The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/2c082ada82ae0442e4241dcac92bc462a82a03e6

commit 2c082ada82ae0442e4241dcac92bc462a82a03e6
Author: Andrew Moylan <amoylan@chromium.org>
Date: Mon Aug 06 04:13:04 2018

ML Service D-Bus client: Don't WaitForServiceToBeAvailable

ML Service is being configured to launch automatically via D-Bus service
activation (crrev.com/c/1163227 and crrev.com/c/1163228), instead of
launching at boot time. Therefore, we won't need to
WaitForServiceToBeAvailable any more.

Tested by:
Test build with CrOS CLs above & a modified Chrome that calls ML Service
a few times.

Bug:  863781 
Change-Id: I508ee505705de14332b1cdf4e5b0b29c04937c7b
Reviewed-on: https://chromium-review.googlesource.com/1163229
Reviewed-by: Dan Erat <derat@chromium.org>
Commit-Queue: Andrew Moylan <amoylan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#580800}
[modify] https://crrev.com/2c082ada82ae0442e4241dcac92bc462a82a03e6/chromeos/dbus/machine_learning_client.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/platform2/+/6d0ebf96f5e1ffdd19761e734e5fb5262deb2482

commit 6d0ebf96f5e1ffdd19761e734e5fb5262deb2482
Author: Andrew Moylan <amoylan@chromium.org>
Date: Mon Aug 06 09:44:54 2018

ml: Set up D-Bus service activation

* Add a D-Bus service activation config that uses upstart to launch ML
  Service.
* Update the ML Service upstart config to not automatically launch during
  boot, and to wait for ML Service to register its D-Bus name before
  transitioning to 'started' state.

BUG= chromium:863781 
TEST=Ran together with locally modified Chrome that calls ML Service.

Change-Id: Iab5a9140c86ad8184dec1f09a53a0edfff524729
Reviewed-on: https://chromium-review.googlesource.com/1163228
Commit-Ready: Andrew Moylan <amoylan@chromium.org>
Tested-by: Andrew Moylan <amoylan@chromium.org>
Reviewed-by: Dan Erat <derat@chromium.org>

[add] https://crrev.com/6d0ebf96f5e1ffdd19761e734e5fb5262deb2482/ml/dbus/org.chromium.MachineLearning.service
[modify] https://crrev.com/6d0ebf96f5e1ffdd19761e734e5fb5262deb2482/ml/init/ml-service.conf

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/overlays/chromiumos-overlay/+/91a43703e489d1089bd1e838a92dfbcb232ea223

commit 91a43703e489d1089bd1e838a92dfbcb232ea223
Author: Andrew Moylan <amoylan@chromium.org>
Date: Mon Aug 06 17:04:42 2018

chromeos-base/ml: Install D-Bus service activation config

Install D-Bus service activation config file so that ML Service can be
started on-demand instead of at startup time.

CQ-DEPEND=CL:1163228
BUG= chromium:863781 
TEST=Ran together with locally modified Chrome that calls ML Service.

Change-Id: I2180cd3dc6350ca0895e80b0335cf16f7f02421e
Reviewed-on: https://chromium-review.googlesource.com/1163227
Commit-Ready: Andrew Moylan <amoylan@chromium.org>
Tested-by: Andrew Moylan <amoylan@chromium.org>
Reviewed-by: Dan Erat <derat@chromium.org>

[modify] https://crrev.com/91a43703e489d1089bd1e838a92dfbcb232ea223/chromeos-base/ml/ml-9999.ebuild