Cleaning up event constructors

tests/html/wheelevent_test.dart

Index: tests/html/wheelevent_test.dart
diff --git a/tests/html/wheelevent_test.dart b/tests/html/wheelevent_test.dart
index fed10deb7c84be7294529d11037934f5639b773e..124ff243729738916cf7bd6104937e8cc185f610 100644
--- a/tests/html/wheelevent_test.dart
+++ b/tests/html/wheelevent_test.dart
@@ -36,15 +36,9 @@ main() {
       expect(e.deltaY, 240);
     }));
     var event = new WheelEvent(wheelEvent,
-      window,
-      0,
-      240,
-      0,
-      100,
-      200,
-      10,
-      20,
-      0);
+      deltaX: 0,
+      deltaY: 240,
+      screenX: 100);
     element.$dom_dispatchEvent(event);
   });
 
@@ -56,15 +50,9 @@ main() {
       expect(e.deltaY, 240);
     }));
     var event = new WheelEvent(wheelEvent,
-      window,
-      0,
-      240,
-      0,
-      100,
-      200,
-      10,
-      20,
-      0);
+      deltaX: 0,
+      deltaY: 240,
+      screenX: 100);
     element.$dom_dispatchEvent(event);
   });
 }