Additional fixes to printing of error codes.

pkg/analyzer/test/generated/test_support.dart

 // Copyright (c) 2014, 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.
 
 // This code was auto-generated, is not intended to be edited, and is subject to
 // significant change. Please see the README file for more information.
 
 library engine.test_support;
 
 import 'dart:collection';
@@ skipping 275 matching lines @@
         actualCount = list.length;
       }
       if (actualCount != expectedCount) {
         if (buffer.length == 0) {
           buffer.write("Expected ");
         } else {
           buffer.write("; ");
         }
         buffer.write(expectedCount);
         buffer.write(" errors of type ");
-        buffer.write("${code.runtimeType}.$code");
+        buffer.write(code.uniqueName);
         buffer.write(", found ");
         buffer.write(actualCount);
       }
     });
     //
     // Check that there are no more errors in the actual-errors map,
     // otherwise record message.
     //
     errorsByCode.forEach((ErrorCode code, List<AnalysisError> actualErrors) {
       int actualCount = actualErrors.length;
@@ skipping 331 matching lines @@
   void getContentsToReceiver(Source_ContentReceiver receiver) {
     throw new UnsupportedOperationException();
   }
   Source resolve(String uri) {
     throw new UnsupportedOperationException();
   }
   Uri resolveRelativeUri(Uri uri) {
     return new Uri(scheme: 'file', path: _name).resolveUri(uri);
   }
 }