[Web Payments] Add Cancel button to all sheets

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

Index: chrome/browser/ui/views/payments/order_summary_view_controller.cc
diff --git a/chrome/browser/ui/views/payments/order_summary_view_controller.cc b/chrome/browser/ui/views/payments/order_summary_view_controller.cc
index f0f33f9176a1b6152702fc9ef991811b4788c0d0..962c9490da820fe1cbf850a9eb55b0b83bce2d8f 100644
--- a/chrome/browser/ui/views/payments/order_summary_view_controller.cc
+++ b/chrome/browser/ui/views/payments/order_summary_view_controller.cc
@@ -136,21 +136,8 @@ std::unique_ptr<views::View> OrderSummaryViewController::CreateView() {
           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();
-  }
+      std::move(content_view),
+      CreateButtonsView(this));
 }
 
 }  // namespace payments