[Web Payments] Implement the CVC Unmask dialog.

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

 // 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.
 
 #include <vector>
 
 #include "base/macros.h"
+#include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/ui/views/payments/payment_request_browsertest_base.h"
 #include "chrome/browser/ui/views/payments/payment_request_dialog_view_ids.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "components/autofill/core/browser/autofill_test_utils.h"
 #include "components/autofill/core/browser/credit_card.h"
 #include "content/public/test/browser_test_utils.h"
 
 namespace payments {
 
 class PaymentRequestErrorMessageTest : public PaymentRequestBrowserTestBase {
  protected:
   PaymentRequestErrorMessageTest()
       : PaymentRequestBrowserTestBase(
             "/payment_request_fail_complete_test.html") {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(PaymentRequestErrorMessageTest);
 };
 
 // Testing the use of the complete('fail') JS API and the error message.
 IN_PROC_BROWSER_TEST_F(PaymentRequestErrorMessageTest, CompleteFail) {
   AddCreditCard(autofill::test::GetCreditCard());  // Visa
   InvokePaymentRequestUI();
 
   // We are ready to pay.
   ASSERT_TRUE(IsPayButtonEnabled());
 
   // Once "Pay" is clicked, the page will call complete('fail') and the error
   // message should be shown.
+  OpenCVCPromptWithCVC(base::ASCIIToUTF16("123"));
+
   ResetEventObserver(DialogEvent::ERROR_MESSAGE_SHOWN);
-  ClickOnDialogViewAndWait(DialogViewID::PAY_BUTTON);
+  ClickOnDialogViewAndWait(DialogViewID::CVC_PROMPT_CONFIRM_BUTTON);
 
   // The user can only close the dialog at this point.
   ResetEventObserver(DialogEvent::DIALOG_CLOSED);
   ClickOnDialogViewAndWait(DialogViewID::CANCEL_BUTTON,
                            /*wait_for_animation=*/false);
 }
 
 }  // namespace payments