code: @SuppressWarnings("deprecation")
    private Counters incrementTaskCountersUnprotected(Counters counters,
                                           TaskInProgress[] tips) {
      for (TaskInProgress tip : tips) {
        counters.incrAllCounters(tip.getCounters());
      }
      return counters;
    }
docs: Increments the counters with the counters from each task.
  @param counters the counters to increment
  @param tips the tasks to add in to counters
  @return counters the same object passed in as counters