[Web Payments] Implement the CVC Unmask dialog.

components/payments/content/payment_request_delegate.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 COMPONENTS_PAYMENTS_CONTENT_PAYMENT_REQUEST_DELEGATE_H_
-#define COMPONENTS_PAYMENTS_CONTENT_PAYMENT_REQUEST_DELEGATE_H_
-
-#include <string>
-
-namespace autofill {
-class PersonalDataManager;
-}
-
-namespace payments {
-
-class PaymentRequest;
-
-class PaymentRequestDelegate {
- public:
-  virtual ~PaymentRequestDelegate() {}
-
-  // Shows the Payment Request dialog for the given |request|.
-  virtual void ShowDialog(PaymentRequest* request) = 0;
-
-  // Closes the same dialog that was opened by this delegate. Must be safe to
-  // call when the dialog is not showing.
-  virtual void CloseDialog() = 0;
-
-  // Disables the dialog and shows an error message that the transaction has
-  // failed.
-  virtual void ShowErrorMessage() = 0;
-
-  // Gets the PersonalDataManager associated with this PaymentRequest flow.
-  // Cannot be null.
-  virtual autofill::PersonalDataManager* GetPersonalDataManager() = 0;
-
-  virtual const std::string& GetApplicationLocale() const = 0;
-
-  // Returns whether the user is in Incognito mode.
-  virtual bool IsIncognito() const = 0;
-};
-
-}  // namespace payments
-
-#endif  // COMPONENTS_PAYMENTS_CONTENT_PAYMENT_REQUEST_DELEGATE_H_