Update language tests to new getter syntax.

dart/tests/language/optimized_setter_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.
 // Test various setter situations, testing special cases in optimizing compiler.
 
 class A {
   int field = 0;
 }
 
 class B extends A {
@@ skipping 47 matching lines @@
     var r = maybeSet(a, 6, true);
     Expect.equals(6, a.field);
     Expect.equals(6, r);
   }
 }
 
 // Check non-implicit setter
 class X {
   int pField = 0;
   set field(v) { pField = v; }
-  get field() => 10;
+  get field => 10;
 }
 
 void sameNotImplicitSetter() {
   oneTarget(var a, var v) {
     return a.field = v;
   }
 
   incField(var a) {
     a.field++;
   }
@@ skipping 30 matching lines @@
     Expect.equals(5, r);
     r = oneTarget(y, 6);
     Expect.equals(6, y.field);
     Expect.equals(6, r);
   } 
 }
 
 class Z {
   int pField = 0;
   set field(v) { pField = v; }
-  get field() => 10;
+  get field => 10;
 }
 
 multiNotImplicitSetter() {
   oneTarget(var a, var v) {
     return a.field = v;
   }
 
   Y y = new Y();
   Z z = new Z();
   for (int i = 0; i < 2000; i++) {
@@ skipping 12 matching lines @@
 
 void main() {
   for (int i = 0; i< 2000; i++) {}
   sameImplicitSetter();
   setterNoFeedback();
   sameNotImplicitSetter();
 
   multiImplicitSetter();
   multiNotImplicitSetter();
 }