Stop depending on LabelElement(s) to be reported in visitChildren().

pkg/analyzer/test/utils.dart

 // Copyright (c) 2013, 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.test.utils;
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/standard_resolution_map.dart';
 import 'package:analyzer/dart/ast/visitor.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/dart/element/type.dart';
 import 'package:analyzer/src/generated/resolver.dart' show TypeProvider;
 import 'package:front_end/src/base/source.dart';
 import 'package:test/test.dart';
 
 /**
+ * Search the [unit] for the [Element]s with the given [name].
+ */
+List<Element> findElementsByName(CompilationUnit unit, String name) {
+  var finder = new _ElementsByNameFinder(name);
+  unit.accept(finder);
+  return finder.elements;
+}
+
+/**
  * Search the [unit] for the [LocalVariableElement] with the given [name].
  * Fail if there is not exactly one such variable.
  */
 LocalVariableElement findLocalVariable(CompilationUnit unit, String name) {
   var finder = new _ElementsByNameFinder(name);
   unit.accept(finder);
   List<Element> localVariables =
       finder.elements.where((e) => e is LocalVariableElement).toList();
   expect(localVariables, hasLength(1));
   return localVariables[0];
@@ skipping 304 matching lines @@
 
   _ElementsByNameFinder(this.name);
 
   @override
   visitSimpleIdentifier(SimpleIdentifier node) {
     if (node.name == name && node.inDeclarationContext()) {
       elements.add(node.staticElement);
     }
   }
 }