Make elements/names.dart its own library

pkg/compiler/lib/src/resolution/members.dart

 // Copyright (c) 2012, 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.resolution.members;
 
 import 'package:front_end/src/fasta/scanner.dart' show isUserDefinableOperator;
 
 import '../common.dart';
 import '../common/names.dart' show Selectors;
 import '../common/resolution.dart' show Resolution;
 import '../compile_time_constants.dart';
 import '../constants/constructors.dart'
     show RedirectingFactoryConstantConstructor;
 import '../constants/expressions.dart';
 import '../constants/values.dart';
 import '../common_elements.dart';
 import '../elements/elements.dart';
 import '../elements/modelx.dart'
     show
         ConstructorElementX,
         ErroneousElementX,
         FunctionElementX,
         JumpTargetX,
         LocalFunctionElementX,
         LocalParameterElementX,
         ParameterElementX,
         VariableElementX,
         VariableList;
+import '../elements/names.dart';
 import '../elements/operators.dart';
 import '../elements/resolution_types.dart';
 import '../options.dart';
 import '../tree/tree.dart';
 import '../universe/call_structure.dart' show CallStructure;
 import '../universe/feature.dart' show Feature;
 import '../universe/selector.dart' show Selector;
 import '../universe/use.dart' show DynamicUse, StaticUse, TypeUse;
 import '../util/util.dart' show Link;
 import 'access_semantics.dart';
@@ skipping 4761 matching lines @@
     }
     return const NoneResult();
   }
 }
 
 /// Looks up [name] in [scope] and unwraps the result.
 Element lookupInScope(
     DiagnosticReporter reporter, Node node, Scope scope, String name) {
   return Elements.unwrap(scope.lookup(name), reporter, node);
 }