Limit form-less Autofilling to pages that look like checkout pages.

components/autofill/core/browser/BUILD.gn

 # Copyright 2014 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.
 
 # GYP version: components/autofill.gyp:autofill_core_browser
 static_library("browser") {
   sources = [
     "address.cc",
     "address.h",
     "address_field.cc",
@@ skipping 24 matching lines @@
     "autofill_manager.cc",
     "autofill_manager.h",
     "autofill_manager_test_delegate.h",
     "autofill_metrics.cc",
     "autofill_metrics.h",
     "autofill_popup_delegate.h",
     "autofill_profile.cc",
     "autofill_profile.h",
     "autofill_regex_constants.cc",
     "autofill_regex_constants.h",
-    "autofill_regexes.cc",
-    "autofill_regexes.h",
     "autofill_scanner.cc",
     "autofill_scanner.h",
     "autofill_server_field_info.h",
     "autofill_sync_constants.cc",
     "autofill_sync_constants.h",
     "autofill_type.cc",
     "autofill_type.h",
     "autofill_xml_parser.cc",
     "autofill_xml_parser.h",
     "card_unmask_delegate.cc",
@@ skipping 143 matching lines @@
     "autofill_country_unittest.cc",
     "autofill_data_model_unittest.cc",
     "autofill_download_manager_unittest.cc",
     "autofill_external_delegate_unittest.cc",
     "autofill_field_unittest.cc",
     "autofill_ie_toolbar_import_win_unittest.cc",
     "autofill_manager_unittest.cc",
     "autofill_merge_unittest.cc",
     "autofill_metrics_unittest.cc",
     "autofill_profile_unittest.cc",
-    "autofill_regexes_unittest.cc",
     "autofill_type_unittest.cc",
     "autofill_xml_parser_unittest.cc",
     "contact_info_unittest.cc",
     "credit_card_field_unittest.cc",
     "credit_card_unittest.cc",
     "form_field_unittest.cc",
     "form_structure_unittest.cc",
     "name_field_unittest.cc",
     "password_generator_unittest.cc",
     "personal_data_manager_unittest.cc",
@@ skipping 24 matching lines @@
     "//sync",
     "//sync:test_support_sync_api",
     "//testing/gmock",
     "//testing/gtest",
     "//third_party/libphonenumber",
     "//third_party/libjingle",
     "//ui/base",
     "//url",
   ]
 }