This is needed in order to be able to use the set_component_rev feature in
https://cs.chromium.org/chromium/build/scripts/slave/recipe_modules/chromium_tests/api.py?rcl=0&l=169
which is needed for having the testers to sync the same WebRTC revision
as the builders.

This is a follow-up for https://chromium-review.googlesource.com/c/414110

BUG=chromium:669818
TBR=tandrii@chromium.org

Change-Id: I6ca77e739513009e503a3b2a6fedacde8730e9a4
Reviewed-on: https://chromium-review.googlesource.com/415788Reviewed-by: Henrik Kjellander <kjellander-cc@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Andrii Shyshkalov <tandrii@chromium.org>
Commit-Queue: Henrik Kjellander <kjellander-cc@chromium.org>