Make isUtc a getter, change some method names in Date.

lib/math/random.dart

 // Copyright (c) 2012, 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.
 
 // A part of the dart:math library.
 
 /**
  * A random number generator. The default implementation supplies a stream of
  * pseudo-random bits which is not suitable for cryptographic purposes.
  */
@@ skipping 80 matching lines @@
   static final _POW2_32 = 1 << 32;
   static final _POW2_53_D = 1.0 * (1 << 53);
 
   static final _A = 0xffffda61;
 
   var _state;
 
   int _nextSeed() {
     if (_prng == null) {
       // TODO(iposva): Use system to get a random seed.
-      _prng = new _Random(new Date.now().value);
+      _prng = new _Random(new Date.now().millisecondsSinceEpoch);
     }
     // Trigger the PRNG once to change the internal state.
     _prng._nextInt32();
     return _prng._state;
   }
 
   static var _prng = null;
 }