Revert "Update third_party/pkg/kernel version"

pkg/compiler/lib/src/ssa/kernel_ast_adapter.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.
 
 import 'package:js_runtime/shared/embedded_names.dart';
 import 'package:kernel/ast.dart' as ir;
 
 import '../constants/expressions.dart';
 import '../common.dart';
 import '../common/names.dart';
@@ skipping 631 matching lines @@
   @override
   DartType visitFunctionType(ir.FunctionType node) {
     return new FunctionType.synthesized(
         visitType(node.returnType),
         visitTypes(node.positionalParameters
             .take(node.requiredParameterCount)
             .toList()),
         visitTypes(node.positionalParameters
             .skip(node.requiredParameterCount)
             .toList()),
-        node.namedParameters.map((n) => n.name).toList(),
-        node.namedParameters.map((n) => visitType(n.type)).toList());
+        node.namedParameters.keys.toList(),
+        visitTypes(node.namedParameters.values.toList()));
   }
 
   @override
   DartType visitInterfaceType(ir.InterfaceType node) {
     ClassElement cls = astAdapter.getElement(node.classNode);
     return new InterfaceType(cls, visitTypes(node.typeArguments));
   }
 
   @override
   DartType visitVoidType(ir.VoidType node) {
@@ skipping 75 matching lines @@
     astAdapter.reporter.internalError(
         CURRENT_ELEMENT_SPANNABLE, "Unexpected constant target: $element.");
     return null;
   }
 
   @override
   ConstantExpression visitStringLiteral(ir.StringLiteral node) {
     return new StringConstantExpression(node.value);
   }
 }