Because we added a new file, we rearranged the Unified Build order and now
need to fully qualify BorrowedAttrInfo which previously inherited a using statement.
MozReview-Commit-ID: BD45k5t9dQU
--HG--
extra : transplant_source : o%E5%3B%E2dr%DF%A1cP%5E%17%19%19%FF%E1%27%A3%9F%99