[Payment Request] Error message screen

ios/chrome/browser/payments/payment_request_error_coordinator.mm

+// Copyright 2017 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_request_error_coordinator.h"
+
+#include "components/strings/grit/components_strings.h"
+#include "ui/base/l10n/l10n_util.h"
+
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
+@interface PaymentRequestErrorCoordinator () {
+  PaymentRequestErrorViewController* _viewController;
+}
+
+@end
+
+@implementation PaymentRequestErrorCoordinator
+
+@synthesize callback = _callback;
+@synthesize delegate = _delegate;
+
+- (void)start {
+  _viewController = [[PaymentRequestErrorViewController alloc] init];
+  [_viewController
+      setErrorMessage:l10n_util::GetNSString(IDS_PAYMENTS_ERROR_MESSAGE)];
+  [_viewController setDelegate:self];
+  [_viewController loadModel];
+
+  [[self baseViewController] presentViewController:_viewController
+                                          animated:YES
+                                        completion:nil];
+}
+
+- (void)stop {
+  [[_viewController presentingViewController]
+      dismissViewControllerAnimated:YES
+                         completion:nil];
+  _viewController = nil;
+}
+
+#pragma mark - PaymentRequestErrorViewControllerDelegate
+
+- (void)paymentRequestErrorViewControllerDidDismiss:
+    (PaymentRequestErrorViewController*)controller {
+  [_delegate paymentRequestErrorCoordinatorDidDismiss:self];
+}
+
+@end