The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/7ec9bdc845a00ca7e599179bb32ab6f682dc6f00

commit 7ec9bdc845a00ca7e599179bb32ab6f682dc6f00
Author: Ryan Hansberry <hansberry@chromium.org>
Date: Tue Oct 31 00:13:34 2017

Remove all screen lock logic from TetherService.

Bug:  779649 
Change-Id: Ic3ffb1886a3d3dae5389aef0d5a52c12c6c31635
Reviewed-on: https://chromium-review.googlesource.com/744422
Commit-Queue: Dan Erat <derat@chromium.org>
Reviewed-by: Jeremy Klein <jlklein@chromium.org>
Reviewed-by: Steven Holte <holte@chromium.org>
Cr-Commit-Position: refs/heads/master@{#512684}
[modify] https://crrev.com/7ec9bdc845a00ca7e599179bb32ab6f682dc6f00/chrome/browser/chromeos/tether/fake_tether_service.cc
[modify] https://crrev.com/7ec9bdc845a00ca7e599179bb32ab6f682dc6f00/chrome/browser/chromeos/tether/fake_tether_service.h
[modify] https://crrev.com/7ec9bdc845a00ca7e599179bb32ab6f682dc6f00/chrome/browser/chromeos/tether/tether_service.cc
[modify] https://crrev.com/7ec9bdc845a00ca7e599179bb32ab6f682dc6f00/chrome/browser/chromeos/tether/tether_service.h
[modify] https://crrev.com/7ec9bdc845a00ca7e599179bb32ab6f682dc6f00/chrome/browser/chromeos/tether/tether_service_factory.cc
[modify] https://crrev.com/7ec9bdc845a00ca7e599179bb32ab6f682dc6f00/chrome/browser/chromeos/tether/tether_service_unittest.cc
[modify] https://crrev.com/7ec9bdc845a00ca7e599179bb32ab6f682dc6f00/tools/metrics/histograms/histograms.xml