Collect closure functions in isolate

runtime/observatory/tests/service/coverage_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.
 // VMOptions=--error_on_bad_type --error_on_bad_override
 
 import 'package:observatory/service_io.dart';
 import 'package:unittest/unittest.dart';
 import 'test_helper.dart';
 import 'dart:developer';
 
@@ skipping 57 matching lines @@
   expect(coverage['type'], equals('CodeCoverage'));
   expect(coverage['coverage'].length, equals(1));
   expect(coverage['coverage'][0]['hits'],
          equals([15, 1, 16, 0, 18, 1, 20, 1,
                  24, 1, 25, 1, 27, 0]));
 
   // Library
   coverage = await isolate.invokeRpcNoUpgrade('_getCoverage',
                                               { 'targetId': lib.id });
   expect(coverage['type'], equals('CodeCoverage'));
-  expect(coverage['coverage'].length, equals(3));
+  expect(coverage['coverage'].length, equals(4));
   expect(coverage['coverage'][0]['hits'],
          equals([15, 1, 16, 0, 18, 1, 20, 1,
                  24, 1, 25, 1, 27, 0]));
   expect(coverage['coverage'][1]['hits'],
          equals([33, 1, 34, 1, 105, 2]));
 
   // Script
   await cls.load();
   coverage = await isolate.invokeRpcNoUpgrade('_getCoverage',
                                        { 'targetId': cls.location.script.id });
   expect(coverage['type'], equals('CodeCoverage'));
-  expect(coverage['coverage'].length, equals(3));
+  expect(coverage['coverage'].length, equals(4));
   expect(coverage['coverage'][0]['hits'],
          equals([15, 1, 16, 0, 18, 1, 20, 1,
                  24, 1, 25, 1, 27, 0]));
   expect(coverage['coverage'][1]['hits'],
          equals([33, 1, 34, 1, 105, 2]));
 
   // Isolate
   coverage = await isolate.invokeRpcNoUpgrade('_getCoverage', {});
   expect(coverage['type'], equals('CodeCoverage'));
   expect(coverage['coverage'].length, greaterThan(100));
 },
 
 ];
 
 main(args) => runIsolateTests(args, tests, testeeConcurrent: testFunction);