[Web Payments] Implement the CVC Unmask dialog.

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

 // 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.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_PAYMENTS_PAYMENT_REQUEST_DIALOG_VIEW_IDS_H_
 #define CHROME_BROWSER_UI_VIEWS_PAYMENTS_PAYMENT_REQUEST_DIALOG_VIEW_IDS_H_
 
 #include "components/autofill/core/browser/field_types.h"
 
 // This defines an enumeration of IDs that can uniquely identify a view within
@@ skipping 10 matching lines @@
   PAYMENT_SHEET_SHIPPING_SECTION,
   PAYMENT_SHEET_SUMMARY_SECTION,
   PAYMENT_SHEET_SHIPPING_OPTION_SECTION,
   PAYMENT_METHOD_ADD_CARD_BUTTON,
   PAYMENT_METHOD_ADD_SHIPPING_BUTTON,
   PAYMENT_METHOD_ADD_CONTACT_BUTTON,
   EDITOR_SAVE_BUTTON,
   PAY_BUTTON,
   CANCEL_BUTTON,
   BACK_BUTTON,
+  CVC_PROMPT_CONFIRM_BUTTON,
 
   // The following are Label objects.
   ORDER_SUMMARY_TOTAL_AMOUNT_LABEL,
   ORDER_SUMMARY_LINE_ITEM_1,
   ORDER_SUMMARY_LINE_ITEM_2,
   ORDER_SUMMARY_LINE_ITEM_3,
   SHIPPING_OPTION_DESCRIPTION,
   SHIPPING_OPTION_AMOUNT,
 
   // Used in "three line labels" to annotate each Label of the grouping.
   THREE_LINE_LABEL_LINE_1,
   THREE_LINE_LABEL_LINE_2,
   THREE_LINE_LABEL_LINE_3,
 
   // The following are views contained within the Payment Method Sheet.
   CONTACT_INFO_SHEET_LIST_VIEW,
   PAYMENT_METHOD_SHEET_LIST_VIEW,
   SHIPPING_ADDRESS_SHEET_LIST_VIEW,
 
   // Used in selectable rows. Each row in a view reuses this ID, but the ID is
   // unique at the scope of the parent row.
   CHECKMARK_VIEW,
 
   // Used to label the error labels with an offset, which gets added to
   // the Autofill type value they represent (for tests).
   ERROR_LABEL_OFFSET,
+
+  // The CVC text field in the unmask sheet.
+  CVC_PROMPT_TEXT_FIELD,
 };
 
 }  // namespace payments
 
 #endif  // CHROME_BROWSER_UI_VIEWS_PAYMENTS_PAYMENT_REQUEST_DIALOG_VIEW_IDS_H_