This will allow ANGLE to share the same source location as
Chromium.

Bug: chromium:1074162
Change-Id: I3ea9820cc1fe9cd0bfec81d734168213e5c1bb0b
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2176067Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>