Don't assume that we always have a HowToFix and remove failing test.

pkg/compiler/lib/src/typechecker.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 dart2js.typechecker;
 
 import 'common.dart';
 import 'common/names.dart' show
     Identifiers;
 import 'common/resolution.dart' show
@@ skipping 824 matching lines @@
             break;
           case MemberKind.OPERATOR:
             reportMessage(node, MessageKind.UNDEFINED_OPERATOR,
                 {'className': receiverType.name, 'memberName': name},
                 isHint: isHint);
             break;
           case MemberKind.GETTER:
             if (lookupMemberSignature(memberName.setter, interface) != null) {
               // A setter is present so warn explicitly about the missing
               // getter.
-              reportMessage(node, MessageKind.UNDEFINED_INSTANCE_GETTER_BUT_SETTER,
+              reportMessage(node,
+                  MessageKind.UNDEFINED_INSTANCE_GETTER_BUT_SETTER,
                   {'className': receiverType.name, 'memberName': name},
                   isHint: isHint);
             } else if (name == 'await') {
               Map arguments = {'className': receiverType.name};
               String functionName = executableContext.name;
               MessageKind kind;
               if (functionName == '') {
                 kind = MessageKind.AWAIT_MEMBER_NOT_FOUND_IN_CLOSURE;
               } else {
                 kind = MessageKind.AWAIT_MEMBER_NOT_FOUND;
@@ skipping 1147 matching lines @@
 
   visitTypedef(Typedef node) {
     // Do not typecheck [Typedef] nodes.
   }
 
   visitNode(Node node) {
     reporter.internalError(node,
         'Unexpected node ${node.getObjectDescription()} in the type checker.');
   }
 }