Elements. Migrate FlutterOutlineComputer.

Change-Id: I377de846b5400cbd8525dc41f52909a3a1734dc2
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/391240
Reviewed-by: Brian Wilkerson <[email protected]>
Commit-Queue: Konstantin Shcheglov <[email protected]>

Author: scheglov

pkg/analysis_server/analyzer_use_new_elements.txt

@@ -47,6 +47,7 @@ lib/src/domains/analysis/occurrences.dart
 lib/src/domains/completion/available_suggestions.dart
 lib/src/domains/execution/completion.dart
 lib/src/flutter/flutter_notifications.dart
+lib/src/flutter/flutter_outline_computer.dart
 lib/src/g3/fixes.dart
 lib/src/g3/utilities.dart
 lib/src/handler/legacy/analysis_get_errors.dart
@@ -1499,14 +1500,14 @@ tool/code_completion/benchmark/flutter.dart
 tool/code_completion/benchmark/sliding_statistics.dart
 tool/code_completion/code_metrics.dart
 tool/code_completion/completion_at.dart
+tool/code_completion/completion_metrics.dart
 tool/code_completion/completion_metrics_base.dart
 tool/code_completion/completion_metrics_client.dart
 tool/code_completion/corpus.dart
+tool/code_completion/flutter_metrics.dart
 tool/code_completion/implicit_type_declarations.dart
 tool/code_completion/metrics_util.dart
 tool/code_completion/output_utilities.dart
-tool/code_completion/completion_metrics.dart
-tool/code_completion/flutter_metrics.dart
 tool/code_completion/relevance_metrics.dart
 tool/code_completion/relevance_table_generator.dart
 tool/code_completion/visitors.dart

pkg/analysis_server/lib/src/flutter/flutter_outline_computer.dart

@@ -7,7 +7,7 @@ import 'package:analysis_server/src/protocol_server.dart' as protocol;
 import 'package:analyzer/dart/analysis/results.dart';
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/visitor.dart';
-import 'package:analyzer/dart/element/element.dart';
+import 'package:analyzer/dart/element/element2.dart';
 import 'package:analyzer/dart/element/type.dart';
 import 'package:analyzer/src/utilities/extensions/flutter.dart';
 
@@ -49,7 +49,7 @@ class FlutterOutlineComputer {
   /// If the given [argument] for the [parameter] can be represented as a
   /// Flutter attribute, add it to the [attributes].
   void _addAttribute(List<protocol.FlutterOutlineAttribute> attributes,
-      Expression argument, ParameterElement? parameter) {
+      Expression argument, FormalParameterElement? parameter) {
     if (parameter == null) {
       return;
     }
@@ -132,7 +132,7 @@ class FlutterOutlineComputer {
     if (type is! InterfaceType || !type.isWidgetType) {
       return null;
     }
-    var className = type.element.displayName;
+    var className = type.element3.displayName;
 
     if (node is InstanceCreationExpression) {
       var attributes = <protocol.FlutterOutlineAttribute>[];
@@ -195,7 +195,7 @@ class FlutterOutlineComputer {
           if (visitor.outlines.isNotEmpty) {
             children.addAll(visitor.outlines);
           } else {
-            var parameter = argument.staticParameterElement;
+            var parameter = argument.correspondingParameter;
             _addAttribute(attributes, argument, parameter);
           }
         }