Change core lib, dart2js, and more for new optional parameters syntax

pkg/unittest/test/matchers_test.dart

Index: pkg/unittest/test/matchers_test.dart
===================================================================
--- pkg/unittest/test/matchers_test.dart	(revision 13683)
+++ pkg/unittest/test/matchers_test.dart	(working copy)
@@ -517,9 +517,11 @@
 
   group('Predicate Matchers', () {
     test('isInstanceOf', () {
-      shouldFail(0, predicate((x) => x is String, "an instance of String"),
-        "Expected: an instance of String but: was <0>.");
-      shouldPass('cow', predicate((x) => x is String, "an instance of String"));
+      shouldFail(0, predicate((x) => x is String,
+                              description: "an instance of String"),
+          "Expected: an instance of String but: was <0>.");
+      shouldPass('cow', predicate((x) => x is String,
+                                  description: "an instance of String"));
     });
   });
 }