Added new version of reduce.

tests/html/streams_test.dart

Index: tests/html/streams_test.dart
diff --git a/tests/html/streams_test.dart b/tests/html/streams_test.dart
index 3d3f16c46962b70a99daff17c268c8e1f21023fd..b0feb5e96bf6111e924861e34b67462430abb527 100644
--- a/tests/html/streams_test.dart
+++ b/tests/html/streams_test.dart
@@ -191,7 +191,7 @@ main() {
   });
 
   test('reduce', () {
-    stream.reduce(null, (a, b) => null).then((_) {});
+    stream.reduce((a, b) => null).then((_) {});
   });
 
   test('fold', () {
@@ -214,14 +214,6 @@ main() {
     stream.length.then((_) {});
   });
 
-  test('min', () {
-    stream.min((a, b) => 0).then((_) {});
-  });
-
-  test('max', () {
-    stream.max((a, b) => 0).then((_) {});
-  });
-
   test('isEmpty', () {
     stream.isEmpty.then((_) {});
   });