[Form] Don't rely on `Symfony\Component\HttpFoundation\File\File` if http-foundation isn't installed in FileType#25152

Closed

issei-m wants to merge 2 commits intosymfony:2.7from

issei-m:fix-file-type

Commits on Nov 24, 2017

[Form] Don't rely on `Symfony\Component\HttpFoundation\File\File` if http-foundation isn't
issei-m
committed

Commits on Nov 26, 2017

[Form] Move check of class existence out of closure
issei-m
committed