Phase II trial to study the effectiveness of combining trastuzumab with combination chemotherapy in treating patients who have locally recurrent or metastatic urinary tract cancer. Monoclonal antibodies such as trastuzumab can locate tumor cells and either kill them or deliver tumor-killing substances to them without harming normal cells. Drugs used in chemotherapy use different ways to stop tumor cells from dividing so they stop growing or die. Combining monoclonal antibody therapy with combination chemotherapy may kill more tumor cells