Move parseInt parseDouble to int/double classes as a static method.

lib/coreimpl/date.dart

Index: lib/coreimpl/date.dart
diff --git a/lib/coreimpl/date.dart b/lib/coreimpl/date.dart
index 140803f8634e5035285f8e05e8ba25aaa0749559..4396a8915f9fca3f36b5bf58bc6caac53a49e408 100644
--- a/lib/coreimpl/date.dart
+++ b/lib/coreimpl/date.dart
@@ -24,18 +24,18 @@ class DateImplementation implements Date {
       int parseIntOrZero(String matched) {
         // TODO(floitsch): we should not need to test against the empty string.
         if (matched === null || matched == "") return 0;
-        return parseInt(matched);
+        return int.parse(matched);
       }
 
       double parseDoubleOrZero(String matched) {
         // TODO(floitsch): we should not need to test against the empty string.
         if (matched === null || matched == "") return 0.0;
-        return parseDouble(matched);
+        return double.parse(matched);
       }
 
-      int years = parseInt(match[1]);
-      int month = parseInt(match[2]);
-      int day = parseInt(match[3]);
+      int years = int.parse(match[1]);
+      int month = int.parse(match[2]);
+      int day = int.parse(match[3]);
       int hour = parseIntOrZero(match[4]);
       int minute = parseIntOrZero(match[5]);
       int second = parseIntOrZero(match[6]);