Conforms a bit more to the proposed DEPS standardization.

Bug: chromium:782846
Change-Id: I65eae268dc9ebe4a56382db67fd123a0beafa656
Reviewed-on: https://chromium-review.googlesource.com/1027792
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>