Add billing address as a mandatory field of Payments credit cards.

chrome/browser/ui/views/payments/shipping_address_editor_view_controller.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_PAYMENTS_SHIPPING_ADDRESS_EDITOR_VIEW_CONTROLLER_H_
 #define CHROME_BROWSER_UI_VIEWS_PAYMENTS_SHIPPING_ADDRESS_EDITOR_VIEW_CONTROLLER_H_
 
 #include <memory>
 #include <string>
 #include <vector>
@@ skipping 18 matching lines @@
  public:
   // Does not take ownership of the arguments (except for the |on_edited| and
   // |on_added| callbacks), which should outlive this object. Additionally,
   // |profile| could be nullptr if we are adding a new shipping address. Else,
   // it's a valid pointer to a card that needs to be updated, and which will
   // outlive this controller.
   ShippingAddressEditorViewController(
       PaymentRequestSpec* spec,
       PaymentRequestState* state,
       PaymentRequestDialogView* dialog,
+      BackNavigationType back_navigation_type,
       base::OnceClosure on_edited,
       base::OnceCallback<void(const autofill::AutofillProfile&)> on_added,
       autofill::AutofillProfile* profile);
   ~ShippingAddressEditorViewController() override;
 
   // EditorViewController:
   std::unique_ptr<views::View> CreateHeaderView() override;
+  std::unique_ptr<views::View> CreateCustomFieldsView() override;
   std::vector<EditorField> GetFieldDefinitions() override;
   base::string16 GetInitialValueForType(
       autofill::ServerFieldType type) override;
   bool ValidateModelAndSave() override;
   std::unique_ptr<ValidationDelegate> CreateValidationDelegate(
       const EditorField& field) override;
   std::unique_ptr<ui::ComboboxModel> GetComboboxModelForType(
       const autofill::ServerFieldType& type) override;
   void OnPerformAction(views::Combobox* combobox) override;
   void UpdateEditorView() override;
 
   // PaymentRequestSheetController:
   base::string16 GetSheetTitle() override;
+  std::unique_ptr<views::Button> CreatePrimaryButton() override;
 
  private:
   class ShippingAddressValidationDelegate : public ValidationDelegate {
    public:
     ShippingAddressValidationDelegate(
         ShippingAddressEditorViewController* parent,
         const EditorField& field);
     ~ShippingAddressValidationDelegate() override;
 
     // ValidationDelegate:
@@ skipping 60 matching lines @@
 
   // Failed to fetch the region data in time.
   void RegionDataLoadTimedOut();
 
   DISALLOW_COPY_AND_ASSIGN(ShippingAddressEditorViewController);
 };
 
 }  // namespace payments
 
 #endif  // CHROME_BROWSER_UI_VIEWS_PAYMENTS_SHIPPING_ADDRESS_EDITOR_VIEW_CONTROLLER_H_