ceil/floor/truncate/round return integers.

sdk/lib/core/date_time.dart

 // Copyright (c) 2011, 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.
 
 part of dart.core;
 
 /**
  * A DateTime object represents a point in time.
  *
  * It can represent time values that are at a distance of at most
@@ skipping 117 matching lines @@
         return double.parse(matched);
       }
 
       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]);
       bool addOneMillisecond = false;
-      int millisecond = (parseDoubleOrZero(match[7]) * 1000).round().toInt();
+      int millisecond = (parseDoubleOrZero(match[7]) * 1000).round();
       if (millisecond == 1000) {
         addOneMillisecond = true;
         millisecond = 999;
       }
       // TODO(floitsch): we should not need to test against the empty string.
       bool isUtc = (match[8] != null) && (match[8] != "");
       int millisecondsSinceEpoch = _brokenDownDateToMillisecondsSinceEpoch(
           years, month, day, hour, minute, second, millisecond, isUtc);
       if (millisecondsSinceEpoch == null) {
         throw new ArgumentError(formattedString);
@@ skipping 263 matching lines @@
    * Returns the millisecond into the second [0...999].
    */
   external int get millisecond;
 
   /**
    * Returns the week day [MON..SUN]. In accordance with ISO 8601
    * a week starts with Monday which has the value 1.
    */
   external int get weekday;
 }