4b4f4a9088
We used to replace elements in the default with elements from the overlay. This change causes us to empty the array first so if the overlay array is smaller we don't end up with elements from the default array showing through at the end of the array. Ex: [A,B,C] and overlay [D] should give [D] but used to give [D,B,C]. BUG=1754390 Automated import of CL 144342