Added new version of reduce.

runtime/lib/array.dart

Index: runtime/lib/array.dart
diff --git a/runtime/lib/array.dart b/runtime/lib/array.dart
index 37efab9c7f4d7d7ebba390d179f0a7049ac21d89..0f10ceb2b541e9a3cbb45015e3080469044183fb 100644
--- a/runtime/lib/array.dart
+++ b/runtime/lib/array.dart
@@ -114,8 +114,8 @@ class _ObjectArray<E> implements List<E> {
     return IterableMixinWorkaround.mapList(this, f);
   }
 
-  reduce(initialValue, combine(previousValue, E element)) {
-    return IterableMixinWorkaround.reduce(this, initialValue, combine);
+  E reduce(E combine(E value, E element)) {
+    return IterableMixinWorkaround.reduce(this, combine);
   }
 
   fold(initialValue, combine(previousValue, E element)) {
@@ -234,10 +234,6 @@ class _ObjectArray<E> implements List<E> {
     throw new StateError("More than one element");
   }
 
-  E min([int compare(E a, E b)]) => IterableMixinWorkaround.min(this, compare);
-
-  E max([int compare(E a, E b)]) => IterableMixinWorkaround.max(this, compare);
-
   List<E> toList({ bool growable: true}) {
     return new List<E>.from(this, growable: growable);
   }
@@ -361,8 +357,8 @@ class _ImmutableArray<E> implements List<E> {
     return IterableMixinWorkaround.joinList(this, separator);
   }
 
-  reduce(initialValue, combine(previousValue, E element)) {
-    return IterableMixinWorkaround.reduce(this, initialValue, combine);
+  E reduce(E combine(E value, E element)) {
+    return IterableMixinWorkaround.reduce(this, combine);
   }
 
   fold(initialValue, combine(previousValue, E element)) {
@@ -486,10 +482,6 @@ class _ImmutableArray<E> implements List<E> {
     throw new StateError("More than one element");
   }
 
-  E min([int compare(E a, E b)]) => IterableMixinWorkaround.min(this, compare);
-
-  E max([int compare(E a, E b)]) => IterableMixinWorkaround.max(this, compare);
-
   List<E> toList({ bool growable: true }) {
     return new List<E>.from(this, growable: growable);
   }