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

lib/math/random.dart

Index: lib/math/random.dart
diff --git a/lib/math/random.dart b/lib/math/random.dart
index ba0f938c987ae978f6369d32bc5f11f0dcdc1411..d533cf629899bd011bb4cca8f7ac4bb084f53ff5 100644
--- a/lib/math/random.dart
+++ b/lib/math/random.dart
@@ -98,7 +98,7 @@ class _Random implements Random {
   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();