The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/9f994f436c5f6994446afcefe21c675814452ae2

commit 9f994f436c5f6994446afcefe21c675814452ae2
Author: Ryan Hansberry <hansberry@chromium.org>
Date: Tue Sep 18 19:37:56 2018

[CrOS Multidevice] Do not initialize BleConnectionManager if MultiDevice APIs are active.

In the process, this also adapts HostConnectionMetricsLogger to use the MultiDevice APIs
to properly log to the "Background" versions of its metrics.

Bug: 824568,  752273 ,  854885 ,  857302 
Change-Id: I77fc52b3d07d903fe61ac62de2620216984d28de
Reviewed-on: https://chromium-review.googlesource.com/1117897
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Commit-Queue: Ryan Hansberry <hansberry@chromium.org>
Cr-Commit-Position: refs/heads/master@{#592146}
[modify] https://crrev.com/9f994f436c5f6994446afcefe21c675814452ae2/chromeos/components/tether/asynchronous_shutdown_object_container_impl.cc
[modify] https://crrev.com/9f994f436c5f6994446afcefe21c675814452ae2/chromeos/components/tether/host_connection_metrics_logger.cc
[modify] https://crrev.com/9f994f436c5f6994446afcefe21c675814452ae2/chromeos/components/tether/host_connection_metrics_logger.h
[modify] https://crrev.com/9f994f436c5f6994446afcefe21c675814452ae2/chromeos/components/tether/host_connection_metrics_logger_unittest.cc

HostConnectionMetricsLogger has now been migrated.

The metrics from BleConnectionMetricsLogger remain unmigrated. That work is already being tracked in  crbug.com/870139 , so I'm marking this bug as a duplicate of it.