Update status file, and fix unit tests.

tests/compiler/dart2js/mock_compiler.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.
 
 library mock_compiler;
 
 import "package:expect/expect.dart";
 import 'dart:async';
 import 'dart:collection';
 
@@ skipping 186 matching lines @@
   }
   abstract class Map<K,V> {}
   class DateTime {
     DateTime(year);
     DateTime.utc(year);
   }
   abstract class Pattern {}
   bool identical(Object a, Object b) { return true; }''';
 
 const String DEFAULT_ISOLATE_HELPERLIB = r'''
+  var startRootIsolate;
+  var _currentIsolate;
+  var _callInIsolate;
   class _WorkerBase {}''';
 
 class MockCompiler extends Compiler {
   api.DiagnosticHandler diagnosticHandler;
   List<WarningMessage> warnings;
   List<WarningMessage> errors;
   List<WarningMessage> hints;
   List<WarningMessage> infos;
   final Map<String, SourceFile> sourceFiles;
   Node parsedTree;
@@ skipping 282 matching lines @@
     } else {
       sourceFile = compiler.sourceFiles[uri.toString()];
     }
     if (sourceFile != null && begin != null && end != null) {
       print(sourceFile.getLocationMessage(message, begin, end, true, (x) => x));
     } else {
       print(message);
     }
   };
 }