[Payment Request] Error message screen

ios/chrome/browser/payments/payment_request_coordinator.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 IOS_CHROME_BROWSER_PAYMENTS_PAYMENT_REQUEST_COORDINATOR_H_
 #define IOS_CHROME_BROWSER_PAYMENTS_PAYMENT_REQUEST_COORDINATOR_H_
 
 #import <UIKit/UIKit.h>
 
 #include "components/autofill/core/browser/autofill_manager.h"
 #import "ios/chrome/browser/chrome_coordinator.h"
 #import "ios/chrome/browser/payments/payment_items_display_coordinator.h"
 #import "ios/chrome/browser/payments/payment_method_selection_coordinator.h"
 #include "ios/chrome/browser/payments/payment_request.h"
+#include "ios/chrome/browser/payments/payment_request_error_coordinator.h"
 #import "ios/chrome/browser/payments/payment_request_view_controller.h"
 #import "ios/chrome/browser/payments/shipping_address_selection_coordinator.h"
 #import "ios/chrome/browser/payments/shipping_option_selection_coordinator.h"
 
 namespace ios {
 class ChromeBrowserState;
 }
 
 @class PaymentRequestCoordinator;
 
@@ skipping 16 matching lines @@
 - (void)paymentRequestCoordinator:(PaymentRequestCoordinator*)coordinator
           didSelectShippingOption:(web::PaymentShippingOption)shippingOption;
 
 @end
 
 // Coordinator responsible for creating and presenting the PaymentRequest view
 // controller. The PR view controller will be presented by the view controller
 // provided in the initializer.
 @interface PaymentRequestCoordinator
     : ChromeCoordinator<PaymentRequestViewControllerDelegate,
+                        PaymentRequestErrorCoordinatorDelegate,
                         PaymentItemsDisplayCoordinatorDelegate,
                         PaymentMethodSelectionCoordinatorDelegate,
                         ShippingAddressSelectionCoordinatorDelegate,
                         ShippingOptionSelectionCoordinatorDelegate>
 
 // Creates a Payment Request coordinator that will present UI on
 // |viewController| using data available from |personalDataManager|.
 - (instancetype)initWithBaseViewController:(UIViewController*)viewController
     NS_DESIGNATED_INITIALIZER;
 
@@ skipping 21 matching lines @@
 // The host of the page invoking the Payment Request API. Should be set before
 // calling |start|.
 @property(nonatomic, copy) NSString* pageHost;
 
 // The delegate to be notified when the user confirms or cancels the request.
 @property(nonatomic, weak) id<PaymentRequestCoordinatorDelegate> delegate;
 
 // Updates the payment details of the PaymentRequest and updates the UI.
 - (void)updatePaymentDetails:(web::PaymentDetails)paymentDetails;
 
+// Displays an error message. Invokes |callback| when the message is dismissed.
+- (void)displayErrorWithCallback:(void (^)())callback;
+
 // Called when a credit card has been successfully unmasked.
 - (void)fullCardRequestDidSucceedWithCard:(const autofill::CreditCard&)card
                                       CVC:(const base::string16&)cvc;
 
 @end
 
 #endif  // IOS_CHROME_BROWSER_PAYMENTS_PAYMENT_REQUEST_COORDINATOR_H_