Summary:
Noticed a regression in sticky scrolling not being sticky. I suspect this is caused by pixel inaccuracy + rounding, but our offset from bottom calculation consistently now reports `1` when being at the end of the scrollable region.
Too bad it is really hard to protect against these kind of regressions automated.
Reviewed By: passy
Differential Revision: D28095803
fbshipit-source-id: 1dbd57d84fb308023c2300c543aca344bf27ec28
1a8943e903