[analysis_server] Migrate Code Actions + Refactor base to new Element model

Change-Id: I6393f60abef6adae34c9f1b9a028662746da0612
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/399960
Reviewed-by: Phil Quitslund <[email protected]>
Commit-Queue: Phil Quitslund <[email protected]>
Reviewed-by: Brian Wilkerson <[email protected]>

Author: DanTup

pkg/analysis_server/analyzer_use_new_elements.txt

@@ -8,8 +8,6 @@ lib/src/handler/legacy/edit_get_available_refactorings.dart
 lib/src/handler/legacy/search_find_element_references.dart
 lib/src/handler/legacy/search_get_type_hierarchy.dart
 lib/src/lsp/completion_utils.dart
-lib/src/lsp/handlers/code_actions/dart.dart
-lib/src/lsp/handlers/commands/abstract_refactor.dart
 lib/src/lsp/handlers/handler_completion.dart
 lib/src/lsp/handlers/handler_completion_resolve.dart
 lib/src/lsp/handlers/handler_definition.dart

pkg/analysis_server/lib/src/lsp/handlers/code_actions/dart.dart

@@ -23,7 +23,6 @@ import 'package:analyzer/dart/analysis/session.dart'
     show InconsistentAnalysisException;
 import 'package:analyzer/dart/element/element2.dart';
 import 'package:analyzer/src/dart/ast/utilities.dart';
-import 'package:analyzer/src/utilities/extensions/element.dart';
 
 /// Produces [CodeAction]s from Dart source commands, fixes, assists and
 /// refactors from the server.
@@ -323,7 +322,7 @@ class DartCodeActionsProducer extends AbstractCodeActionsProducer {
       // Converts/Rewrites
       if (shouldIncludeKind(CodeActionKind.RefactorRewrite)) {
         var node = NodeLocator(offset).searchWithin(unitResult.unit);
-        var element = server.getElementOfNode(node).asElement2;
+        var element = server.getElementOfNode2(node);
 
         // Getter to Method
         if (element is GetterElement &&

pkg/analysis_server/lib/src/lsp/handlers/commands/abstract_refactor.dart

@@ -16,7 +16,6 @@ import 'package:analysis_server/src/services/refactoring/legacy/refactoring.dart
 import 'package:analyzer/dart/analysis/results.dart';
 import 'package:analyzer/dart/element/element2.dart';
 import 'package:analyzer/src/dart/ast/utilities.dart';
-import 'package:analyzer/src/utilities/extensions/element.dart';
 
 final _manager = LspRefactorManager._();
 
@@ -127,7 +126,7 @@ abstract class AbstractRefactorCommandHandler extends SimpleEditCommandHandler
 
       case RefactoringKind.CONVERT_GETTER_TO_METHOD:
         var node = NodeLocator(offset).searchWithin(result.unit);
-        var element = server.getElementOfNode(node).asElement2;
+        var element = server.getElementOfNode2(node);
         if (element is GetterElement) {
           var refactor = ConvertGetterToMethodRefactoring(
             server.refactoringWorkspace,
@@ -143,7 +142,7 @@ abstract class AbstractRefactorCommandHandler extends SimpleEditCommandHandler
 
       case RefactoringKind.CONVERT_METHOD_TO_GETTER:
         var node = NodeLocator(offset).searchWithin(result.unit);
-        var element = server.getElementOfNode(node).asElement2;
+        var element = server.getElementOfNode2(node);
         if (element is ExecutableElement2) {
           var refactor = ConvertMethodToGetterRefactoring(
             server.refactoringWorkspace,