Add Class/MemberDefinition to handle synthesized classes/members

pkg/compiler/lib/src/kernel/env.dart

 // Copyright (c) 2017, 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.kernel.env;
 
 import 'package:kernel/ast.dart' as ir;
 import 'package:kernel/clone.dart';
 import 'package:kernel/type_algebra.dart';
 
@@ skipping 312 matching lines @@
     }
   }
 
   void forEachConstructor(void f(ir.Member member)) {
     _ensureMaps();
     _constructorMap.values.forEach(f);
   }
 }
 
 class ClassData {
+  /// TODO(johnniwinther): Remove this from the [MemberData] interface. Use
+  /// `definition.node` instead.
   final ir.Class cls;
+  final ClassDefinition definition;
   bool isMixinApplication;
 
   InterfaceType thisType;
   InterfaceType rawType;
   InterfaceType supertype;
   InterfaceType mixedInType;
   List<InterfaceType> interfaces;
   OrderedTypeSet orderedTypeSet;
 
   Iterable<ConstantValue> _metadata;
 
-  ClassData(this.cls);
+  ClassData(this.cls, this.definition);
 
   Iterable<ConstantValue> getMetadata(KernelToElementMapBase elementMap) {
     return _metadata ??= elementMap.getMetadata(cls.annotations);
   }
 
   ClassData copy() {
-    return new ClassData(cls);
+    return new ClassData(cls, definition);
   }
 }
 
 class MemberData {
+  /// TODO(johnniwinther): Remove this from the [MemberData] interface. Use
+  /// `definition.node` instead.
   final ir.Member node;
+
+  final MemberDefinition definition;
+
   Iterable<ConstantValue> _metadata;
 
-  MemberData(this.node);
+  MemberData(this.node, this.definition);
 
   ResolutionImpact getWorldImpact(KernelToElementMapForImpact elementMap) {
     return buildKernelImpact(node, elementMap);
   }
 
   Iterable<ConstantValue> getMetadata(KernelToElementMapBase elementMap) {
     return _metadata ??= elementMap.getMetadata(node.annotations);
   }
 
   MemberData copy() {
-    return new MemberData(node);
+    return new MemberData(node, definition);
   }
 }
 
 class FunctionData extends MemberData {
   final ir.FunctionNode functionNode;
   FunctionType _type;
 
-  FunctionData(ir.Member node, this.functionNode) : super(node);
+  FunctionData(ir.Member node, this.functionNode, MemberDefinition definition)
+      : super(node, definition);
 
   FunctionType getFunctionType(KernelToElementMapBase elementMap) {
     return _type ??= elementMap.getFunctionType(functionNode);
   }
 
   void forEachParameter(KernelToElementMapForBuilding elementMap,
       void f(DartType type, String name, ConstantValue defaultValue)) {
     void handleParameter(ir.VariableDeclaration node, {bool isOptional: true}) {
       DartType type = elementMap.getDartType(node.type);
       String name = node.name;
@@ skipping 12 matching lines @@
       handleParameter(functionNode.positionalParameters[i],
           isOptional: i < functionNode.requiredParameterCount);
     }
     functionNode.namedParameters.toList()
       ..sort(namedOrdering)
       ..forEach(handleParameter);
   }
 
   @override
   FunctionData copy() {
-    return new FunctionData(node, functionNode);
+    return new FunctionData(node, functionNode, definition);
   }
 }
 
 class ConstructorData extends FunctionData {
   ConstantConstructor _constantConstructor;
   ConstructorBodyEntity constructorBody;
 
-  ConstructorData(ir.Member node, ir.FunctionNode functionNode)
-      : super(node, functionNode);
+  ConstructorData(
+      ir.Member node, ir.FunctionNode functionNode, MemberDefinition definition)
+      : super(node, functionNode, definition);
 
   ConstantConstructor getConstructorConstant(
       KernelToElementMapBase elementMap, ConstructorEntity constructor) {
     if (_constantConstructor == null) {
       if (node is ir.Constructor && constructor.isConst) {
         _constantConstructor =
             new Constantifier(elementMap).computeConstantConstructor(node);
       } else {
         failedAt(
             constructor,
             "Unexpected constructor $constructor in "
             "KernelWorldBuilder._getConstructorConstant");
       }
     }
     return _constantConstructor;
   }
 
   @override
   ConstructorData copy() {
-    return new ConstructorData(node, functionNode);
+    return new ConstructorData(node, functionNode, definition);
   }
 }
 
 class FieldData extends MemberData {
   ConstantExpression _constant;
 
-  FieldData(ir.Field node) : super(node);
+  FieldData(ir.Field node, MemberDefinition definition)
+      : super(node, definition);
 
   ir.Field get node => super.node;
 
   ConstantExpression getFieldConstant(
       KernelToElementMapBase elementMap, FieldEntity field) {
     if (_constant == null) {
       if (node.isConst) {
         _constant = new Constantifier(elementMap).visit(node.initializer);
       } else {
         failedAt(
             field,
             "Unexpected field $field in "
             "KernelWorldBuilder._getConstructorConstant");
       }
     }
     return _constant;
   }
 
   @override
   FieldData copy() {
-    return new FieldData(node);
+    return new FieldData(node, definition);
   }
 }