Fix and mark a class as deprecated

pkg/analyzer/lib/src/dart/ast/utilities.dart

 // Copyright (c) 2014, 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 analyzer.src.dart.ast.utilities;
 
 import 'dart:collection';
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/token.dart';
@@ skipping 2570 matching lines @@
   @override
   Element visitVariableDeclaration(VariableDeclaration node) => node.element;
 }
 
 /**
  * An object that will clone any AST structure that it visits. The cloner will
  * clone the structure, replacing the specified ASTNode with a new ASTNode,
  * mapping the old token stream to a new token stream, and preserving resolution
  * results.
  */
+@deprecated
 class IncrementalAstCloner implements AstVisitor<AstNode> {
   /**
    * The node to be replaced during the cloning process.
    */
   final AstNode _oldNode;
 
   /**
    * The replacement node used during the cloning process.
    */
   final AstNode _newNode;
@@ skipping 493 matching lines @@
       _cloneNode(node.thenStatement),
       _mapToken(node.elseKeyword),
       _cloneNode(node.elseStatement));
 
   @override
   ImplementsClause visitImplementsClause(ImplementsClause node) =>
       new ImplementsClause(
           _mapToken(node.implementsKeyword), _cloneNodeList(node.interfaces));
 
   @override
-  ImportDirective visitImportDirective(ImportDirective node) =>
-      new ImportDirective(
-          _cloneNode(node.documentationComment),
-          _cloneNodeList(node.metadata),
-          _mapToken(node.keyword),
-          _cloneNode(node.uri),
-          _cloneNodeList(node.configurations),
-          _mapToken(node.deferredKeyword),
-          _mapToken(node.asKeyword),
-          _cloneNode(node.prefix),
-          _cloneNodeList(node.combinators),
-          _mapToken(node.semicolon));
+  ImportDirective visitImportDirective(ImportDirective node) {
+    ImportDirective copy = new ImportDirective(
+        _cloneNode(node.documentationComment),
+        _cloneNodeList(node.metadata),
+        _mapToken(node.keyword),
+        _cloneNode(node.uri),
+        _cloneNodeList(node.configurations),
+        _mapToken(node.deferredKeyword),
+        _mapToken(node.asKeyword),
+        _cloneNode(node.prefix),
+        _cloneNodeList(node.combinators),
+        _mapToken(node.semicolon));
+    copy.element = node.element;
+    return copy;
+  }
 
   @override
   IndexExpression visitIndexExpression(IndexExpression node) {
     Token period = _mapToken(node.period);
     IndexExpression copy;
     if (period == null) {
       copy = new IndexExpression.forTarget(
           _cloneNode(node.target),
           _mapToken(node.leftBracket),
           _cloneNode(node.index),
@@ skipping 57 matching lines @@
   @override
   Label visitLabel(Label node) =>
       new Label(_cloneNode(node.label), _mapToken(node.colon));
 
   @override
   LabeledStatement visitLabeledStatement(LabeledStatement node) =>
       new LabeledStatement(
           _cloneNodeList(node.labels), _cloneNode(node.statement));
 
   @override
-  LibraryDirective visitLibraryDirective(LibraryDirective node) =>
-      new LibraryDirective(
-          _cloneNode(node.documentationComment),
-          _cloneNodeList(node.metadata),
-          _mapToken(node.libraryKeyword),
-          _cloneNode(node.name),
-          _mapToken(node.semicolon));
+  LibraryDirective visitLibraryDirective(LibraryDirective node) {
+    LibraryDirective copy = new LibraryDirective(
+        _cloneNode(node.documentationComment),
+        _cloneNodeList(node.metadata),
+        _mapToken(node.libraryKeyword),
+        _cloneNode(node.name),
+        _mapToken(node.semicolon));
+    copy.element = node.element;
+    return copy;
+  }
 
   @override
   LibraryIdentifier visitLibraryIdentifier(LibraryIdentifier node) {
     LibraryIdentifier copy =
         new LibraryIdentifier(_cloneNodeList(node.components));
     copy.propagatedType = node.propagatedType;
     copy.staticType = node.staticType;
     return copy;
   }
 
@@ skipping 4565 matching lines @@
    * Safely visit the given [token], printing the [suffix] after the token if it
    * is non-`null`.
    */
   void _visitTokenWithSuffix(Token token, String suffix) {
     if (token != null) {
       _writer.print(token.lexeme);
       _writer.print(suffix);
     }
   }
 }