Support new getter syntax.

dart/tests/compiler/dart2js_extra/getters_setters_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.
 
 class GettersSettersTest {
 
   static int foo;
 
-  static get bar() {
+  static get bar {
     return foo;
   }
 
   static set bar(newValue) {
     foo = newValue;
   }
 
   static testMain() {
     A a = new A();
     a.x = 2;
@@ skipping 42 matching lines @@
     Expect.equals(43, A.foo);
     Expect.equals(43, A.bar);
   }
 }
 
 class A {
   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 15 matching lines @@
   B();
 }
 
 class C extends A {
   int y_;
 
   C() {
     this.x_ = 0;
   }
 
-  int get x() {
+  int get x {
     return y_;
   }
 
   void set x(int value) {
     y_ = value;
   }
 }
 
 main() {
   GettersSettersTest.testMain();
 }