Tanger Outlets in Cookstown, Ontario has a nursing mothers station. This nursing room is located in the washroom. It's not easy to find and most mall employees are clueless about it's location according to moms who frequent the mall.
There are also other stores in this outlet mall with their own nursing rooms listed on Moms Pump Here, such as OshKosh.
Note: Nursing in a public place (restaurant, mall, etc) is protected under the Ontario Human Rights Code. Moms can openly breastfeed without fear of harassment if they so choose