The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/5ac71ddce63d827f140229d466d72982c3e4e22b

commit 5ac71ddce63d827f140229d466d72982c3e4e22b
Author: yoshiki iguchi <yoshiki@chromium.org>
Date: Thu Sep 13 04:48:11 2018

Remove unnecessary method in ArcNotificationManager and mojom

ArcNotificationManager::SendNotificationButtonClickedOnChrome is no
longer used so this CL removes this method and related mojom call.

Bug:  882453 
Change-Id: Icb363cea1eae51ee29bb229d14ff4bbfd8516467
Reviewed-on: https://chromium-review.googlesource.com/1216124
Reviewed-by: Eliot Courtney <edcourtney@chromium.org>
Reviewed-by: Greg Kerr <kerrnel@chromium.org>
Commit-Queue: Yoshiki Iguchi <yoshiki@chromium.org>
Cr-Commit-Position: refs/heads/master@{#590926}
[modify] https://crrev.com/5ac71ddce63d827f140229d466d72982c3e4e22b/ash/system/message_center/arc/arc_notification_manager.cc
[modify] https://crrev.com/5ac71ddce63d827f140229d466d72982c3e4e22b/ash/system/message_center/arc/arc_notification_manager.h
[modify] https://crrev.com/5ac71ddce63d827f140229d466d72982c3e4e22b/components/arc/common/notifications.mojom