Upstream Chrome on iOS source code [2/11].

ios/chrome/browser/payments/payment_items_display_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_ITEMS_DISPLAY_VIEW_CONTROLLER_H_
+#define IOS_CHROME_BROWSER_PAYMENTS_PAYMENT_ITEMS_DISPLAY_VIEW_CONTROLLER_H_
+
+#import <UIKit/UIKit.h>
+#include <vector>
+
+#import "ios/chrome/browser/ui/collection_view/collection_view_controller.h"
+#include "ios/web/public/payments/payment_request.h"
+
+@class PaymentItemsDisplayViewController;
+
+// Protocol for communicating with the delegate supplied to
+// PaymentItemsDisplayViewController.
+@protocol PaymentItemsDisplayViewControllerDelegate<NSObject>
+
+// Notifies the delegate that the user has chosen to return to the previous
+// screen.
+- (void)paymentItemsDisplayViewControllerDidReturn:
+    (PaymentItemsDisplayViewController*)controller;
+
+// Notifies the delegate that the user has confirmed the payment.
+- (void)paymentItemsDisplayViewControllerDidConfirm:
+    (PaymentItemsDisplayViewController*)controller;
+
+@end
+
+// View controller responsible for presenting the payment items from the payment
+// request. The payment items are the line items that should sum to the total
+// payment (e.g. individual goods/services, tax, shipping).
+@interface PaymentItemsDisplayViewController : CollectionViewController
+
+// The payment total to be displayed to the user.
+@property(nonatomic, assign) web::PaymentItem total;
+
+// The line items to be displayed to the user.
+@property(nonatomic, assign) std::vector<web::PaymentItem> paymentItems;
+
+// The delegate to be notified when the user selects touches the return button
+// or the pay button.
+@property(nonatomic, weak) id<PaymentItemsDisplayViewControllerDelegate>
+    delegate;
+
+- (instancetype)initWithPayButtonEnabled:(BOOL)payButtonEnabled
+    NS_DESIGNATED_INITIALIZER;
+
+- (instancetype)initWithStyle:(CollectionViewControllerStyle)style
+    NS_UNAVAILABLE;
+
+@end
+
+#endif  // IOS_CHROME_BROWSER_PAYMENTS_PAYMENT_ITEMS_DISPLAY_VIEW_CONTROLLER_H_