Revert "Refactor Date implementation in VM."

lib/compiler/implementation/lib/js_helper.dart

Index: lib/compiler/implementation/lib/js_helper.dart
diff --git a/lib/compiler/implementation/lib/js_helper.dart b/lib/compiler/implementation/lib/js_helper.dart
index f25f41ad1f88d96b4090c9c4b1b1bc15b3fcb422..69c3823d6015c98351e67cceb814a64ad6364377 100644
--- a/lib/compiler/implementation/lib/js_helper.dart
+++ b/lib/compiler/implementation/lib/js_helper.dart
@@ -489,7 +489,7 @@ class Primitives {
       value = JS('num', @'new Date(#, #, #, #, #, #, #).valueOf()',
                  years, jsMonth, day, hours, minutes, seconds, milliseconds);
     }
-    if (value.isNaN()) throw new IllegalArgumentException();
+    if (value.isNaN()) throw new IllegalArgumentException('');
     if (years <= 0 || years < 100) return patchUpY2K(value, years, isUtc);
     return value;
   }