14 files declare their use of InstallerKernel in Drupal 8

bootstrap.inc in core/includes/bootstrap.inc

Functions that need to be loaded on every Drupal request.

ChainedFastBackendFactory.php in core/lib/Drupal/Core/Cache/ChainedFastBackendFactory.php

ConfigImporterBatch.php in core/lib/Drupal/Core/Config/Importer/ConfigImporterBatch.php

ConfigImportSubscriber.php in core/lib/Drupal/Core/EventSubscriber/ConfigImportSubscriber.php

ConfigInstaller.php in core/lib/Drupal/Core/Config/ConfigInstaller.php

content_translation.install in core/modules/content_translation/content_translation.install

Installation functions for Content Translation module.

DrupalKernel.php in core/lib/Drupal/Core/DrupalKernel.php

errors.inc in core/includes/errors.inc

Functions for error handling.

FormSubmitter.php in core/lib/Drupal/Core/Form/FormSubmitter.php

install.core.inc in core/includes/install.core.inc

API functions for installing Drupal.

install.inc in core/includes/install.inc

API functions for installing modules and themes.

locale.module in core/modules/locale/locale.module

Enables the translation of the user interface to languages other than English.

LocaleConfigSubscriber.php in core/modules/locale/src/LocaleConfigSubscriber.php

theme.maintenance.inc in core/includes/theme.maintenance.inc

Theming for maintenance pages.