Cancels payment request when Settings is tapped, and opens the Autofill settings page.

ios/chrome/browser/payments/payment_request_view_controller.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_VIEW_CONTROLLER_H_
 #define IOS_CHROME_BROWSER_PAYMENTS_PAYMENT_REQUEST_VIEW_CONTROLLER_H_
 
 #import <UIKit/UIKit.h>
 
 #include "ios/chrome/browser/payments/payment_request.h"
@@ skipping 10 matching lines @@
 @protocol PaymentRequestViewControllerDelegate<NSObject>
 
 // Notifies the delegate that the user has canceled the payment request.
 - (void)paymentRequestViewControllerDidCancel:
     (PaymentRequestViewController*)controller;
 
 // Notifies the delegate that the user has confirmed the payment request.
 - (void)paymentRequestViewControllerDidConfirm:
     (PaymentRequestViewController*)controller;
 
+// Notifies the delegate that the user has selected to go to the card and
+// address options page in Settings.
+- (void)paymentRequestViewControllerDidSelectSettings:
+    (PaymentRequestViewController*)controller;
+
 // Notifies the delegate that the user has selected the payment summary item.
 - (void)paymentRequestViewControllerDidSelectPaymentSummaryItem:
     (PaymentRequestViewController*)controller;
 
 // Notifies the delegate that the user has selected the shipping address item.
 - (void)paymentRequestViewControllerDidSelectShippingAddressItem:
     (PaymentRequestViewController*)controller;
 
 // Notifies the delegate that the user has selected the shipping option item.
 - (void)paymentRequestViewControllerDidSelectShippingOptionItem:
@@ skipping 53 matching lines @@
     NS_DESIGNATED_INITIALIZER;
 
 - (instancetype)init NS_UNAVAILABLE;
 
 - (instancetype)initWithStyle:(CollectionViewControllerStyle)style
     NS_UNAVAILABLE;
 
 @end
 
 #endif  // IOS_CHROME_BROWSER_PAYMENTS_PAYMENT_REQUEST_VIEW_CONTROLLER_H_