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

samples/third_party/dromaeo/tests/RunnerSuite.dart

 typedef void Test();
 typedef void Operation();
 typedef void Reporter(Map<String, Result> results);
 
 class Suite {
   /**
    * Ctor.
    *  [:_window:] The window of the suite.
    *  [:_name:] The name of the suite.
    */
@@ skipping 42 matching lines @@
       // List of number of runs in seconds.
       List<double> runsPerSecond = new List<double>();
 
       // Run the test several times.
       try {
         // TODO(antonm): use .setTimeout to schedule next run as JS
         // version does.  That allows to report the intermidiate results
         // more smoothly as well.
         for (int i = 0; i < _N_RUNS; i++) {
           int runs = 0;
-          final int start = new Date.now().value;
+          final int start = new Date.now().millisecondsSinceEpoch;
 
-          int cur = new Date.now().value;
+          int cur = new Date.now().millisecondsSinceEpoch;
           while ((cur - start) < 1000) {
             test_();
-            cur = new Date.now().value;
+            cur = new Date.now().millisecondsSinceEpoch;
             runs++;
           }
 
           runsPerSecond.add((runs * 1000.0) / (cur - start));
         }
       } catch(var exception, var stacktrace) {
         _window.alert('Exception ${exception}: ${stacktrace}');
         return;
       }
       _reportTestResults(name, new Result(runsPerSecond));
@@ skipping 48 matching lines @@
 
   List<Operation> _operations;
   int _nTests;
   int _nRanTests;
 
   Suite _addOperation(Operation operation) {
     _operations.add(operation);
     return this;
   }
 }