The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/c903aa211713230a52ff958ab4171eb2aa827bcc

commit c903aa211713230a52ff958ab4171eb2aa827bcc
Author: Kevin Strohbehn <ginko@google.com>
Date: Thu Aug 09 22:30:53 2018

Destroy touch controller when search box isn't being interacted with

Bug:  869638 
Change-Id: Ifea913dd4df2c94487173e87eba2bd860802c6c9
Reviewed-on: https://chromium-review.googlesource.com/1168475
Commit-Queue: Kevin Strohbehn <ginko@google.com>
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Reviewed-by: Weidong Guo <weidongg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#581926}
[modify] https://crrev.com/c903aa211713230a52ff958ab4171eb2aa827bcc/ash/app_list/views/app_list_view.cc
[modify] https://crrev.com/c903aa211713230a52ff958ab4171eb2aa827bcc/ui/chromeos/search_box/search_box_view_base.cc
[modify] https://crrev.com/c903aa211713230a52ff958ab4171eb2aa827bcc/ui/chromeos/search_box/search_box_view_base.h