6 files declare their use of RequestContextAwareInterface in Zircon Profile 8

ChainRouter.php in vendor/symfony-cmf/routing/ChainRouter.php

DynamicRouter.php in vendor/symfony-cmf/routing/DynamicRouter.php

LocaleListener.php in vendor/symfony/http-kernel/EventListener/LocaleListener.php

RouterListener.php in vendor/symfony/http-kernel/EventListener/RouterListener.php

UrlGeneratorInterface.php in vendor/symfony/routing/Generator/UrlGeneratorInterface.php

UrlMatcherInterface.php in vendor/symfony/routing/Matcher/UrlMatcherInterface.php