[Payments] Desktop: Error message in the dialog.

chrome/browser/payments/chrome_payment_request_delegate.cc

 // 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.
 
 #include "chrome/browser/payments/chrome_payment_request_delegate.h"
 
 #include "base/macros.h"
 #include "chrome/browser/autofill/personal_data_manager_factory.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 13 matching lines @@
   dialog_->ShowDialog();
 }
 
 void ChromePaymentRequestDelegate::CloseDialog() {
   if (dialog_) {
     dialog_->CloseDialog();
     dialog_ = nullptr;
   }
 }
 
+void ChromePaymentRequestDelegate::ShowErrorMessage() {
+  if (dialog_)
+    dialog_->ShowErrorMessage();
+}
+
 autofill::PersonalDataManager*
 ChromePaymentRequestDelegate::GetPersonalDataManager() {
   return autofill::PersonalDataManagerFactory::GetForProfile(
       Profile::FromBrowserContext(web_contents_->GetBrowserContext()));
 }
 
 const std::string& ChromePaymentRequestDelegate::GetApplicationLocale() const {
   return g_browser_process->GetApplicationLocale();
 }
 
 bool ChromePaymentRequestDelegate::IsIncognito() const {
   Profile* profile =
       Profile::FromBrowserContext(web_contents_->GetBrowserContext());
   return profile && profile->GetProfileType() == Profile::INCOGNITO_PROFILE;
 }
 
 }  // namespace payments