Stop using ExecutableElement.localVariables in RenameClassMemberRefactoringImpl.

pkg/analysis_server/test/services/refactoring/rename_class_member_test.dart

Index: pkg/analysis_server/test/services/refactoring/rename_class_member_test.dart
diff --git a/pkg/analysis_server/test/services/refactoring/rename_class_member_test.dart b/pkg/analysis_server/test/services/refactoring/rename_class_member_test.dart
index 74828b854bf209b3adc52a36b3b4e5b1f3b310f0..22a4657bf2a84ae3985bb518e66ef7b74a1ed8c2 100644
--- a/pkg/analysis_server/test/services/refactoring/rename_class_member_test.dart
+++ b/pkg/analysis_server/test/services/refactoring/rename_class_member_test.dart
@@ -150,7 +150,6 @@ main(A a) {
         expectedMessage: "Renamed method will be invisible in 'my.lib'.");
   }
 
-  @failingTest
   test_checkFinalConditions_shadowed_byLocalFunction_inSameClass() async {
     await indexTestUnit('''
 class A {
@@ -171,7 +170,6 @@ class A {
         expectedContextSearch: 'test(); // marker');
   }
 
-  @failingTest
   test_checkFinalConditions_shadowed_byLocalVariable_inSameClass() async {
     await indexTestUnit('''
 class A {
@@ -192,7 +190,6 @@ class A {
         expectedContextSearch: 'test(); // marker');
   }
 
-  @failingTest
   test_checkFinalConditions_shadowed_byLocalVariable_inSubClass() async {
     await indexTestUnit('''
 class A {