Move dart_types to elements/resolution_types

pkg/compiler/lib/src/serialization/values.dart

 // Copyright (c) 2015, 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.
 
 /// Class hiarchy for semantic wrapping of serializable values.
 
 library dart2js.serialization.values;
 
 import '../constants/expressions.dart';
-import '../dart_types.dart';
+import '../elements/resolution_types.dart';
 import '../elements/elements.dart';
 import 'keys.dart';
 
 /// Intermediate representation of a serializable value.
 ///
 /// Serializable values are
 ///    * [bool],
 ///    * [int],
 ///    * [double],
 ///    * [String],
@@ skipping 148 matching lines @@
   R visitBool(BoolValue value, A arg);
   R visitInt(IntValue value, A arg);
   R visitDouble(DoubleValue value, A arg);
   R visitString(StringValue value, A arg);
   R visitObject(ObjectValue value, A arg);
   R visitMap(MapValue value, A arg);
   R visitList(ListValue value, A arg);
   R visitEnum(EnumValue value, A arg);
   R visitUri(UriValue value, A arg);
 }