ae5728d67a
Fix bag (string-array, etc) behavior with overlays. 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 final result. Ex: [A,B,C] default with [D] overlay should give [D] but used to give [D,B,C] BUG=1754390 Automated import of CL 144950