Related http://crbug.com/842291
The Chromium change in http://crrev.com/76c3965de85bcd28a57293cef653a88cbb6061af committed directly to trunk and it appears the changes missed the M68 show.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/7dd74b25b4a16a1dc60e71ad4232cd546e69c163

commit 7dd74b25b4a16a1dc60e71ad4232cd546e69c163
Author: Robert Liao <robliao@chromium.org>
Date: Fri Aug 17 03:19:06 2018

Forward Port M67 Disable Touchable UI by Default Except on Tablets

BUG=842291, 875122 
TBR=kylixrd@chromium.org,sky@chromium.org

Change-Id: Ieef37d1c681f109c41ef2451ed68f341b59531b1
Reviewed-on: https://chromium-review.googlesource.com/1066803
Cr-Original-Commit-Position: refs/branch-heads/3396@{#660}
Cr-Original-Branched-From: 9ef2aa869bc7bc0c089e255d698cca6e47d6b038-refs/heads/master@{#550428}(cherry picked from commit 76c3965de85bcd28a57293cef653a88cbb6061af)
Reviewed-on: https://chromium-review.googlesource.com/1179341
Reviewed-by: Robert Liao <robliao@chromium.org>
Commit-Queue: Robert Liao <robliao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#583952}
[modify] https://crrev.com/7dd74b25b4a16a1dc60e71ad4232cd546e69c163/ui/base/material_design/material_design_controller.cc

[Auto-generated comment by a script] We noticed that this issue is targeted for M-69; it appears the fix may have landed after branch point, meaning a merge might be required. Please confirm if a merge is required here - if so add Merge-Request-69 label, otherwise remove Merge-TBD label. Thanks.

Reopening for the merge. This is currently blocked on CrOS Canary validation, which hasn't made it as of this right.

ChromeOS Canary is lagging behind, so this was tested with a custom build of Chrome from ToT deployed to a ChromeOS device.

This bug requires manual review: We are only 13 days from stable.
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/+/aafbf0dd75c2b4d23095cec5ac2d58a14eed949d

commit aafbf0dd75c2b4d23095cec5ac2d58a14eed949d
Author: Robert Liao <robliao@chromium.org>
Date: Wed Aug 22 17:12:07 2018

Forward Port M67 Disable Touchable UI by Default Except on Tablets

BUG= 875122 
BUG=842291
TBR=kylixrd@chromium.org,sky@chromium.org

Change-Id: Ieef37d1c681f109c41ef2451ed68f341b59531b1
Reviewed-on: https://chromium-review.googlesource.com/1066803
Cr-Original-Original-Commit-Position: refs/branch-heads/3396@{#660}
Cr-Original-Original-Branched-From: 9ef2aa869bc7bc0c089e255d698cca6e47d6b038-refs/heads/master@{#550428}(cherry picked from commit 76c3965de85bcd28a57293cef653a88cbb6061af)
Reviewed-on: https://chromium-review.googlesource.com/1179341
Reviewed-by: Robert Liao <robliao@chromium.org>
Commit-Queue: Robert Liao <robliao@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#583952}(cherry picked from commit 7dd74b25b4a16a1dc60e71ad4232cd546e69c163)
Reviewed-on: https://chromium-review.googlesource.com/1185341
Cr-Commit-Position: refs/branch-heads/3497@{#769}
Cr-Branched-From: 271eaf50594eb818c9295dc78d364aea18c82ea8-refs/heads/master@{#576753}
[modify] https://crrev.com/aafbf0dd75c2b4d23095cec5ac2d58a14eed949d/ui/base/material_design/material_design_controller.cc