Add ConstructorBodyEntity

pkg/compiler/lib/src/kernel/kelements.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.
 
 /// Entity model for elements derived from Kernel IR.
 
 import '../elements/entities.dart';
 import '../elements/names.dart';
 import '../elements/types.dart';
 import 'elements.dart';
@@ skipping 146 matching lines @@
       : super(memberIndex, enclosingClass, name, parameterStructure,
             isExternal: isExternal, isConst: isConst);
 
   @override
   bool get isFactoryConstructor => true;
 
   @override
   bool get isGenerativeConstructor => false;
 }
 
+class KConstructorBody extends KFunction implements ConstructorBodyEntity {
+  final ConstructorEntity constructor;
+
+  KConstructorBody(int memberIndex, this.constructor)
+      : super(
+            memberIndex,
+            constructor.library,
+            constructor.enclosingClass,
+            constructor.memberName,
+            constructor.parameterStructure,
+            AsyncMarker.SYNC,
+            isStatic: false,
+            isExternal: false);
+
+  @override
+  bool get isFunction => true;
+
+  String get _kind => 'constructor_body';
+}
+
 class KMethod extends KFunction {
   final bool isAbstract;
 
   KMethod(int memberIndex, KLibrary library, KClass enclosingClass, Name name,
       ParameterStructure parameterStructure, AsyncMarker asyncMarker,
       {bool isStatic, bool isExternal, this.isAbstract})
       : super(memberIndex, library, enclosingClass, name, parameterStructure,
             asyncMarker,
             isStatic: isStatic, isExternal: isExternal);
 
@@ skipping 67 matching lines @@
   final MemberEntity memberContext;
   final Entity executableContext;
   final FunctionType functionType;
 
   KLocalFunction(
       this.name, this.memberContext, this.executableContext, this.functionType);
 
   String toString() =>
       '${kElementPrefix}local_function(${memberContext.name}.${name ?? '<anonymous>'})';
 }