13 files declare their use of LoggerInterface

ChainRouter.php in drupal/core/vendor/symfony-cmf/routing/Symfony/Cmf/Component/Routing/ChainRouter.php
ControllerResolver.php in drupal/core/vendor/symfony/http-kernel/Symfony/Component/HttpKernel/Controller/ControllerResolver.php
ErrorHandler.php in drupal/core/vendor/symfony/debug/Symfony/Component/Debug/ErrorHandler.php
ErrorsLoggerListener.php in drupal/core/vendor/symfony/http-kernel/Symfony/Component/HttpKernel/EventListener/ErrorsLoggerListener.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
LoggerInterface.php in drupal/core/vendor/symfony/http-kernel/Symfony/Component/HttpKernel/Log/LoggerInterface.php
Profiler.php in drupal/core/vendor/symfony/http-kernel/Symfony/Component/HttpKernel/Profiler/Profiler.php
ProviderBasedGenerator.php in drupal/core/vendor/symfony-cmf/routing/Symfony/Cmf/Component/Routing/ProviderBasedGenerator.php
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
TraceableEventDispatcher.php in drupal/core/vendor/symfony/http-kernel/Symfony/Component/HttpKernel/Debug/TraceableEventDispatcher.php
UrlGenerator.php in drupal/core/vendor/symfony/routing/Symfony/Component/Routing/Generator/UrlGenerator.php