Revert "Remove deprecated classes and functions in Date."

runtime/lib/date.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.
 // Dart core library.
 
+class TimeZoneImplementation implements TimeZone {
+  const TimeZoneImplementation.utc() : isUtc = true;
+  TimeZoneImplementation.local() : isUtc = false {}
+
+  bool operator ==(Object other) {
+    if (!(other is TimeZoneImplementation)) return false;
+    return isUtc == other.isUtc;
+  }
+
+  final bool isUtc;
+}
+
 // VM implementation of DateImplementation.
 class DateImplementation implements Date {
   static final int _SECONDS_YEAR_2035 = 2051222400;
 
   DateImplementation(int years,
                      [int month = 1,
                       int day = 1,
                       int hours = 0,
                       int minutes = 0,
                       int seconds = 0,
                       int milliseconds = 0,
                       bool isUtc = false])
       : _isUtc = isUtc,
         value = _brokenDownDateToMillisecondsSinceEpoch(
             years, month, day, hours, minutes, seconds, milliseconds, isUtc) {
     if (value === null) throw new IllegalArgumentException();
   }
 
+  DateImplementation.withTimeZone(int years,
+                                  int month,
+                                  int day,
+                                  int hours,
+                                  int minutes,
+                                  int seconds,
+                                  int milliseconds,
+                                  TimeZone timeZone)
+      : this(years, month, day, hours, minutes, seconds, milliseconds,
+             timeZone.isUtc);
+
   DateImplementation.now()
       : _isUtc = true,
         value = _getCurrentMs() {
   }
 
   factory DateImplementation.fromString(String formattedString) {
     // Read in (a subset of) ISO 8601.
     // Examples:
     //    - "2012-02-27 13:27:00"
     //    - "2012-02-27 13:27:00.423z"
@@ skipping 67 matching lines @@
   Date toLocal() {
     if (isUtc()) return new DateImplementation.fromEpoch(value, false);
     return this;
   }
 
   Date toUtc() {
     if (isUtc()) return this;
     return new DateImplementation.fromEpoch(value, true);
   }
 
+  Date changeTimeZone(TimeZone targetTimeZone) {
+    if (targetTimeZone === null) {
+      targetTimeZone = new TimeZoneImplementation.local();
+    }
+    return new Date.fromEpoch(value, targetTimeZone.isUtc);
+  }
+
   String get timeZoneName() {
     if (isUtc()) return "UTC";
     return _timeZoneName(_equivalentSeconds(_secondsSinceEpoch));
   }
 
   Duration get timeZoneOffset() {
     if (isUtc()) return new Duration(0);
     int offsetInSeconds =
         _timeZoneOffsetInSeconds(_equivalentSeconds(_secondsSinceEpoch));
     return new Duration(seconds: offsetInSeconds);
@@ skipping 281 matching lines @@
 
   static int _getHours(int secondsSinceEpoch, bool isUtc)
       native "DateNatives_getHours";
 
   static int _getMinutes(int secondsSinceEpoch, bool isUtc)
       native "DateNatives_getMinutes";
 
   static int _getSeconds(int secondsSinceEpoch, bool isUtc)
       native "DateNatives_getSeconds";
 }