Properly update the payment request credit card billing combob box when a new address is added.

chrome/browser/ui/views/payments/credit_card_editor_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/credit_card_editor_view_controller.h"
 
 #include <memory>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 354 matching lines @@
   }
 }
 
 void CreditCardEditorViewController::AddAndSelectNewBillingAddress(
     const autofill::AutofillProfile& profile) {
   views::Combobox* address_combobox =
       static_cast<views::Combobox*>(dialog()->GetViewByID(kBillingAddressType));
   autofill::AddressComboboxModel* model =
       static_cast<autofill::AddressComboboxModel*>(address_combobox->model());
   int index = model->AddNewProfile(profile);
-  address_combobox->SetSelectedIndex(index);
-  // Force revalidation.
-  address_combobox->OnBlur();
+  // SetSelectedIndex doesn't trigger a perform action notification, which is
+  // needed to update the valid state.
+  address_combobox->SetSelectedRow(index);
 }
 
 CreditCardEditorViewController::CreditCardValidationDelegate::
     CreditCardValidationDelegate(
         const EditorField& field,
         EditorViewController* controller,
         const std::vector<std::string>& supported_card_networks)
     : field_(field),
       controller_(controller),
       supported_card_networks_(supported_card_networks.begin(),
@@ skipping 41 matching lines @@
   controller_->DisplayErrorMessageForField(field_, displayed_message);
   return is_required_valid;
 }
 
 bool CreditCardEditorViewController::GetSheetId(DialogViewID* sheet_id) {
   *sheet_id = DialogViewID::CREDIT_CARD_EDITOR_SHEET;
   return true;
 }
 
 }  // namespace payments