message: Fix metric names changed after switching to tf.div_no_nan.
diff: @@ -225,7 +225,7 @@ def _safe_div(numerator, denominator, name):
  0 if `denominator` <= 0, else `numerator` / `denominator`
  """
  if compat.forward_compatible(2018, 11, 1):
  - return math_ops.div_no_nan(numerator, denominator)
  + return math_ops.div_no_nan(numerator, denominator, name=name)
  t = math_ops.truediv(numerator, denominator)
  zero = array_ops.zeros_like(t, dtype=denominator.dtype)
  condition = math_ops.greater(denominator, zero)
  