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

pkg/compiler/lib/src/kernel/error.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.md file.
 
 import 'package:kernel/ast.dart' as ir;
 
+import "../elements/elements.dart" show Element, ErroneousElement;
+import "../elements/operators.dart"
+    show AssignmentOperator, BinaryOperator, IncDecOperator, UnaryOperator;
 import "../elements/resolution_types.dart" show ResolutionDartType;
-import "../elements/elements.dart" show Element, ErroneousElement;
-import "../resolution/operators.dart"
-    show AssignmentOperator, BinaryOperator, IncDecOperator, UnaryOperator;
 import "../tree/tree.dart"
     show Expression, NewExpression, Node, NodeList, Operator, Send, SendSet;
 import "../universe/call_structure.dart" show CallStructure;
 import "../universe/selector.dart" show Selector;
 
 abstract class KernelError {
   // TODO(ahe): Get rid of this method, each error should be handled according
   // to the semantics required by the Dart Language Specification.
   ir.Expression handleError(Expression node);
 
@@ skipping 109 matching lines @@
   ir.Expression errorUnresolvedThisConstructorInvoke(
       Send node, Element element, NodeList arguments, Selector selector, _) {
     return handleError(node);
   }
 
   ir.Expression errorInvalidIndexSetIfNull(
       SendSet node, ErroneousElement error, Node index, Node rhs, _) {
     return handleError(node);
   }
 }