The corresponding gclient variables are set now via:
https://crrev.com/c/913368

Bug: chromium:772804
Change-Id: I9c96bde3e6cc88d84a320c00d3316a91c48749f7
Reviewed-on: https://chromium-review.googlesource.com/913351Reviewed-by: Sergiy Byelozyorov <sergiyb@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51240}