[Web Payments] Implement the CVC Unmask dialog.

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

 // Copyright 2016 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_PAYMENT_REQUEST_DIALOG_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_PAYMENTS_PAYMENT_REQUEST_DIALOG_VIEW_H_
 
 #include <map>
 #include <memory>
 
@@ skipping 50 matching lines @@
   ~PaymentRequestDialogView() override;
 
   // views::WidgetDelegate
   ui::ModalType GetModalType() const override;
 
   // views::DialogDelegate
   bool Cancel() override;
   bool ShouldShowCloseButton() const override;
   int GetDialogButtons() const override;
 
-  // payments::PaymentRequestDialog
+  // PaymentRequestDialog
   void ShowDialog() override;
   void CloseDialog() override;
   void ShowErrorMessage() override;
 
   void Pay();
   void GoBack();
   void ShowContactProfileSheet();
   void ShowOrderSummary();
   void ShowShippingProfileSheet();
   void ShowPaymentMethodSheet();
   void ShowShippingOptionSheet();
   void ShowCreditCardEditor();
   void ShowShippingAddressEditor();
   void EditorViewUpdated();
 
+  void ShowCvcUnmaskPrompt(
+      const autofill::CreditCard& credit_card,
+      base::WeakPtr<autofill::payments::FullCardRequest::ResultDelegate>
+          result_delegate) override;
+
   ViewStack* view_stack_for_testing() { return &view_stack_; }
 
  private:
   void ShowInitialPaymentSheet();
 
   // views::View
   gfx::Size GetPreferredSize() const override;
   void ViewHierarchyChanged(
       const ViewHierarchyChangedDetails& details) override;
 
@@ skipping 11 matching lines @@
   // Used when the dialog is being closed to avoid re-entrancy into the
   // controller_map_.
   bool being_closed_;
 
   DISALLOW_COPY_AND_ASSIGN(PaymentRequestDialogView);
 };
 
 }  // namespace payments
 
 #endif  // CHROME_BROWSER_UI_VIEWS_PAYMENTS_PAYMENT_REQUEST_DIALOG_VIEW_H_