Fix scheduled_test after corelib broke it.

pkg/scheduled_test/test/scheduled_test_test.dart

Index: pkg/scheduled_test/test/scheduled_test_test.dart
diff --git a/pkg/scheduled_test/test/scheduled_test_test.dart b/pkg/scheduled_test/test/scheduled_test_test.dart
index f07024da23168039f24ef18c40c496926ccdfdb6..79d2e37d0266d24e315e07274cba4fdd209bbcad 100644
--- a/pkg/scheduled_test/test/scheduled_test_test.dart
+++ b/pkg/scheduled_test/test/scheduled_test_test.dart
@@ -877,7 +877,7 @@ void main() {
     test('test 2', () {
       expect(errors, everyElement(new isInstanceOf<ScheduleError>()));
       expect(errors.map((e) => e.error), equals(["The schedule timed out after "
-        "0:00:00.001 of inactivity."]));
+        "0:00:00.001000 of inactivity."]));
     });
   }, passing: ['test 2']);
 
@@ -898,7 +898,7 @@ void main() {
     test('test 2', () {
       expect(errors, everyElement(new isInstanceOf<ScheduleError>()));
       expect(errors.map((e) => e.error), equals(["The schedule timed out after "
-        "0:00:00.001 of inactivity."]));
+        "0:00:00.001000 of inactivity."]));
     });
   }, passing: ['test 2']);
 
@@ -943,7 +943,7 @@ void main() {
     test('test 2', () {
       expect(errors, everyElement(new isInstanceOf<ScheduleError>()));
       expect(errors.map((e) => e.error), equals([
-        "The schedule timed out after 0:00:00.003 of inactivity.",
+        "The schedule timed out after 0:00:00.003000 of inactivity.",
         "out-of-band"
       ]));
     });
@@ -998,7 +998,7 @@ void main() {
       expect(errors, everyElement(new isInstanceOf<ScheduleError>()));
       expect(errors.map((e) => e.error), equals([
         "out-of-band",
-        "The schedule timed out after 0:00:00.002 of inactivity."
+        "The schedule timed out after 0:00:00.002000 of inactivity."
       ]));
     });
   }, passing: ['test 2']);