WIP: Compute constant expressions in resolution.

pkg/compiler/lib/src/serialization/constant_serialization.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 dart2js.serialization.constants;
 
 import '../constants/constructors.dart';
 import '../constants/expressions.dart';
 import '../dart_types.dart';
 import '../elements/elements.dart' show
@@ skipping 340 matching lines @@
   void visitRedirectingGenerative(
       RedirectingGenerativeConstantConstructor constructor,
       ObjectEncoder encoder) {
     MapEncoder defaults = encoder.createMap(Key.DEFAULTS);
     constructor.defaultValues.forEach((key, ConstantExpression e) {
       defaults.setConstant('$key', e);
     });
     encoder.setConstant(Key.CONSTRUCTOR,
         constructor.thisConstructorInvocation);
   }
+
+  @override
+  visitErroneous(ErroneousConstantConstructor constructor, ObjectEncoder arg) {
+    // Nothing to add; the kind has been serialized.
+  }
 }
 /// Utility class for deserializing [ConstantConstructor]s.
 ///
 /// This is used by the [ConstructorElementZ].
 class ConstantConstructorDeserializer {
   /// Deserializes a [ConstantConstructor] from an [ObjectDecoder].
   ///
   /// The class is called from the [Deserializer] when a constant constructor
   /// needs deserialization. The [ObjectDecoder] ensures that any [Element],
   /// [DartType], and [ConstantExpression] that the deserialized
@@ skipping 50 matching lines @@
             readDefaults(),
             readFields(),
             readConstructorInvocation());
       case ConstantConstructorKind.REDIRECTING_GENERATIVE:
         return new RedirectingGenerativeConstantConstructor(
             readDefaults(),
             readConstructorInvocation());
       case ConstantConstructorKind.REDIRECTING_FACTORY:
         return new RedirectingFactoryConstantConstructor(
             readConstructorInvocation());
+      case ConstantConstructorKind.ERRONEOUS:
+        return const ErroneousConstantConstructor();
     }
   }
 }