Stop depending of visiting LocalVariableElement(s) in Executableelement.visitChildren().

pkg/analysis_server/test/services/correction/name_suggestion_test.dart

Index: pkg/analysis_server/test/services/correction/name_suggestion_test.dart
diff --git a/pkg/analysis_server/test/services/correction/name_suggestion_test.dart b/pkg/analysis_server/test/services/correction/name_suggestion_test.dart
index 80a32c99da4a0ed929474b5e7282127f2b2cadf0..d352a5ba29da666c9ec5f68a6408e7a8f6744019 100644
--- a/pkg/analysis_server/test/services/correction/name_suggestion_test.dart
+++ b/pkg/analysis_server/test/services/correction/name_suggestion_test.dart
@@ -4,7 +4,6 @@
 
 import 'package:analysis_server/src/services/correction/name_suggestion.dart';
 import 'package:analyzer/dart/ast/ast.dart';
-import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/dart/element/type.dart';
 import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
@@ -40,7 +39,7 @@ main() {
 }
 ''');
     Set<String> excluded = new Set<String>.from([]);
-    DartType expectedType = (findElement('node') as LocalVariableElement).type;
+    DartType expectedType = findLocalVariable('node').type;
     Expression assignedExpression =
         findNodeAtString('null;', (node) => node is NullLiteral);
     List<String> suggestions = getVariableNameSuggestionsForExpression(
@@ -54,7 +53,7 @@ main() {
   double res = 0.0;
 }
 ''');
-    DartType expectedType = (findElement('res') as LocalVariableElement).type;
+    DartType expectedType = findLocalVariable('res').type;
     Expression assignedExpression = findNodeAtString('0.0;');
     // first choice for "double" is "d"
     expect(
@@ -74,7 +73,7 @@ main() {
   int res = 0;
 }
 ''');
-    DartType expectedType = (findElement('res') as LocalVariableElement).type;
+    DartType expectedType = findLocalVariable('res').type;
     Expression assignedExpression = findNodeAtString('0;');
     // first choice for "int" is "i"
     expect(
@@ -94,7 +93,7 @@ main() {
   String res = 'abc';
 }
 ''');
-    DartType expectedType = (findElement('res') as LocalVariableElement).type;
+    DartType expectedType = findLocalVariable('res').type;
     Expression assignedExpression = findNodeAtString("'abc';");
     // first choice for "String" is "s"
     expect(