Update tests to new syntax.

dart/tests/language/getters_setters_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.
 
 class GettersSettersTest {
 
   static int foo;
 
   static testMain() {
     A a = new A();
@@ skipping 44 matching lines @@
     Expect.equals(1, rf.getIt());
     rf.setIt(2);
     Expect.equals(2, rf.x_);
   }
 }
 
 class A {
   int x_;
   static int foo;
 
-  static get bar() {
+  static get bar {
     return foo;
   }
 
   static set bar(newValue) {
     foo = newValue;
   }
 
-  int get x() {
+  int get x {
     return x_;
   }
 
   void set x(int value) {
     x_ = value;
   }
 
   bool isXPositive() {
     return x > 0;
   }
@@ skipping 13 matching lines @@
 
 class B extends A { }
 
 class C extends A {
   int y_;
 
   C() : super() {
     this.x_ = 0;
   }
 
-  int get x() {
+  int get x {
     return y_;
   }
 
   void set x(int value) {
     y_ = value;
   }
 }
 
 class D extends A {
   var x2_;
 
   set x(new_x) {
     x2_ = new_x;
   }
 
   test() {
     x = 87;
     Expect.equals(87, x2_);
     x = 42;
     Expect.equals(42, x2_);
   }
 }
 
 class OverrideField extends A {
-  int get x_() {
+  int get x_ {
     return 27;
   }
 }
 
 class ReferenceField extends A {
   setIt(a) {
      super.x_ = a;
   }
 
   int getIt() {
      return super.x_;
   }
 }
 
 main() {
   GettersSettersTest.testMain();
 }