[Payments] Have expiration date be on the same line in CC editor

chrome/browser/ui/views/payments/credit_card_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_CREDIT_CARD_EDITOR_VIEW_CONTROLLER_H_
 #define CHROME_BROWSER_UI_VIEWS_PAYMENTS_CREDIT_CARD_EDITOR_VIEW_CONTROLLER_H_
 
 #include <memory>
 #include <set>
 #include <string>
@@ skipping 30 matching lines @@
       PaymentRequestDialogView* dialog,
       BackNavigationType back_navigation,
       int next_ui_tag,
       base::OnceClosure on_edited,
       base::OnceCallback<void(const autofill::CreditCard&)> on_added,
       autofill::CreditCard* credit_card);
   ~CreditCardEditorViewController() override;
 
   // EditorViewController:
   std::unique_ptr<views::View> CreateHeaderView() override;
+  std::unique_ptr<views::View> CreateCustomFieldView(
+      autofill::ServerFieldType type,
+      views::View** focusable_field,
+      bool* valid) override;
   std::unique_ptr<views::View> CreateExtraViewForField(
       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;
@@ skipping 58 matching lines @@
 
   // The value to use for the add billing address button tag.
   int add_billing_address_button_tag_;
 
   DISALLOW_COPY_AND_ASSIGN(CreditCardEditorViewController);
 };
 
 }  // namespace payments
 
 #endif  // CHROME_BROWSER_UI_VIEWS_PAYMENTS_CREDIT_CARD_EDITOR_VIEW_CONTROLLER_H_