Don't resynthesize field types during class members resynthesis.

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 d7a25f35190fe49516009fb11168e80499249837..b8336556d85781ad099ea2cf18728040ff67a830 100644
--- a/pkg/analyzer/test/src/summary/summary_common.dart
+++ b/pkg/analyzer/test/src/summary/summary_common.dart
@@ -9554,6 +9554,17 @@ f(x) => 42;
     _assertParameterZeroVisibleRange(p);
   }
 
+  test_parameter_visibleRange_invalid_fieldFormalParameter() {
+    UnlinkedExecutable m =
+        findExecutable('m', executables: serializeClassText(r'''
+class C {
+  int foo;
+  void m(this.foo) {}
+}
+''').executables);
+    _assertParameterZeroVisibleRange(m.parameters[0]);
+  }
+
   test_parameter_visibleRange_typedef() {
     UnlinkedTypedef type = serializeTypedefText('typedef F(x);');
     _assertParameterZeroVisibleRange(type.parameters[0]);