16 files declare their use of RequestContext

ApacheUrlMatcherTest.php in drupal/core/vendor/symfony/routing/Symfony/Component/Routing/Tests/Matcher/ApacheUrlMatcherTest.php
ChainMatcher.php in drupal/core/lib/Drupal/Core/Routing/ChainMatcher.php
Definition of Drupal\Core\Routing\ChainMatcher.
LegacyUrlMatcher.php in drupal/core/lib/Drupal/Core/LegacyUrlMatcher.php
Definition of Drupal\Core\LegacyUrlMatcher.
NestedMatcher.php in drupal/core/lib/Drupal/Core/Routing/NestedMatcher.php
Definition of Drupal\Core\Routing\NestedMatcher.
PhpGeneratorDumperTest.php in drupal/core/vendor/symfony/routing/Symfony/Component/Routing/Tests/Generator/Dumper/PhpGeneratorDumperTest.php
RedirectableUrlMatcherTest.php in drupal/core/vendor/symfony/routing/Symfony/Component/Routing/Tests/Matcher/RedirectableUrlMatcherTest.php
RouterListener.php in drupal/core/vendor/symfony/http-kernel/Symfony/Component/HttpKernel/EventListener/RouterListener.php
RouterListenerTest.php in drupal/core/vendor/symfony/http-kernel/Symfony/Component/HttpKernel/Tests/EventListener/RouterListenerTest.php
TraceableUrlMatcherTest.php in drupal/core/vendor/symfony/routing/Symfony/Component/Routing/Tests/Matcher/TraceableUrlMatcherTest.php
UrlGenerator.php in drupal/core/vendor/symfony/routing/Symfony/Component/Routing/Generator/UrlGenerator.php
UrlGeneratorTest.php in drupal/core/vendor/symfony/routing/Symfony/Component/Routing/Tests/Generator/UrlGeneratorTest.php
UrlMatcher.php in drupal/core/vendor/symfony/routing/Symfony/Component/Routing/Matcher/UrlMatcher.php
UrlMatcherTest.php in drupal/core/vendor/symfony/routing/Symfony/Component/Routing/Tests/Matcher/UrlMatcherTest.php
url_matcher1.php in drupal/core/vendor/symfony/routing/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher1.php
url_matcher2.php in drupal/core/vendor/symfony/routing/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher2.php
url_matcher3.php in drupal/core/vendor/symfony/routing/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher3.php