Remove the notificationProvider extension API

chrome/test/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.
 
 import("//build/config/chrome_build.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//chrome/common/features.gni")
@@ skipping 1423 matching lines @@
       "../browser/extensions/api/management/management_api_browsertest.cc",
       "../browser/extensions/api/management/management_apitest.cc",
       "../browser/extensions/api/management/management_browsertest.cc",
       "../browser/extensions/api/media_galleries/media_galleries_apitest.cc",
       "../browser/extensions/api/media_galleries/media_galleries_watch_apitest.cc",
       "../browser/extensions/api/messaging/native_messaging_apitest.cc",
       "../browser/extensions/api/metrics_private/metrics_apitest.cc",
       "../browser/extensions/api/module/module_apitest.cc",
       "../browser/extensions/api/music_manager_private/music_manager_private_browsertest.cc",
       "../browser/extensions/api/networking_config_chromeos_apitest_chromeos.cc",
-      "../browser/extensions/api/notification_provider/notification_provider_apitest.cc",
       "../browser/extensions/api/omnibox/omnibox_api_browsertest.cc",
       "../browser/extensions/api/page_capture/page_capture_apitest.cc",
       "../browser/extensions/api/passwords_private/passwords_private_apitest.cc",
       "../browser/extensions/api/permissions/permissions_apitest.cc",
       "../browser/extensions/api/platform_keys/platform_keys_apitest_nss.cc",
       "../browser/extensions/api/preference/preference_apitest.cc",
       "../browser/extensions/api/processes/processes_apitest.cc",
       "../browser/extensions/api/proxy/proxy_apitest.cc",
       "../browser/extensions/api/resources_private/resources_private_apitest.cc",
       "../browser/extensions/api/screenlock_private/screenlock_private_apitest.cc",
@@ skipping 2518 matching lines @@
       "../browser/extensions/user_script_listener_unittest.cc",
       "../browser/extensions/warning_badge_service_unittest.cc",
       "../browser/extensions/webstore_inline_installer_unittest.cc",
       "../browser/extensions/webstore_installer_unittest.cc",
       "../browser/extensions/zipfile_installer_unittest.cc",
       "../browser/media/cast_remoting_sender_unittest.cc",
       "../browser/media/cast_transport_host_filter_unittest.cc",
       "../browser/media_galleries/chromeos/mtp_device_object_enumerator_unittest.cc",
       "../browser/metrics/extensions_metrics_provider_unittest.cc",
       "../browser/notifications/extension_welcome_notification_unittest.cc",
-      "../browser/notifications/notification_conversion_helper_unittest.cc",
       "../browser/renderer_context_menu/context_menu_content_type_unittest.cc",
       "../browser/safe_search_api/safe_search_url_checker_unittest.cc",
       "../browser/search/hotword_service_unittest.cc",
       "../browser/signin/easy_unlock_app_manager_unittest.cc",
       "../browser/signin/easy_unlock_auth_attempt_unittest.cc",
       "../browser/signin/easy_unlock_screenlock_state_handler_unittest.cc",
       "../browser/signin/easy_unlock_service_unittest_chromeos.cc",
       "../browser/signin/mutable_profile_oauth2_token_service_delegate_unittest.cc",
       "../browser/sync/glue/extensions_activity_monitor_unittest.cc",
       "../browser/sync_file_system/drive_backend/callback_helper_unittest.cc",
@@ skipping 1141 matching lines @@
 }
 
 if (is_win) {
   loadable_module("conflicts_dll") {
     testonly = true
     sources = [
       "conflicts/conflicts_dll.cc",
     ]
   }
 }