Incremental compilation: test giving up.

dart/tests/try/web/program_result.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.
 
 library trydart.test.program_result;
 
 class ProgramResult {
   final String code;
 
   final List<String> messages;
 
-  const ProgramResult(this.code, this.messages);
+  final bool compileUpdatesShouldThrow;
+
+  const ProgramResult(
+      this.code, this.messages, {this.compileUpdatesShouldThrow: false});
 
   List<String> messagesWith(String extra) {
     return new List<String>.from(messages)..add(extra);
   }
 }