Rebased and retested version of CL 1915123008.

pkg/compiler/lib/src/serialization/resolved_ast_serialization.dart

 // Copyright (c) 2016, 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.resolved_ast;
 
 import '../common.dart';
 import '../common/resolution.dart';
 import '../constants/expressions.dart';
 import '../dart_types.dart';
@@ skipping 411 matching lines @@
                 valueBuilder.literalInt(enumConstant.index),
                 valueBuilder
                     .literalString('${enumClass.name}.${name.source}')));
           }
 
           // TODO(johnniwinther): Support return type. Note `String` might be
           // prefixed or not imported within the current library.
           FunctionExpression toStringNode = builder.functionExpression(
               Modifiers.EMPTY,
               'toString',
+              null,
               builder.argumentList([]),
               builder.returnStatement(builder.indexGet(
                   builder.mapLiteral(mapEntries, isConst: true),
                   builder.reference(builder.identifier('index')))));
           return toStringNode;
         case AstKind.ENUM_CONSTRUCTOR:
           AstBuilder builder = new AstBuilder(element.sourcePosition.begin);
           VariableDefinitions indexDefinition =
               builder.initializingFormal('index');
           FunctionExpression constructorNode = builder.functionExpression(
               builder.modifiers(isConst: true),
               element.enclosingClass.name,
+              null,
               builder.argumentList([indexDefinition]),
               builder.emptyStatement());
           return constructorNode;
         case AstKind.ENUM_CONSTANT:
           EnumConstantElement enumConstant = element;
           EnumClassElement enumClass = element.enclosingClass;
           int index = enumConstant.index;
           AstBuilder builder = new AstBuilder(element.sourcePosition.begin);
           Identifier name = builder.identifier(element.name);
 
@@ skipping 167 matching lines @@
           var nativeData = nativeDataDeserializer.onData(nativeDataDecoder);
           if (nativeData != null) {
             elements.registerNativeData(node, nativeData);
           }
         }
       }
     }
     return new ParsedResolvedAst(element, root, body, elements);
   }
 }