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

pkg/unittest/test/matchers_test.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #library('matcherTest');
 #import('../../../pkg/unittest/unittest.dart');
 #source('test_utils.dart');
 
 doesNotThrow() {}
 doesThrow() { throw 'X'; }
@@ skipping 499 matching lines @@
     test('allOf', () {
       shouldPass(1, allOf([lessThan(10), greaterThan(0)]));
       shouldFail(-1, allOf([lessThan(10), greaterThan(0)]),
           "Expected: (a value less than <10> and a value greater than <0>) "
           "but: a value greater than <0> was <-1>.");
     });
   });
 
   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"));
     });
   });
 }