Resynthesize constructor initializers from Kernel.

pkg/front_end/lib/src/fasta/kernel/fasta_accessors.dart

 // Copyright (c) 2016, 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 fasta.fasta_accessors;
 
 import 'package:kernel/ast.dart'
     hide InvalidExpression, InvalidInitializer, InvalidStatement;
 
 import '../../scanner/token.dart' show Token;
@@ skipping 70 matching lines @@
 
   finishSend(Object receiver, Arguments arguments, int offset);
 
   Expression buildCompileTimeError(Message message, int charOffset);
 
   Expression deprecated_buildCompileTimeError(String error, [int offset]);
 
   Initializer buildInvalidInitializer(Expression expression, [int offset]);
 
   Initializer buildFieldInitializer(
-      String name, int offset, Expression expression);
+      bool isSynthetic, String name, int offset, Expression expression);
 
   Initializer buildSuperInitializer(
-      Constructor constructor, Arguments arguments,
+      bool isSynthetic, Constructor constructor, Arguments arguments,
       [int offset]);
 
   Initializer buildRedirectingInitializer(
       Constructor constructor, Arguments arguments,
       [int charOffset = -1]);
 
   Expression buildStaticInvocation(Procedure target, Arguments arguments);
 
   Expression buildProblemExpression(ProblemBuilder builder, int offset);
 
@@ skipping 284 matching lines @@
     Constructor constructor = helper.lookupConstructor(name, isSuper: isSuper);
     if (constructor == null ||
         !helper.checkArguments(
             constructor.function, arguments, <TypeParameter>[])) {
       return helper.buildInvalidInitializer(
           buildThrowNoSuchMethodError(
               new NullLiteral()..fileOffset = offset, arguments,
               isSuper: isSuper, name: name.name, offset: offset),
           offset);
     } else if (isSuper) {
-      return helper.buildSuperInitializer(constructor, arguments, offset);
+      return helper.buildSuperInitializer(
+          false, constructor, arguments, offset);
     } else {
       return helper.buildRedirectingInitializer(constructor, arguments, offset);
     }
   }
 
   Expression buildAssignment(Expression value, {bool voidContext: false}) {
     return buildAssignmentError();
   }
 
   Expression buildNullAwareAssignment(
@@ skipping 646 matching lines @@
     offset ??= offsetForToken(this.token);
     return helper.throwNoSuchMethodError(new NullLiteral()..fileOffset = offset,
         plainNameForRead, arguments, offset,
         isGetter: isGetter, isSetter: isSetter);
   }
 }
 
 bool isFieldOrGetter(Member member) {
   return member is Field || (member is Procedure && member.isGetter);
 }