolling view and it is a lot clearer what the intention is.
Reviewed By: lblasa
Differential Revision: D41772106
fbshipit-source-id: 04b5e68ecabd70548e788ed18423a360ce6c3fa7
c238740af1