Add min and max to Iterable and Stream.

runtime/lib/growable_array.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 class _GrowableObjectArray<T> implements List<T> {
   factory _GrowableObjectArray._uninstantiable() {
     throw new UnsupportedError(
         "GrowableObjectArray can only be allocated by the VM");
   }
 
@@ skipping 143 matching lines @@
     if (length > 0) return this[length - 1];
     throw new StateError("No elements");
   }
 
   T get single {
     if (length == 1) return this[0];
     if (length == 0) throw new StateError("No elements");
     throw new StateError("More than one element");
   }
 
+  int min([int compare(int a, int b)]) => Collections.min(this, compare);
+
+  int max([int compare(int a, int b)]) => Collections.max(this, compare);
+
   int indexOf(T element, [int start = 0]) {
     return Arrays.indexOf(this, element, start, length);
   }
 
   int lastIndexOf(T element, [int start = null]) {
     if (start == null) start = length - 1;
     return Arrays.lastIndexOf(this, element, start);
   }
 
   void _grow(int new_length) {
@@ skipping 110 matching lines @@
   }
 
   List<T> toList() {
     return new List<T>.from(this);
   }
 
   Set<T> toSet() {
     return new Set<T>.from(this);
   }
 }