Add min and max to Iterable and Stream.

sdk/lib/_internal/compiler/implementation/lib/js_array.dart

Index: sdk/lib/_internal/compiler/implementation/lib/js_array.dart
diff --git a/sdk/lib/_internal/compiler/implementation/lib/js_array.dart b/sdk/lib/_internal/compiler/implementation/lib/js_array.dart
index ccb9e0a2d909758020f9c344fc26b4e6047ade24..01ebc02efd470cd9233a2e970325009f1ed5409e 100644
--- a/sdk/lib/_internal/compiler/implementation/lib/js_array.dart
+++ b/sdk/lib/_internal/compiler/implementation/lib/js_array.dart
@@ -142,6 +142,10 @@ class JSArray<E> implements List<E> {
     throw new StateError("More than one element");
   }
 
+  E min([int compare(E a, E b)]) => Collections.min(this, compare);
+
+  E max([int compare(E a, E b)]) => Collections.max(this, compare);
+
   void removeRange(int start, int length) {
     checkGrowable(this, 'removeRange');
     if (length == 0) {