[Web Payments] Implement the CVC Unmask dialog.

components/payments/content/payment_request.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 COMPONENTS_PAYMENTS_CONTENT_PAYMENT_REQUEST_H_
 #define COMPONENTS_PAYMENTS_CONTENT_PAYMENT_REQUEST_H_
 
 #include <memory>
 #include <vector>
 
@@ skipping 47 matching lines @@
   void UpdateWith(mojom::PaymentDetailsPtr details) override {}
   void Abort() override;
   void Complete(mojom::PaymentComplete result) override;
   void CanMakePayment() override;
 
   // PaymentRequestSpec::Observer:
   void OnInvalidSpecProvided() override;
 
   // PaymentRequestState::Delegate:
   void OnPaymentResponseAvailable(mojom::PaymentResponsePtr response) override;
+  PaymentRequestDelegate* GetPaymentRequestDelegate() override;
 
   // Called when the user explicitely cancelled the flow. Will send a message
   // to the renderer which will indirectly destroy this object (through
   // OnConnectionTerminated).
   void UserCancelled();
 
   // As a result of a browser-side error or renderer-initiated mojo channel
   // closure (e.g. there was an error on the renderer side, or payment was
   // successful), this method is called. It is responsible for cleaning up,
   // such as possibly closing the dialog.
@@ skipping 20 matching lines @@
 
   // May be null, must outlive this object.
   ObserverForTest* observer_for_testing_;
 
   DISALLOW_COPY_AND_ASSIGN(PaymentRequest);
 };
 
 }  // namespace payments
 
 #endif  // COMPONENTS_PAYMENTS_CONTENT_PAYMENT_REQUEST_H_