[Web Payments] Add Cancel button to all sheets

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

Index: chrome/browser/ui/views/payments/order_summary_view_controller.h
diff --git a/chrome/browser/ui/views/payments/order_summary_view_controller.h b/chrome/browser/ui/views/payments/order_summary_view_controller.h
index 9f052699fbb4d1135fa05803961f9d59b61cd300..f6efe32f76dd1bb78e92e5e16a192bb87eb3fb5c 100644
--- a/chrome/browser/ui/views/payments/order_summary_view_controller.h
+++ b/chrome/browser/ui/views/payments/order_summary_view_controller.h
@@ -7,7 +7,6 @@
 
 #include "base/macros.h"
 #include "chrome/browser/ui/views/payments/payment_request_sheet_controller.h"
-#include "ui/views/controls/button/vector_icon_button_delegate.h"
 
 namespace payments {
 
@@ -16,8 +15,7 @@ class PaymentRequestDialogView;
 
 // The PaymentRequestSheetController subtype for the Order Summary screen of the
 // Payment Request flow.
-class OrderSummaryViewController : public PaymentRequestSheetController,
-                                   public views::VectorIconButtonDelegate {
+class OrderSummaryViewController : public PaymentRequestSheetController {
  public:
   // Does not take ownership of the arguments, which should outlive this object.
   OrderSummaryViewController(PaymentRequest* request,
@@ -28,9 +26,6 @@ class OrderSummaryViewController : public PaymentRequestSheetController,
   std::unique_ptr<views::View> CreateView() override;
 
  private:
-  // views::VectorIconButtonDelegate:
-  void ButtonPressed(views::Button* sender, const ui::Event& event) override;
-
   DISALLOW_COPY_AND_ASSIGN(OrderSummaryViewController);
 };