Don't resynthesize field types during class members resynthesis.

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

Index: pkg/analyzer/test/src/summary/resynthesize_common.dart
diff --git a/pkg/analyzer/test/src/summary/resynthesize_common.dart b/pkg/analyzer/test/src/summary/resynthesize_common.dart
index c091db90431358a7f0000aa160b4bdb0fd8b1ced..dc853637b0a7ae74c81b58fd6ffedcf6095cfaad 100644
--- a/pkg/analyzer/test/src/summary/resynthesize_common.dart
+++ b/pkg/analyzer/test/src/summary/resynthesize_common.dart
@@ -3900,6 +3900,15 @@ class C {
 ''');
   }
 
+  test_invalid_setterParameter_fieldFormalParameter() {
+    checkLibrary('''
+class C {
+  int foo;
+  void set bar(this.foo) {}
+}
+''');
+  }
+
   test_library() {
     checkLibrary('');
   }