[WebPayments] Add the Payment Method section in the Payment Sheet

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

 // 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.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_PAYMENTS_PAYMENT_REQUEST_DIALOG_H_
 #define CHROME_BROWSER_UI_VIEWS_PAYMENTS_PAYMENT_REQUEST_DIALOG_H_
 
 #include <map>
 #include <memory>
 
@@ skipping 23 matching lines @@
   // views::WidgetDelegate
   ui::ModalType GetModalType() const override;
 
   // views::DialogDelegate
   bool Cancel() override;
   bool ShouldShowCloseButton() const override;
   int GetDialogButtons() const override;
 
   void GoBack();
   void ShowOrderSummary();
+  void ShowPaymentMethodSheet();
   void CloseDialog();
 
  private:
   void ShowInitialPaymentSheet();
 
   // views::View
   gfx::Size GetPreferredSize() const override;
   void ViewHierarchyChanged(const ViewHierarchyChangedDetails& details)
       override;
 
   // Non-owned reference to the PaymentRequest that initiated this dialog. Since
   // the PaymentRequest object always outlives this one, the pointer should
   // always be valid even though there is no direct ownership relationship
   // between the two.
   PaymentRequest* request_;
   ControllerMap controller_map_;
   ViewStack view_stack_;
 
   DISALLOW_COPY_AND_ASSIGN(PaymentRequestDialog);
 };
 
 }  // namespace payments
 
 #endif  // CHROME_BROWSER_UI_VIEWS_PAYMENTS_PAYMENT_REQUEST_DIALOG_H_