The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/4499180e9f242693e4daa81a3c0f4389d367f008

commit 4499180e9f242693e4daa81a3c0f4389d367f008
Author: Sammie Quon <sammiequon@google.com>
Date: Thu Sep 21 18:06:10 2017

cros: Add uma for back button and quick switch.

Bug:  767449 
Change-Id: I3523373d00a34eb42d955e5cf60c7ff4105fa7b5
Reviewed-on: https://chromium-review.googlesource.com/674087
Commit-Queue: Sammie Quon <sammiequon@chromium.org>
Reviewed-by: Ilya Sherman <isherman@chromium.org>
Reviewed-by: Mitsuru Oshima <oshima@chromium.org>
Cr-Commit-Position: refs/heads/master@{#503504}
[modify] https://crrev.com/4499180e9f242693e4daa81a3c0f4389d367f008/ash/shelf/app_list_button.cc
[modify] https://crrev.com/4499180e9f242693e4daa81a3c0f4389d367f008/ash/system/overview/overview_button_tray.cc
[modify] https://crrev.com/4499180e9f242693e4daa81a3c0f4389d367f008/tools/metrics/actions/actions.xml

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), bhthompson@(ChromeOS), abdulsyed@(Desktop)

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

Approved for 62. 

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/f8a5c71ee5eeed559e25653041856a79038850d2

commit f8a5c71ee5eeed559e25653041856a79038850d2
Author: Sammie Quon <sammiequon@google.com>
Date: Thu Oct 05 19:16:40 2017

[merge to 62] cros: Add uma for back button and quick switch.

TBR=sammiequon@google.com

(cherry picked from commit 4499180e9f242693e4daa81a3c0f4389d367f008)

TBR: oshima@chromium.org
Bug:  767449 
Change-Id: I3523373d00a34eb42d955e5cf60c7ff4105fa7b5
Reviewed-on: https://chromium-review.googlesource.com/674087
Commit-Queue: Sammie Quon <sammiequon@chromium.org>
Reviewed-by: Ilya Sherman <isherman@chromium.org>
Reviewed-by: Mitsuru Oshima <oshima@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#503504}
Reviewed-on: https://chromium-review.googlesource.com/703194
Reviewed-by: Sammie Quon <sammiequon@chromium.org>
Cr-Commit-Position: refs/branch-heads/3202@{#595}
Cr-Branched-From: fa6a5d87adff761bc16afc5498c3f5944c1daa68-refs/heads/master@{#499098}
[modify] https://crrev.com/f8a5c71ee5eeed559e25653041856a79038850d2/ash/shelf/app_list_button.cc
[modify] https://crrev.com/f8a5c71ee5eeed559e25653041856a79038850d2/ash/system/overview/overview_button_tray.cc
[modify] https://crrev.com/f8a5c71ee5eeed559e25653041856a79038850d2/tools/metrics/actions/actions.xml