Get rid of a lot of () for getters.

lib/html/src/CloseEventWrappingImplementation.dart

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 class CloseEventWrappingImplementation extends EventWrappingImplementation implements CloseEvent {
   CloseEventWrappingImplementation._wrap(ptr) : super._wrap(ptr);
 
   factory CloseEventWrappingImplementation(String type, int code, String reason,
       [bool canBubble = true, bool cancelable = true, bool wasClean = true]) {
     final e = dom.document.createEvent("CloseEvent");
     e.initCloseEvent(type, canBubble, cancelable, wasClean, code, reason);
     return LevelDom.wrapCloseEvent(e);
   }
 
-  int get code() => _ptr.code;
+  int get code => _ptr.code;
 
-  String get reason() => _ptr.reason;
+  String get reason => _ptr.reason;
 
-  bool get wasClean() => _ptr.wasClean;
+  bool get wasClean => _ptr.wasClean;
 }