Compute and cache element NativeBehavior during resolution.

pkg/compiler/lib/src/common/backend_api.dart

 // Copyright (c) 2012, 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.backend_api;
 
 import 'dart:async' show Future;
 
 import '../common.dart';
 import '../common/codegen.dart' show CodegenImpact;
@@ skipping 26 matching lines @@
 import '../serialization/serialization.dart'
     show DeserializerPlugin, SerializerPlugin;
 import '../tree/tree.dart' show Node, Send;
 import '../universe/call_structure.dart' show CallStructure;
 import '../universe/world_impact.dart' show ImpactStrategy, WorldImpact;
 import 'codegen.dart' show CodegenWorkItem;
 import 'registry.dart' show Registry;
 import 'tasks.dart' show CompilerTask;
 import 'work.dart' show ItemCompilationContext;
 
-abstract class Backend implements Target {
+abstract class Backend extends Target {
   final Compiler compiler;
 
   Backend(this.compiler);
 
   /// Returns true if the backend supports reflection.
   bool get supportsReflection;
 
   /// Returns true if the backend supports reflection.
   bool get supportsAsyncAwait;
 
@@ skipping 339 matching lines @@
       bool supportSerialization: true}) {
     return const ImpactStrategy();
   }
 
   /// Backend access to the front-end.
   Frontend get frontend => compiler.resolution;
 
   EnqueueTask makeEnqueuer() => new EnqueueTask(compiler);
 }
 
+/// Interface for resolving native data for a target specific element.
+abstract class NativeRegistry {
+  /// Registers [nativeData] as part of the resolution impact.
+  void registerNativeData(dynamic nativeData);
+}
+
 /// Interface for resolving calls to foreign functions.
 abstract class ForeignResolver {
   /// Returns the constant expression of [node], or `null` if [node] is not
   /// a constant expression.
   ConstantExpression getConstant(Node node);
 
   /// Registers [type] as instantiated.
   void registerInstantiatedType(InterfaceType type);
 
   /// Resolves [typeName] to a type in the context of [node].
@@ skipping 15 matching lines @@
   }
 }
 
 /// Interface for serialization of backend specific data.
 class BackendSerialization {
   const BackendSerialization();
 
   SerializerPlugin get serializer => const SerializerPlugin();
   DeserializerPlugin get deserializer => const DeserializerPlugin();
 }