Merge request for CL: https://chromium-review.googlesource.com/c/chromium/src/+/1217761, It's a small fix which was validated via testing on M69 device.

This bug requires manual review: Request affecting a post-stable build
Please contact the milestone owner if you have questions.
Owners: amineer@(Android), kariahda@(iOS), cindyb@(ChromeOS), govind@(Desktop)

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

Merge approved, M69.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/ad49e606dc08fe392262343fa5f387260395fac7

commit ad49e606dc08fe392262343fa5f387260395fac7
Author: Weidong Guo <weidongg@chromium.org>
Date: Tue Sep 11 16:44:58 2018

Fix app list jump issue in M69

The fix is originally in go/cgcl/1147329 in M70, but that CL is big and
risky to merged back.

Bug:  882030 
Change-Id: I80d8a4dafed46961be250bee2e26e415474c2e51
Reviewed-on: https://chromium-review.googlesource.com/1217761
Reviewed-by: Alex Newcomer <newcomer@chromium.org>
Cr-Commit-Position: refs/branch-heads/3497@{#924}
Cr-Branched-From: 271eaf50594eb818c9295dc78d364aea18c82ea8-refs/heads/master@{#576753}
[modify] https://crrev.com/ad49e606dc08fe392262343fa5f387260395fac7/ash/app_list/views/app_list_view.cc