/usr/share/php/Symfony/Component/HttpFoundation/File/ is in php-symfony-http-foundation 2.3.21+dfsg-4+deb8u3.
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/usr/share/php/Symfony/Component/HttpFoundation/File/Exception/
/usr/share/php/Symfony/Component/HttpFoundation/File/Exception/AccessDeniedException.php
/usr/share/php/Symfony/Component/HttpFoundation/File/Exception/FileException.php
/usr/share/php/Symfony/Component/HttpFoundation/File/Exception/FileNotFoundException.php
/usr/share/php/Symfony/Component/HttpFoundation/File/Exception/UnexpectedTypeException.php
/usr/share/php/Symfony/Component/HttpFoundation/File/Exception/UploadException.php
/usr/share/php/Symfony/Component/HttpFoundation/File/File.php
/usr/share/php/Symfony/Component/HttpFoundation/File/MimeType/
/usr/share/php/Symfony/Component/HttpFoundation/File/MimeType/ExtensionGuesser.php
/usr/share/php/Symfony/Component/HttpFoundation/File/MimeType/ExtensionGuesserInterface.php
/usr/share/php/Symfony/Component/HttpFoundation/File/MimeType/FileBinaryMimeTypeGuesser.php
/usr/share/php/Symfony/Component/HttpFoundation/File/MimeType/FileinfoMimeTypeGuesser.php
/usr/share/php/Symfony/Component/HttpFoundation/File/MimeType/MimeTypeExtensionGuesser.php
/usr/share/php/Symfony/Component/HttpFoundation/File/MimeType/MimeTypeGuesser.php
/usr/share/php/Symfony/Component/HttpFoundation/File/MimeType/MimeTypeGuesserInterface.php
/usr/share/php/Symfony/Component/HttpFoundation/File/UploadedFile.php