$scope.chartObject.data = {
        "cols": cols,
        "rows": [{ "c": [{ "v": "Date(2017, 1, 22, 3, 25, 0, 0)" }, { "v": 1.429, "f": "1.429Secs" }] }]
    }

$scope.chartObject.data = {
        "cols": cols,
        "rows": rows//Not this version JSON.stringify(rows)
    }