@Override
  public void incrementSnapshotObserverChoreTime(long time) {
    snapshotObserverTimeHisto.add(time);
  }
Implementation of {@link MetricsMasterQuotaSource} which writes the values passed in via the
interface to the metrics backend.
hbase-hadoop-compat/src/main/java/org/apache/hadoop/hbase/master/MetricsMasterQuotaSourceImpl.java