Make corelib_strong tests strong-mode compliant

tests/corelib_strong/sort_test.dart

Index: tests/corelib_strong/sort_test.dart
diff --git a/tests/corelib_strong/sort_test.dart b/tests/corelib_strong/sort_test.dart
index 9327363c00f6c3ba6745767915cfa76a657b4954..99a0c71d1389e59026746e5a4c1858916f27b5f5 100644
--- a/tests/corelib_strong/sort_test.dart
+++ b/tests/corelib_strong/sort_test.dart
@@ -7,8 +7,10 @@ library sort_test;
 import "package:expect/expect.dart";
 import 'sort_helper.dart';
 
+typedef int intPairToInt(int a, int b);
+
 main() {
-  var compare = (a, b) => a.compareTo(b);
+  intPairToInt compare = (a, b) => a.compareTo(b);

[Leaf, 2017/02/08 02:03:49]

I think you could just write this as

var compare = (int a, int b) => a.compareTo(b)

if preferred.  Either way is fine.

   var sort = (list) => list.sort(compare);
   new SortHelper(sort, compare).run();