Handle resolvedAst for forwarding constructors and callType on unnamed mixin applications.

tests/compiler/dart2js/parser_helper.dart

 // Copyright (c) 2016, 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 parser_helper;
 
 import "package:expect/expect.dart";
 
 import "package:compiler/src/elements/elements.dart";
 import 'package:compiler/src/id_generator.dart';
@@ skipping 74 matching lines @@
 
   @override
   DiagnosticMessage createMessage(
       Spannable spannable,
       MessageKind messageKind,
       [Map arguments = const {}]) {
     return new DiagnosticMessage(
         null, spannable,
         new Message(MessageTemplate.TEMPLATES[messageKind], arguments, false));
   }
+
+  @override
+  bool get hasReportedError => false;
 }
 
 Token scan(String text) =>
     new StringScanner.fromString(text)
     .tokenize();
 
 Node parseBodyCode(String text, Function parseMethod,
                    {DiagnosticReporter reporter}) {
   Token tokens = scan(text);
   if (reporter == null) reporter = new LoggerCanceler();
@@ skipping 54 matching lines @@
   reporter.withCurrentElement(unit, () => parser.parseUnit(tokens));
   return unit.localMembers;
 }
 
 NodeList fullParseUnit(String source, {DiagnosticReporter reporter}) {
   return parseBodyCode(
       source,
       (parser, tokens) => parser.parseUnit(tokens),
       reporter: reporter);
 }