Get rid of a lot of () for getters.

tests/standalone/io/file_test.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.
 //
 // Dart test program for testing file I/O.
 
 #import("dart:io");
 #import("dart:isolate");
 
 class MyListOfOneElement implements List {
   int _value;
   MyListOfOneElement(this._value);
-  int get length() => 1;
+  int get length => 1;
   operator [](int index) => _value;
 }
 
 class FileTest {
   static Directory tempDirectory;
   static int numLiveAsyncTests = 0;
   static ReceivePort port;
 
   static void asyncTestStarted() { ++numLiveAsyncTests; }
   static void asyncTestDone(String name) {
@@ skipping 1249 matching lines @@
       testWriteVariousLists();
       testDirectory();
       testDirectorySync();
     });
   }
 }
 
 main() {
   FileTest.testMain();
 }