Add min and max to Iterable and Stream.

sdk/lib/html/templates/immutable_list_mixin.darttemplate

   // -- start List<$E> mixins.
   // $E is the element type.
 
   // From Iterable<$E>:
 
   Iterator<$E> get iterator {
     // Note: NodeLists are not fixed size. And most probably length shouldn't
     // be cached in both iterator _and_ forEach method. For now caching it
     // for consistency.
     return new FixedSizeListIterator<$E>(this);
@@ skipping 105 matching lines @@
     if (this.length > 0) return this[this.length - 1];
     throw new StateError("No elements");
   }
 
   $E get single {
     if (length == 1) return this[0];
     if (length == 0) throw new StateError("No elements");
     throw new StateError("More than one element");
   }
 
+  $E min([int compare($E a, $E b)]) => _Collections.minInList(this, compare);
+
+  $E max([int compare($E a, $E b)]) => _Collections.maxInList(this, compare);
+
   $E removeAt(int pos) {
     throw new UnsupportedError("Cannot removeAt on immutable List.");
   }
 
   $E removeLast() {
     throw new UnsupportedError("Cannot removeLast on immutable List.");
   }
 
   void setRange(int start, int rangeLength, List<$E> from, [int startFrom]) {
     throw new UnsupportedError("Cannot setRange on immutable List.");
   }
 
   void removeRange(int start, int rangeLength) {
     throw new UnsupportedError("Cannot removeRange on immutable List.");
   }
 
   void insertRange(int start, int rangeLength, [$E initialValue]) {
     throw new UnsupportedError("Cannot insertRange on immutable List.");
   }
 
   List<$E> getRange(int start, int rangeLength) =>
       Lists.getRange(this, start, rangeLength, <$E>[]);
 
   // -- end List<$E> mixins.