Fix incorrect unparse of static/final fields in classes:

tests/compiler/dart2js/unparser_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.
 
 #import('dart:uri');
 #import('parser_helper.dart');
 #import("../../../lib/compiler/compiler.dart");
 #import("../../../lib/compiler/implementation/tree/tree.dart");
 
 testUnparse(String statement) {
@@ skipping 129 matching lines @@
 }
 
 testClassWithMethod() {
   testDart2Dart('main(){var a=new A(); a.foo();}class A{void foo(){}}');
 }
 
 testVariableDefinitions() {
   testDart2Dart('main(){final var x, y; final String s;}');
   testDart2Dart('foo(f, g){}main(){foo(1, 2);}');
   testDart2Dart('foo(f(arg)){}main(){foo(main);}');
+  // A couple of static/finals inside a class.
+  testDart2Dart('main(){A.a; A.b;}class A{static final String a="5";'
+      'static final String b="4";}');
 }
 
 testGetSet() {
   // Top-level get/set.
   testDart2Dart('get foo(){return 5;}set foo(arg){}main(){foo; foo=5;}');
   // Field get/set.
   testDart2Dart('main(){var a=new A(); a.foo; a.foo=5;}class A{set foo(a){}get foo(){return 5;}}');
   // Typed get/set.
   testDart2Dart('String get foo(){return "a";}main(){foo;}');
 }
 
 main() {
   testGenericTypes();
   testForLoop();
   testEmptyList();
   testClosure();
   testIndexedOperatorDecl();
   testNativeMethods();
   testPrefixIncrements();
   testConstModifier();
   testSimpleFileUnparse();
   testSimpleObjectInstantiation();
   testSimpleTopLevelClass();
   testClassWithSynthesizedConstructor();
   testClassWithMethod();
   testVariableDefinitions();
   testGetSet();
   testTopLevelField();
 }