Resynth the 'final' property of top-level variables.

pkg/analyzer/test/src/summary/resynthesize_test.dart

 // Copyright (c) 2015, 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.
 
 library test.src.serialization.elements_test;
 
 import 'package:analyzer/src/generated/element.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/resolver.dart' show Namespace;
 import 'package:analyzer/src/generated/source.dart';
@@ skipping 1368 matching lines @@
 
   test_variable_documented() {
     checkLibrary('''
 // Extra comment so doc comment offset != 0
 /**
  * Docs
  */
 var x;''');
   }
 
+  test_variable_final() {
+    checkLibrary('final int x = 0;');
+  }
+
   test_variable_implicit_type() {
     checkLibrary('var x;');
   }
 
   test_variables() {
     checkLibrary('int i; int j;');
   }
 }