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

pkg/analyzer/test/utils.dart

Index: pkg/analyzer/test/utils.dart
diff --git a/pkg/analyzer/test/utils.dart b/pkg/analyzer/test/utils.dart
index 61697c59d9e4bd0fb3b7024e956be9775ef1a316..3a2e229692c6f1d8e716c7a894b9b4a5db6c5a8e 100644
--- a/pkg/analyzer/test/utils.dart
+++ b/pkg/analyzer/test/utils.dart
@@ -14,6 +14,15 @@ 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.
  */