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

chrome/browser/ui/views/payments/contact_info_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_CONTACT_INFO_EDITOR_VIEW_CONTROLLER_H_
 #define CHROME_BROWSER_UI_VIEWS_PAYMENTS_CONTACT_INFO_EDITOR_VIEW_CONTROLLER_H_
 
 #include <memory>
 #include <string>
 #include <vector>
@@ skipping 10 matching lines @@
 namespace payments {
 
 class ContactInfoEditorViewController : public EditorViewController {
  public:
   // Does not take ownership of the arguments, which should outlive this object.
   // Passing nullptr as |profile| indicates that we are editing a new profile;
   // other arguments should never be null.
   ContactInfoEditorViewController(PaymentRequestSpec* spec,
                                   PaymentRequestState* state,
                                   PaymentRequestDialogView* dialog,
+                                  BackNavigationType back_navigation_type,
                                   autofill::AutofillProfile* profile);
   ~ContactInfoEditorViewController() override;
 
   // EditorViewController:
   std::unique_ptr<views::View> CreateHeaderView() override;
+  std::unique_ptr<views::View> CreateCustomFieldView(
+      autofill::ServerFieldType type) 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;
 
  protected:
@@ skipping 26 matching lines @@
     EditorField field_;
     // Outlives this class. Never null.
     EditorViewController* controller_;
     const std::string& locale_;
   };
 };
 
 }  // namespace payments
 
 #endif  // CHROME_BROWSER_UI_VIEWS_PAYMENTS_CONTACT_INFO_EDITOR_VIEW_CONTROLLER_H_