Update language tests to new getter syntax.

dart/tests/language/field_test.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.
 // Dart test program for testing setting/getting of instance fields.
 
 class First {
   First() {}
   var a;
   var b;
 
   addFields() {
     return a + b;
   }
 
   setValues() {
     a = 24;
     b = 10;
     return a + b;
   }
 }
 
 class Second extends First {
   // TODO: consider removing once http://b/4254120 is fixed.
   Second() : super() {}
   var c;
-  get a() { return -12; }
+  get a { return -12; }
   set b(a) { a.c = 12; }
 }
 
 class FieldTest {
   static one() {
     var f = new First();
     f.a = 3;
     f.b = f.a;
     Expect.equals(3, f.a);
     Expect.equals(f.a, f.b);
@@ skipping 25 matching lines @@
   static testMain() {
     // FieldTest.one();
     FieldTest.two();
   }
 }
 
 
 main() {
   FieldTest.testMain();
 }