Add some corner cases for resynthesis of field formal parameters.

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

Index: pkg/analyzer/test/src/summary/resynthesize_test.dart
diff --git a/pkg/analyzer/test/src/summary/resynthesize_test.dart b/pkg/analyzer/test/src/summary/resynthesize_test.dart
index 4738af2aad49ae8156c90373025ba2473475be73..33dff3b18ca9b2bcea61217af4a5d304b88870e5 100644
--- a/pkg/analyzer/test/src/summary/resynthesize_test.dart
+++ b/pkg/analyzer/test/src/summary/resynthesize_test.dart
@@ -594,6 +594,42 @@ class E {
     checkLibrary('class C { factory C() => null; }');
   }
 
+  test_class_constructor_field_formal_dynamic_dynamic() {
+    checkLibrary('class C { dynamic x; C(dynamic this.x); }');
+  }
+
+  test_class_constructor_field_formal_dynamic_typed() {
+    checkLibrary('class C { dynamic x; C(int this.x); }');
+  }
+
+  test_class_constructor_field_formal_dynamic_untyped() {
+    checkLibrary('class C { dynamic x; C(this.x); }');
+  }
+
+  test_class_constructor_field_formal_typed_dynamic() {
+    checkLibrary('class C { num x; C(dynamic this.x); }');
+  }
+
+  test_class_constructor_field_formal_typed_typed() {
+    checkLibrary('class C { num x; C(int this.x); }');
+  }
+
+  test_class_constructor_field_formal_typed_untyped() {
+    checkLibrary('class C { num x; C(this.x); }');
+  }
+
+  test_class_constructor_field_formal_untyped_dynamic() {
+    checkLibrary('class C { var x; C(dynamic this.x); }');
+  }
+
+  test_class_constructor_field_formal_untyped_typed() {
+    checkLibrary('class C { var x; C(int this.x); }');
+  }
+
+  test_class_constructor_field_formal_untyped_untyped() {
+    checkLibrary('class C { var x; C(this.x); }');
+  }
+
   test_class_constructor_implicit() {
     checkLibrary('class C {}');
   }