The problem patch is here:

https://chromium-review.googlesource.com/#/c/354132/

It actually landed here, despite the wrong gerrit status:

https://chromium.googlesource.com/chromiumos/platform/ec/+/0be630aa265d11fab7dd9a2133a36b04e4753666

Commit Bot noted the following:

Patch Set 1:
The Commit Queue failed to apply your change in https://uberchromegw.corp.google.com/i/chromeos/builders/master-paladin/builds/11546 . CL:354132 had no changes after rebasing to ToT.
Commit queue documentation: http://www.chromium.org/developers/tree-sheriffs/sheriff-details-chromium-os/commit-queue-overview