Issue 757018  has been merged into this issue.

Context menu trigger by touch was disabled when we assigned "toggle select" to the long-tap gesture, which had also been assigned to bring-up the context menu. But I agree that two-fingers tap should work like before.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/1a7a344eb3dd04ddf530161e8ddd1faff3d09e7b

commit 1a7a344eb3dd04ddf530161e8ddd1faff3d09e7b
Author: Tatsuhisa Yamaguchi <yamaguchi@chromium.org>
Date: Wed Aug 23 06:23:07 2017

Enable opening context menu by two-finger tap.

The context menu has once disabled by 606068 when we assigned long-tap
to enter the selection mode.

Bug:  755757 
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: I282901d190e63c264eb6238abd34bf0cff107a66
Reviewed-on: https://chromium-review.googlesource.com/625506
Reviewed-by: Naoki Fukino <fukino@chromium.org>
Commit-Queue: Tatsuhisa Yamaguchi <yamaguchi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#496599}
[modify] https://crrev.com/1a7a344eb3dd04ddf530161e8ddd1faff3d09e7b/ui/file_manager/file_manager/foreground/js/ui/file_tap_handler.js
[modify] https://crrev.com/1a7a344eb3dd04ddf530161e8ddd1faff3d09e7b/ui/file_manager/file_manager/foreground/js/ui/list_container.js

This bug requires manual review: We are only 12 days from stable.
Please contact the milestone owner if you have questions.
Owners: amineer@(Android), cmasso@(iOS), ketakid@(ChromeOS), govind@(Desktop)

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

Approving merge to M61 Chrome OS.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/7003411f619e1381d65c6455c3574f448c1a66e2

commit 7003411f619e1381d65c6455c3574f448c1a66e2
Author: Tatsuhisa Yamaguchi <yamaguchi@chromium.org>
Date: Fri Aug 25 03:17:12 2017

Enable opening context menu by two-finger tap.

The context menu has once disabled by 606068 when we assigned long-tap
to enter the selection mode.

TBR=yamaguchi@chromium.org

(cherry picked from commit 1a7a344eb3dd04ddf530161e8ddd1faff3d09e7b)

Bug:  755757 
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: I282901d190e63c264eb6238abd34bf0cff107a66
Reviewed-on: https://chromium-review.googlesource.com/625506
Reviewed-by: Naoki Fukino <fukino@chromium.org>
Commit-Queue: Tatsuhisa Yamaguchi <yamaguchi@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#496599}
Reviewed-on: https://chromium-review.googlesource.com/633968
Reviewed-by: Tatsuhisa Yamaguchi <yamaguchi@chromium.org>
Cr-Commit-Position: refs/branch-heads/3163@{#871}
Cr-Branched-From: ff259bab28b35d242e10186cd63af7ed404fae0d-refs/heads/master@{#488528}
[modify] https://crrev.com/7003411f619e1381d65c6455c3574f448c1a66e2/ui/file_manager/file_manager/foreground/js/ui/file_tap_handler.js
[modify] https://crrev.com/7003411f619e1381d65c6455c3574f448c1a66e2/ui/file_manager/file_manager/foreground/js/ui/list_container.js

9901.66.0, 62.0.3202.82 stable