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_browsertest.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 <string>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/time/time.h"
@@ skipping 507 matching lines @@
                           autofill::ADDRESS_HOME_CITY);
   SetEditorTextfieldValue(base::ASCIIToUTF16("BobZip"),
                           autofill::ADDRESS_HOME_ZIP);
   SetEditorTextfieldValue(base::ASCIIToUTF16("5755555555"),
                           autofill::PHONE_HOME_WHOLE_NUMBER);
 
   // Come back to credit card editor.
   ResetEventObserver(DialogEvent::BACK_NAVIGATION);
   ClickOnDialogViewAndWait(DialogViewID::SAVE_ADDRESS_BUTTON);
 
+  // The billing address must be properly selected and valid.
+  views::Combobox* billing_combobox = static_cast<views::Combobox*>(
+      dialog_view()->GetViewByID(autofill::ADDRESS_BILLING_LINE1));
+  ASSERT_NE(nullptr, billing_combobox);
+  EXPECT_FALSE(billing_combobox->invalid());
+
   // And then save credit card state and come back to payment sheet.
   ResetEventObserver(DialogEvent::BACK_TO_PAYMENT_SHEET_NAVIGATION);
 
   // Verifying the data is in the DB.
   autofill::PersonalDataManager* personal_data_manager = GetDataManager();
   personal_data_manager->AddObserver(&personal_data_observer_);
 
   // Wait until the web database has been updated and the notification sent.
   base::RunLoop data_loop;
   EXPECT_CALL(personal_data_observer_, OnPersonalDataChanged())
@@ skipping 52 matching lines @@
                           autofill::CREDIT_CARD_NAME_FULL);
 
   ValidatingTextfield* textfield =
       static_cast<ValidatingTextfield*>(dialog_view()->GetViewByID(
           static_cast<int>(autofill::CREDIT_CARD_NAME_FULL)));
   EXPECT_TRUE(textfield);
   EXPECT_TRUE(textfield->invalid());
 }
 
 }  // namespace payments