Get rid of a lot of () for getters.

lib/dom/src/native_DOMImplementation.dart

 // Copyright (c) 2012, 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 _Utils {
   static List convertToList(List list) {
     // FIXME: [possible optimization]: do not copy the array if Dart_IsArray is fine w/ it.
     final length = list.length;
     List result = new List(length);
     result.setRange(0, length, list);
@@ skipping 45 matching lines @@
   DOMWindow get parent() native "DOMWindow_parent_Getter";
   DOMWindow get top() native "DOMWindow_top_Getter";
 
   // Methods.
   void focus() native "DOMWindow_focus_Callback";
   void blur() native "DOMWindow_blur_Callback";
   void close() native "DOMWindow_close_Callback";
   void postMessage(/*SerializedScriptValue*/ message, String targetOrigin, [List messagePorts]) native "DOMWindow_postMessage_Callback";
 
   // Implementation support.
-  String get typeName() => "DOMWindow";
+  String get typeName => "DOMWindow";
 }
 
 class _HistoryCrossFrameImpl extends NativeFieldWrapperClass1 implements History {
   _HistoryCrossFrameImpl();
 
   // Methods.
   void back() native "History_back_Callback";
   void forward() native "History_forward_Callback";
   void go(int distance) native "History_go_Callback";
 
   // Implementation support.
-  String get typeName() => "History";
+  String get typeName => "History";
 }
 
 class _LocationCrossFrameImpl extends NativeFieldWrapperClass1 implements Location {
   _LocationCrossFrameImpl();
 
   // Fields.
   void set href(String) native "Location_href_Setter";
 
   // Implementation support.
-  String get typeName() => "Location";
+  String get typeName => "Location";
 }
 
 class _DOMStringMapImpl extends NativeFieldWrapperClass1 implements Map<String, String> {
   _DOMStringMapImpl();
 
   bool containsValue(String value) => Maps.containsValue(this, value);
   bool containsKey(String key) native "DOMStringMap_containsKey_Callback";
   String operator [](String key) native "DOMStringMap_item_Callback";
   void operator []=(String key, String value) native "DOMStringMap_setItem_Callback";
   String putIfAbsent(String key, String ifAbsent()) => Maps.putIfAbsent(this, key, ifAbsent);
   String remove(String key) native "DOMStringMap_remove_Callback";
   void clear() => Maps.clear(this);
   void forEach(void f(String key, String value)) => Maps.forEach(this, f);
   Collection<String> getKeys() native "DOMStringMap_getKeys_Callback";
   Collection<String> getValues() => Maps.getValues(this);
-  int get length() => Maps.length(this);
+  int get length => Maps.length(this);
   bool isEmpty() => Maps.isEmpty(this);
 }
 
 get _printClosure => (s) {
   try {
     window.console.log(s);
   } on Dynamic catch(_) {
     _Utils.print(s);
   }
 };