[Web Payments] Add Cancel button to all sheets

chrome/browser/ui/views/payments/order_summary_view_controller.cc

 // 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.
 
 #include "chrome/browser/ui/views/payments/order_summary_view_controller.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/logging.h"
@@ skipping 113 matching lines @@
       IDS_PAYMENT_REQUEST_ORDER_SUMMARY_SHEET_TOTAL_FORMAT,
       base::UTF8ToUTF16(request()->details()->total->amount->currency),
       formatter->Format(request()->details()->total->amount->value));
 
   content_view->AddChildView(
       CreateLineItemView(base::UTF8ToUTF16(request()->details()->total->label),
                          total_label_value, true,
                          DialogViewID::ORDER_SUMMARY_TOTAL_AMOUNT_LABEL)
           .release());
 
-  return payments::CreatePaymentView(
+  return CreatePaymentView(
       CreateSheetHeaderView(
           true,
           l10n_util::GetStringUTF16(IDS_PAYMENT_REQUEST_ORDER_SUMMARY_TITLE),
           this),
       std::move(content_view));
 }
 
-void OrderSummaryViewController::ButtonPressed(
-    views::Button* sender, const ui::Event& event) {
-  switch (sender->tag()) {
-    case static_cast<int>(PaymentRequestCommonTags::CLOSE_BUTTON_TAG):
-      dialog()->CloseDialog();
-      break;
-    case static_cast<int>(PaymentRequestCommonTags::BACK_BUTTON_TAG):
-      dialog()->GoBack();
-      break;
-    default:
-      NOTREACHED();
-  }
-}
-
 }  // namespace payments