[Payments] Normalize billing address for response on Desktop.

components/payments/content/payment_response_helper.h

Index: components/payments/content/payment_response_helper.h
diff --git a/components/payments/content/payment_response_helper.h b/components/payments/content/payment_response_helper.h
index fde039d74482f36e8249521581b622815f006a8d..83a66aa6ab2cc729c2044ff6e3540c9630375161 100644
--- a/components/payments/content/payment_response_helper.h
+++ b/components/payments/content/payment_response_helper.h
@@ -20,7 +20,7 @@ class PaymentRequestSpec;
 // before adding them to the PaymentResponse.
 // A helper class to facilitate the creation of the PaymentResponse.
 class PaymentResponseHelper : public PaymentInstrument::Delegate,
-                              AddressNormalizer::Delegate {
+                              public AddressNormalizer::Delegate {
  public:
   class Delegate {
    public: