Hide standard output from the browser when running git-cl-web
Hide standard output from the browser when running git-cl-web

R=ef4933a197ef7b4b3f55f1bec4942aead3637a2a@chromium.org

Change-Id: I0816a109bc50cbc5c06339b832748f03abee372a
Reviewed-on: https://chromium-review.googlesource.com/c/1296511
Commit-Queue: Sergiy Byelozyorov <aadb4a11584aa9878242ea5d9e4b7e3429654579@chromium.org>
Reviewed-by: Nodir Turakulov <ef4933a197ef7b4b3f55f1bec4942aead3637a2a@chromium.org>

CoherentLabs/depot_tools,CoherentLabs/depot_tools