11 files declare their use of LoggerInterface

ContainerAwareTraceableEventDispatcher.php in drupal/core/vendor/symfony/http-kernel/Symfony/Component/HttpKernel/Debug/ContainerAwareTraceableEventDispatcher.php
ControllerResolver.php in drupal/core/lib/Drupal/Core/ControllerResolver.php
Definition of Drupal\Core\ControllerResolver.
ControllerResolver.php in drupal/core/vendor/symfony/http-kernel/Symfony/Component/HttpKernel/Controller/ControllerResolver.php
ExceptionListener.php in drupal/core/vendor/symfony/http-kernel/Symfony/Component/HttpKernel/EventListener/ExceptionListener.php
Logger.php in drupal/core/vendor/symfony/http-kernel/Symfony/Component/HttpKernel/Tests/Logger.php
NullLogger.php in drupal/core/vendor/symfony/http-kernel/Symfony/Component/HttpKernel/Log/NullLogger.php
Profiler.php in drupal/core/vendor/symfony/http-kernel/Symfony/Component/HttpKernel/Profiler/Profiler.php
RouteProcessorSubscriber.php in drupal/core/lib/Drupal/Core/EventSubscriber/RouteProcessorSubscriber.php
Definition of Drupal\Core\EventSubscriber\RouteProcessorSubscriber.
Router.php in drupal/core/vendor/symfony/routing/Symfony/Component/Routing/Router.php
RouterListener.php in drupal/core/vendor/symfony/http-kernel/Symfony/Component/HttpKernel/EventListener/RouterListener.php
UrlGenerator.php in drupal/core/vendor/symfony/routing/Symfony/Component/Routing/Generator/UrlGenerator.php