Add ClosureInfo for closures.

test/parse_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.
 
 import 'dart:convert';
 import 'dart:io';
 
 import 'package:dart2js_info/info.dart';
 import 'package:test/test.dart';
 
 main() {
   group('parse', () {
     test('hello_world', () {
       var helloWorld = new File('test/hello_world/hello_world.js.info.json');
       var json = JSON.decode(helloWorld.readAsStringSync());
       var decoded = new AllInfoJsonCodec().decode(json);
 
       var program = decoded.program;
       expect(program, isNotNull);
 
       expect(program.entrypoint, isNotNull);
-      expect(program.size, 10124);
+      expect(program.size, 10116);
       expect(program.compilationMoment,
-          DateTime.parse("2016-09-30 16:14:58.038530"));
-      expect(program.compilationDuration, new Duration(microseconds: 2726976));
+          DateTime.parse("2016-10-06 10:14:59.145665"));
+      expect(program.compilationDuration, new Duration(microseconds: 2729236));
       expect(program.toJsonDuration, new Duration(milliseconds: 4));
       expect(program.dumpInfoDuration, new Duration(seconds: 0));
       expect(program.noSuchMethodEnabled, false);
       expect(program.minified, false);
     });
   });
 }