Rename mappedBy to map.

pkg/intl/test/date_time_format_test_core.dart

Index: pkg/intl/test/date_time_format_test_core.dart
diff --git a/pkg/intl/test/date_time_format_test_core.dart b/pkg/intl/test/date_time_format_test_core.dart
index 94f9bcf30af8af7264d7575b19ef15995966b734..fce9e6e9b73f6561bc2e595963349ee0d500d9f3 100644
--- a/pkg/intl/test/date_time_format_test_core.dart
+++ b/pkg/intl/test/date_time_format_test_core.dart
@@ -218,12 +218,12 @@ runDateTests([List<String> subset]) {
     var date_format = new DateFormat("d");
     expect(
         date_format.parsePattern("hh:mm:ss")
-            .mappedBy((x) => x.pattern)
+            .map((x) => x.pattern)
             .toList(),
         orderedEquals(["hh",":", "mm",":","ss"]));
     expect(
         date_format.parsePattern("hh:mm:ss")
-            .mappedBy((x) => x.pattern)
+            .map((x) => x.pattern)
             .toList(),
         orderedEquals(["hh",":", "mm",":","ss"]));
   });