Reland of [CQ] Update proto format to fix triggered builders. (patchset #1 id:1 of https://codereview.chromium.org/1485813004/ )

Reason for revert:
Should be fixed after https://codereview.chromium.org/1487413002/

Original issue's description:
> Revert of [CQ] Update proto format to fix triggered builders. (patchset #1 id:1 of https://codereview.chromium.org/1486963002/ )
>
> Reason for revert:
> Maybe causing problems
>
> Original issue's description:
> > [CQ] Update proto format to fix triggered builders.
> >
> > Depends on https://chromereviews.googleplex.com/319777013/
> >
> > BUG=chromium:561530
> > LOG=n
> > TBR=sergiyb@chromium.org, tandrii@chromium.org
> > NOTRY=true
> >
> > Committed: https://crrev.com/51d6d619330080a76c5bc7a2ebdafebc6a808aa8
> > Cr-Commit-Position: refs/heads/master@{#32453}
>
> TBR=sergiyb@chromium.org,tandrii@chromium.org
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=chromium:561530
>
> Committed: https://crrev.com/79ded5acc9da6a80cbd739c24c6dfa0cf207ae93
> Cr-Commit-Position: refs/heads/master@{#32464}

TBR=sergiyb@chromium.org,tandrii@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:561530

Review URL: https://codereview.chromium.org/1495443003

Cr-Commit-Position: refs/heads/master@{#32511}