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

ios/chrome/browser/payments/payment_items_display_coordinator.mm

+// 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.
+
+#import "ios/chrome/browser/payments/payment_items_display_coordinator.h"
+
+#import "base/ios/weak_nsobject.h"
+#include "base/mac/scoped_nsobject.h"
+#include "ios/web/public/payments/payment_request.h"
+
+@interface PaymentItemsDisplayCoordinator ()<
+    PaymentItemsDisplayViewControllerDelegate> {
+  base::WeakNSProtocol<id<PaymentItemsDisplayCoordinatorDelegate>> _delegate;
+  base::scoped_nsobject<PaymentItemsDisplayViewController> _viewController;
+}
+
+@end
+
+@implementation PaymentItemsDisplayCoordinator
+
+@synthesize total = _total;
+@synthesize paymentItems = _paymentItems;
+@synthesize payButtonEnabled = _payButtonEnabled;
+
+- (id<PaymentItemsDisplayCoordinatorDelegate>)delegate {
+  return _delegate.get();
+}
+
+- (void)setDelegate:(id<PaymentItemsDisplayCoordinatorDelegate>)delegate {
+  _delegate.reset(delegate);
+}
+
+- (void)start {
+  _viewController.reset([[PaymentItemsDisplayViewController alloc]
+      initWithPayButtonEnabled:_payButtonEnabled]);
+  [_viewController setTotal:_total];
+  [_viewController setPaymentItems:_paymentItems];
+  [_viewController setDelegate:self];
+  [_viewController loadModel];
+
+  DCHECK([self baseViewController].navigationController);
+  [[self baseViewController].navigationController
+      pushViewController:_viewController
+                animated:YES];
+}
+
+- (void)stop {
+  [[self baseViewController].navigationController
+      popViewControllerAnimated:YES];
+  _viewController.reset();
+}
+
+#pragma mark - PaymentItemsDisplayViewControllerDelegate
+
+- (void)paymentItemsDisplayViewControllerDidReturn:
+    (PaymentItemsDisplayViewController*)controller {
+  [_delegate paymentItemsDisplayCoordinatorDidReturn:self];
+}
+
+- (void)paymentItemsDisplayViewControllerDidConfirm:
+    (PaymentItemsDisplayViewController*)controller {
+  [_delegate paymentItemsDisplayCoordinatorDidConfirm:self];
+}
+
+@end