Issue 55011. Fix GeneralizingAstVisitor.visitNamedType() to invoke visitTypeAnnotation().

Bug: #55011
Change-Id: I1bcd12afdc8cf9645aaca6b11baf9b738750414b
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/354440
Reviewed-by: Brian Wilkerson <[email protected]>
Commit-Queue: Konstantin Shcheglov <[email protected]>
Reviewed-by: Samuel Rawlins <[email protected]>

Author: scheglov

pkg/analyzer/CHANGELOG.md

@@ -4,6 +4,7 @@
 * Deprecated `LibraryElement.isNonNullableByDefault`.
 * Deprecated `InterfaceElement.lookUpGetter`, `InterfaceElement.lookUpMethod`,
   and `InterfaceElement.lookUpSetter`.
+* Fixed `GeneralizingAstVisitor.visitNamedType` to invoke `visitTypeAnnotation`.
 
 ## 6.4.1
 * Patch for crash in ffi_verifier.

pkg/analyzer/lib/dart/ast/visitor.dart

@@ -519,7 +519,7 @@ class GeneralizingAstVisitor<R> implements AstVisitor<R> {
   R? visitNamedExpression(NamedExpression node) => visitExpression(node);
 
   @override
-  R? visitNamedType(NamedType node) => visitNode(node);
+  R? visitNamedType(NamedType node) => visitTypeAnnotation(node);
 
   R? visitNamespaceDirective(NamespaceDirective node) =>
       visitUriBasedDirective(node);