Validate that (actual) resynthesized elements have the same runtimeType as originals.

pkg/analyzer/test/src/summary/summary_common.dart

Index: pkg/analyzer/test/src/summary/summary_common.dart
diff --git a/pkg/analyzer/test/src/summary/summary_common.dart b/pkg/analyzer/test/src/summary/summary_common.dart
index fbac15476ceb2d2bcd328b679dabff26433d667a..f72111488262a9da52cdca6cd22f9d323d6c0df7 100644
--- a/pkg/analyzer/test/src/summary/summary_common.dart
+++ b/pkg/analyzer/test/src/summary/summary_common.dart
@@ -4767,6 +4767,15 @@ class C {
     UnlinkedVariable variable =
         serializeClassText('class C { static int i; }').fields[0];
     expect(variable.isStatic, isTrue);
+    expect(variable.constExpr, isNull);
+  }
+
+  test_field_static_final() {
+    UnlinkedVariable variable =
+        serializeClassText('class C { static final int i = 0; }').fields[0];
+    expect(variable.isStatic, isTrue);
+    expect(variable.isFinal, isTrue);
+    expect(variable.constExpr, isNull);
   }
 
   test_fully_linked_references_follow_other_references() {