6800572: Removing elements from views of NavigableMap implementations does not always work correctly. Summary: Replace use of new TreeSet with new KeySet Reviewed-by: martin
Reviewed-by: dl, chegar, alanb Contributed-by: scottb@google.com
6691185: (coll) TreeMap.navigableKeySet's descendingIterator method starts at first instead of last entry Reviewed-by: dl, chegar
