Support new getter syntax.

dart/tests/compiler/dart2js_native/native_exceptions1_frog_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 that hidden native exception classes can be marked as existing.
 //
 // To infer which native hidden types exist, we need
 //   (1) return types of native methods and getters
 //   (2) argument types of callbacks
 //   (3) exceptions thrown by the operation.
@@ skipping 13 matching lines @@
 // Type with exception-throwing methods.
 class A native "*A" {
   op(int x) native {
     // Fake body calls constructor to mark the exception class (E) as used.
     throw new E._used();
   }
 }
 
 // This class is here just so that a dynamic context is polymorphic.
 class B {
-  int get code() => 666;
+  int get code => 666;
   op(String x) => 123;
 }
 
 makeA() native;
 
 void setup1() native """
 // Ensure we are not relying on global names 'A' and 'E'.
 A = null;
 E = null;
 """;
@@ skipping 45 matching lines @@
   threw = false;
   try {
     var x = aa.op(51);
   } catch (E e) {
     threw = true;
     Expect.equals(100, e.code);
     Expect.isTrue(e is E);
   }
   Expect.isTrue(threw);
 }