The following revision refers to this bug:
  https://chromium.googlesource.com/infra/infra.git/+/40058e788492d6294d158fa2c3d1a23de0c3f7d6

commit 40058e788492d6294d158fa2c3d1a23de0c3f7d6
Author: Dan Jacques <dnj@chromium.org>
Date: Wed Dec 21 19:41:41 2016

Suppress gRPC print output in Kitchen.

Add log level configuration to Kitchen. Add custom gRPC logger to
suppress gRPC messages when not logging at Debug-level.

BUG= chromium:676405 
TEST=unit

Change-Id: I662815956f84e6d883b6c13b389fb830bfc8bed1
Reviewed-on: https://chromium-review.googlesource.com/423113
Reviewed-by: Marc-Antoine Ruel <maruel@chromium.org>
Reviewed-by: Daniel Jacques <dnj@chromium.org>
Commit-Queue: Daniel Jacques <dnj@chromium.org>

[modify] https://crrev.com/40058e788492d6294d158fa2c3d1a23de0c3f7d6/go/src/infra/tools/kitchen/cook_logdog.go
[modify] https://crrev.com/40058e788492d6294d158fa2c3d1a23de0c3f7d6/go/src/infra/tools/kitchen/cook_logdog_test.go
[modify] https://crrev.com/40058e788492d6294d158fa2c3d1a23de0c3f7d6/go/src/infra/tools/kitchen/kitchen.go

Should be fixed when next CIPD roll finishes.