[element model] migrate for_resolver

Change-Id: I4296355baec375032eb135ef62554192bdeef157
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/405700
Auto-Submit: Phil Quitslund <[email protected]>
Reviewed-by: Konstantin Shcheglov <[email protected]>
Commit-Queue: Konstantin Shcheglov <[email protected]>

Author: pq

pkg/analyzer/lib/src/dart/resolver/for_resolver.dart

@@ -2,11 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-// ignore_for_file: analyzer_use_new_elements
-
 import 'package:_fe_analyzer_shared/src/types/shared_type.dart';
 import 'package:analyzer/dart/ast/token.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/dart/ast/ast.dart';
@@ -110,11 +107,11 @@ class ForResolver {
       return DynamicTypeImpl.instance;
     }
 
-    ClassElement iteratedElement = isAsync
-        ? _resolver.typeProvider.streamElement
-        : _resolver.typeProvider.iterableElement;
+    ClassElement2 iteratedElement = isAsync
+        ? _resolver.typeProvider.streamElement2
+        : _resolver.typeProvider.iterableElement2;
 
-    var iteratedType = iterableType.asInstanceOf(iteratedElement);
+    var iteratedType = iterableType.asInstanceOf2(iteratedElement);
     if (iteratedType == null) {
       return InvalidTypeImpl.instance;
     }
@@ -178,7 +175,7 @@ class ForResolver {
     var elementType = _computeForEachElementType(iterable, isAsync);
     if (loopVariable != null && loopVariable.type == null) {
       var loopVariableElement =
-          loopVariable.declaredElement as LocalVariableElementImpl;
+          loopVariable.declaredFragment?.element as LocalVariableElementImpl2;
       loopVariableElement.type = elementType;
     }