The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/e17296f164793f5797524fdbbe312823e64b5cd9

commit e17296f164793f5797524fdbbe312823e64b5cd9
Author: lgcheng <lgcheng@google.com>
Date: Mon Jun 18 23:35:13 2018

arc: deliver USB detach event to container

USB detach event not delivered to Arc container

After usb_service called OnDeviceRemoved(), query usb_service for this
device will not(gurantee) return any result.

Use the scoped_refptr passed by OnDeviceRemoved directly and deliver the
detach event to ARC container.

Bug:  853353 
Test: Manual
Change-Id: I74214b455a678548c3a80eebf214fdfa5beced99
Reviewed-on: https://chromium-review.googlesource.com/1103284
Commit-Queue: Long Cheng <lgcheng@google.com>
Reviewed-by: Luis Hector Chavez <lhchavez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#568232}
[modify] https://crrev.com/e17296f164793f5797524fdbbe312823e64b5cd9/components/arc/usb/usb_host_bridge.cc
[modify] https://crrev.com/e17296f164793f5797524fdbbe312823e64b5cd9/components/arc/usb/usb_host_bridge.h