GitLab

Remove use of QuitCurrentWhenIdleDeprecated in FileProxyTest.

BUG=None
R=fdoray@chromium.org

Change-Id: Ic566ca8d92ddaca27b127099f9437d0e0a4d6e79
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1889973
Auto-Submit: Greg Thompson <grt@chromium.org>
Reviewed-by: François Doray <fdoray@chromium.org>
Commit-Queue: Greg Thompson <grt@chromium.org>
Cr-Commit-Position: refs/heads/master@{#710886}