Move resolution/operators.dart to elements/operators.dart

pkg/compiler/lib/src/elements/operators.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.
 
 library dart2js.operators;
 
-import '../elements/elements.dart';
+import 'elements.dart' show PublicName;
 import '../universe/call_structure.dart' show CallStructure;
 import '../universe/selector.dart' show Selector, SelectorKind;
 
 enum UnaryOperatorKind {
   NOT,
   NEGATE,
   COMPLEMENT,
 }
 
 class UnaryOperator {
@@ skipping 484 matching lines @@
   // ignore: MISSING_RETURN
   static IncDecOperator fromKind(IncDecOperatorKind kind) {
     switch (kind) {
       case IncDecOperatorKind.INC:
         return INC;
       case IncDecOperatorKind.DEC:
         return DEC;
     }
   }
 }