Use correct types on cloned constructors in mixin applications.

pkg/front_end/lib/src/fasta/kernel/verifier.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 fasta.verifier;
 
 import 'package:kernel/ast.dart'
     show
         InvalidExpression,
         InvalidStatement,
@@ skipping 24 matching lines @@
   final List<VerificationError> errors = <VerificationError>[];
 
   String fileUri;
 
   FastaVerifyingVisitor(bool isOutline) {
     this.isOutline = isOutline;
   }
 
   @override
   problem(TreeNode node, String details) {
-    // TODO(karlklose): Remove this when underlying problem is fixed.
-    if (details.startsWith("Type parameter 'dart.collection::MapView::")) {
-      return;
-    }
     VerificationError error = new VerificationError(context, node, details);
     printUnexpected(Uri.parse(fileUri), node.fileOffset, "$error");
     errors.add(error);
   }
 
   @override
   visitExpressionStatement(ExpressionStatement node) {
     // Bypass verification of the [StaticGet] in [RedirectingFactoryBody] as
     // this is a static get without a getter.
     if (node is! RedirectingFactoryBody) {
@@ skipping 33 matching lines @@
   @override
   visitInvalidStatement(InvalidStatement node) {
     problem(node, "Invalid statement.");
   }
 
   @override
   visitInvalidInitializer(InvalidInitializer node) {
     problem(node, "Invalid initializer.");
   }
 }