[Payments] After adding/editing a credit card, instrument is selected.

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

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/views/payments/shipping_option_view_controller.h"
 
 #include "chrome/browser/ui/views/payments/payment_request_dialog_view.h"
 #include "chrome/browser/ui/views/payments/payment_request_views_util.h"
 #include "components/payments/content/payment_request_spec.h"
 #include "components/payments/content/payment_request_state.h"
@@ skipping 48 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(ShippingOptionItem);
 };
 
 }  // namespace
 
 ShippingOptionViewController::ShippingOptionViewController(
     PaymentRequestSpec* spec,
     PaymentRequestState* state,
     PaymentRequestDialogView* dialog)
     : PaymentRequestSheetController(spec, state, dialog) {
+  spec->AddObserver(this);
   for (const auto& option : spec->details().shipping_options) {
     shipping_option_list_.AddItem(base::MakeUnique<ShippingOptionItem>(
         option.get(), spec, state, &shipping_option_list_, dialog,
         option.get() == spec->selected_shipping_option()));
   }
 }
 
-ShippingOptionViewController::~ShippingOptionViewController() {}
+ShippingOptionViewController::~ShippingOptionViewController() {
+  spec()->RemoveObserver(this);
+}
 
 void ShippingOptionViewController::OnSpecUpdated() {
   UpdateContentView();
 }
 
 base::string16 ShippingOptionViewController::GetSheetTitle() {
   return GetShippingOptionSectionString(spec()->shipping_type());
 }
 
 void ShippingOptionViewController::FillContentView(views::View* content_view) {
   content_view->SetLayoutManager(new views::FillLayout);
   content_view->AddChildView(shipping_option_list_.CreateListView().release());
 }
 
 std::unique_ptr<views::View>
 ShippingOptionViewController::CreateExtraFooterView() {
   return nullptr;
 }
 
 }  // namespace payments