Make elements/names.dart its own library

pkg/compiler/lib/src/resolution/access_semantics.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.
 
 /**
  * Code for classifying the semantics of identifiers appearing in a Dart file.
  */
 library dart2js.access_semantics;
 
 import '../constants/expressions.dart';
 import '../elements/resolution_types.dart';
 import '../elements/elements.dart';
+import '../elements/names.dart';
 
 /// Enum representing the different kinds of destinations which a property
 /// access or method or function invocation might refer to.
 enum AccessKind {
   /// The destination of the conditional access is an instance method, property,
   /// or field of a class, and thus must be determined dynamically.
   CONDITIONAL_DYNAMIC_PROPERTY,
 
   /// The destination of the access is an instance method, property, or field
   /// of a class, and thus must be determined dynamically.
@@ skipping 453 matching lines @@
   /// The invoked constructor.
   final Element element;
 
   /// The type on which the constructor is invoked.
   final ResolutionDartType type;
 
   ConstructorAccessSemantics(this.kind, this.element, this.type);
 
   String toString() => 'ConstructorAccessSemantics($kind, $element, $type)';
 }