Store and serialize NativeBehavior in TreeElements.

pkg/compiler/lib/src/serialization/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;
 
 import '../elements/elements.dart';
 import '../constants/expressions.dart';
 import '../dart_types.dart';
 import '../util/enumset.dart';
@@ skipping 839 matching lines @@
 
 /// Plugin for serializing additional data for an [Element].
 class SerializerPlugin {
   const SerializerPlugin();
 
   /// Called upon the serialization of [element].
   ///
   /// Use [creatorEncoder] to create a data object with id [tag] for storing
   /// additional data for [element].
   void onElement(Element element, ObjectEncoder createEncoder(String tag)) {}
+
+  /// Called to serialize custom [data].
+  void onData(var data, ObjectEncoder encoder) {}
 }
 
 /// Plugin for deserializing additional data for an [Element].
 class DeserializerPlugin {
   const DeserializerPlugin();
 
   /// Called upon the deserialization of [element].
   ///
   /// Use [getDecoder] to retrieve the data object with id [tag] stored for
   /// [element]. If not object is stored for [tag], [getDecoder] returns `null`.
   void onElement(Element element, ObjectDecoder getDecoder(String tag)) {}
+
+  /// Called to deserialize custom data from [decoder].
+  dynamic onData(ObjectDecoder decoder);
 }
 
 /// Context for parallel deserialization.
 class DeserializationContext {
   Map<Uri, LibraryElement> _uriMap = <Uri, LibraryElement>{};
   List<Deserializer> deserializers = <Deserializer>[];
 
   LibraryElement lookupLibrary(Uri uri) {
     return _uriMap.putIfAbsent(uri, () {
       for (Deserializer deserializer in deserializers) {
@@ skipping 153 matching lines @@
 
   /// Returns the value used to store [key] as a property in the encoding an
   /// [ObjectValue].
   ///
   /// Different encodings have different restrictions and capabilities as how
   /// to store a [Key] value. For instance: A JSON encoding needs to convert
   /// [Key] to a [String] to store it in a JSON object; a Dart encoding can
   /// choose to store a [Key] as an [int] or as the [Key] itself.
   getObjectPropertyValue(Key key);
 }