[Web Payments] Implement the CVC Unmask dialog.

components/payments/core/BUILD.gn

 # 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.
 
 static_library("core") {
   sources = [
     "address_normalizer.cc",
     "address_normalizer.h",
     "autofill_payment_instrument.cc",
     "autofill_payment_instrument.h",
     "basic_card_response.cc",
     "basic_card_response.h",
     "currency_formatter.cc",
     "currency_formatter.h",
     "journey_logger.cc",
     "journey_logger.h",
     "payment_address.cc",
     "payment_address.h",
     "payment_instrument.cc",
     "payment_instrument.h",
     "payment_method_data.cc",
     "payment_method_data.h",
     "payment_options_provider.h",
     "payment_request_data_util.cc",
     "payment_request_data_util.h",
+    "payment_request_delegate.h",
     "strings_util.cc",
     "strings_util.h",
   ]
 
   deps = [
     "//base",
     "//components/autofill/core/browser",
     "//components/strings:components_strings_grit",
     "//ui/base",
   ]
@@ skipping 18 matching lines @@
   deps = [
     ":core",
     "//base",
     "//base/test:test_support",
     "//components/autofill/core/browser",
     "//components/autofill/core/browser:test_support",
     "//testing/gtest",
     "//third_party/libaddressinput:test_support",
   ]
 }