[Payment Request] Error message screen

ios/chrome/browser/payments/payment_request_error_coordinator.mm

Index: ios/chrome/browser/payments/payment_request_error_coordinator.mm
diff --git a/ios/chrome/browser/payments/payment_request_error_coordinator.mm b/ios/chrome/browser/payments/payment_request_error_coordinator.mm
new file mode 100644
index 0000000000000000000000000000000000000000..ca66b0ae9c8c9f9bb4d672db060c9624dee90973
--- /dev/null
+++ b/ios/chrome/browser/payments/payment_request_error_coordinator.mm
@@ -0,0 +1,57 @@
+// 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"
+
+#import "base/ios/weak_nsobject.h"
+#include "base/mac/scoped_nsobject.h"
+#include "components/strings/grit/components_strings.h"
+#include "ui/base/l10n/l10n_util.h"
+
+@interface PaymentRequestErrorCoordinator () {
+  base::WeakNSProtocol<id<PaymentRequestErrorCoordinatorDelegate>> _delegate;
+  base::scoped_nsobject<PaymentRequestErrorViewController> _viewController;
+}
+
+@end
+
+@implementation PaymentRequestErrorCoordinator
+
+@synthesize callback = _callback;
+
+- (id<PaymentRequestErrorCoordinatorDelegate>)delegate {
+  return _delegate.get();
+}
+
+- (void)setDelegate:(id<PaymentRequestErrorCoordinatorDelegate>)delegate {
+  _delegate.reset(delegate);
+}
+
+- (void)start {
+  _viewController.reset([[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.reset();
+}
+
+#pragma mark - PaymentRequestErrorViewControllerDelegate
+
+- (void)paymentRequestErrorViewControllerDidDismiss:
+    (PaymentRequestErrorViewController*)controller {
+  [_delegate paymentRequestErrorCoordinatorDidDismiss:self];
+}
+
+@end