[Payments] Desktop: implement shipping address/option change

chrome/browser/ui/views/payments/payment_request_dialog_view.cc

Index: chrome/browser/ui/views/payments/payment_request_dialog_view.cc
diff --git a/chrome/browser/ui/views/payments/payment_request_dialog_view.cc b/chrome/browser/ui/views/payments/payment_request_dialog_view.cc
index c29aa0efebc47eaea1132d0e98ada0976f084641..778239cff36272394a852279b7f6a881d500a57a 100644
--- a/chrome/browser/ui/views/payments/payment_request_dialog_view.cc
+++ b/chrome/browser/ui/views/payments/payment_request_dialog_view.cc
@@ -54,6 +54,8 @@ PaymentRequestDialogView::PaymentRequestDialogView(
     PaymentRequestDialogView::ObserverForTest* observer)
     : request_(request), observer_for_testing_(observer), being_closed_(false) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
+  if (observer_for_testing_)
+    request->spec()->add_observer_for_testing(this);
   SetLayoutManager(new views::FillLayout());
 
   view_stack_.set_owned_by_client();
@@ -117,6 +119,12 @@ void PaymentRequestDialogView::ShowErrorMessage() {
     observer_for_testing_->OnErrorMessageShown();
 }
 
+void PaymentRequestDialogView::OnSpecUpdated() {
+  // Since this is called in tests only, |observer_for_testing_| is defined.
+  DCHECK(observer_for_testing_);
+  observer_for_testing_->OnSpecDoneUpdating();
+}
+
 void PaymentRequestDialogView::Pay() {
   request_->Pay();
 }