Rename Date to DateTime.

tests/isolate/timer_test.dart

Index: tests/isolate/timer_test.dart
diff --git a/tests/isolate/timer_test.dart b/tests/isolate/timer_test.dart
index 86f6753e92d840b951ffacc28c4bd37a1cd1fc71..aafa23de463b3ae142a16cf1527ffefb4b70c847 100644
--- a/tests/isolate/timer_test.dart
+++ b/tests/isolate/timer_test.dart
@@ -16,12 +16,12 @@ int timeout;
 int iteration;
 
 void timeoutHandler(Timer timer) {
-  int endTime = (new Date.now()).millisecondsSinceEpoch;
+  int endTime = (new DateTime.now()).millisecondsSinceEpoch;
   expect(endTime - startTime, greaterThanOrEqualTo(timeout));
   if (iteration < ITERATIONS) {
     iteration++;
     timeout = timeout - DECREASE;
-    startTime = (new Date.now()).millisecondsSinceEpoch;
+    startTime = (new DateTime.now()).millisecondsSinceEpoch;
     new Timer(timeout, expectAsync1(timeoutHandler));
   }
 }
@@ -30,7 +30,7 @@ main() {
   test("timeout test", () {
     iteration = 0;
     timeout = STARTTIMEOUT;
-    startTime = (new Date.now()).millisecondsSinceEpoch;
+    startTime = (new DateTime.now()).millisecondsSinceEpoch;
     new Timer(timeout, expectAsync1(timeoutHandler));
   });
 }