Add ConstructorBodyEntity

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 365 matching lines @@
   }
 
   @override
   FunctionData copy() {
     return new FunctionData(node, functionNode);
   }
 }
 
 class ConstructorData extends FunctionData {
   ConstantConstructor _constantConstructor;
+  ConstructorBodyEntity constructorBody;
 
   ConstructorData(ir.Member node, ir.FunctionNode functionNode)
       : super(node, functionNode);
 
   ConstantConstructor getConstructorConstant(
       KernelToElementMapBase elementMap, ConstructorEntity constructor) {
     if (_constantConstructor == null) {
       if (node is ir.Constructor && constructor.isConst) {
         _constantConstructor =
             new Constantifier(elementMap).computeConstantConstructor(node);
@@ skipping 33 matching lines @@
       }
     }
     return _constant;
   }
 
   @override
   FieldData copy() {
     return new FieldData(node);
   }
 }