Option to disable message widget

lib/src/testing.dart

 // Copyright (c) 2015, 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 dev_compiler.src.testing;
 
 import 'dart:collection' show Queue;
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/file_system/memory_file_system.dart';
 import 'package:analyzer/src/generated/ast.dart';
@@ skipping 76 matching lines @@
       var errorInfo = checker.computeErrors(unit.source);
       new _ExpectedErrorVisitor(errorInfo.errors).validate(unit.unit);
     }
   }
 }
 
 /// Creates a [MemoryResourceProvider] with test data
 MemoryResourceProvider createTestResourceProvider(
     Map<String, String> testFiles) {
   var provider = new MemoryResourceProvider();
-  runtimeFilesForServerMode.forEach((filepath) {
+  runtimeFilesForServerMode().forEach((filepath) {
     testFiles['/dev_compiler_runtime/$filepath'] =
         '/* test contents of $filepath */';
   });
   testFiles.forEach((key, value) {
     var scheme = 'package:';
     if (key.startsWith(scheme)) {
       key = '/packages/${key.substring(scheme.length)}';
     }
     provider.newFile(key, value);
   });
@@ skipping 135 matching lines @@
     expect(tokens[1], "should", reason: 'invalid error descriptor');
     expect(tokens[2], "be", reason: 'invalid error descriptor');
     if (tokens[0] == "pass") return null;
     // TODO(leafp) For now, we just use whatever the current expectation is,
     // eventually we could do more automated reporting here.
     return _parse(tokens[0]);
   }
 
   String toString() => '$level $typeName';
 }