Summary:
In D2980358, alignment was implemented for nodes. This unfortunately
introduced a bug, which is that when we have a BoringLayout that is set to
ALIGN_CENTER, it can't be seen. This is a result of the fact that the width
passed in to BoringLayout is Integer.MAX_VALUE. Since measure has already
been called at this point, we can just pass the layout's width as the width
of the BoringLayout.
Reviewed By: sriramramani
Differential Revision: D3004971