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

runtime/bin/timer_impl.dart

Index: runtime/bin/timer_impl.dart
diff --git a/runtime/bin/timer_impl.dart b/runtime/bin/timer_impl.dart
index b55923fc7f1e485825f43bf99bba2f0c2bd9e9a3..41d40be19d2d8d7792fdb8125cb784057e587eea 100644
--- a/runtime/bin/timer_impl.dart
+++ b/runtime/bin/timer_impl.dart
@@ -19,7 +19,7 @@ class _Timer implements Timer {
     Timer timer = new _Timer._internal();
     timer._callback = callback;
     timer._milliSeconds = milliSeconds;
-    timer._wakeupTime = (new Date.now()).value + milliSeconds;
+    timer._wakeupTime = (new Date.now()).millisecondsSinceEpoch + milliSeconds;
     timer._repeating = repeating;
     timer._addTimerToList();
     timer._notifyEventHandler();
@@ -120,7 +120,8 @@ class _Timer implements Timer {
   void _createTimerHandler() {
 
     void _handleTimeout() {
-      int currentTime = (new Date.now()).value + _TIMER_JITTER;
+      int currentTime =
+          (new Date.now()).millisecondsSinceEpoch + _TIMER_JITTER;
 
       // Collect all pending timers.
       DoubleLinkedQueueEntry<_Timer> entry = _timers.firstEntry();