def _GetClearedFieldsForFaultAbort(fault_abort, field_prefix):
  """Gets a list of fields cleared by the user for HttpFaultAbort."""
  cleared_fields = []
  if not fault_abort.httpStatus:
    cleared_fields.append(field_prefix + 'httpStatus')
  if not fault_abort.percentage:
    cleared_fields.append(field_prefix + 'percentage')
  return cleared_fields