The fix seems low risk and impacts metrics.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/50a84a885d0a54cfb1b72884ea9a1bfc5ec7ad81

commit 50a84a885d0a54cfb1b72884ea9a1bfc5ec7ad81
Author: Gauthier Ambard <gambard@chromium.org>
Date: Wed Dec 19 08:45:23 2018

[iOS] Fix ShareMenu metrics

This CL fixes the reporting the metrics of the share menu.
Previously GOOGLE_UNKNOWN was taking precedence over the ReadLater
and RequestDesktopMobile.
It also adds a metrics when the user is cancelling the share menu.

Bug:  915654 
Change-Id: Ief8580866f16ce3ce68c3f197bf1a013ff0bd282
Reviewed-on: https://chromium-review.googlesource.com/c/1379895
Reviewed-by: Ilya Sherman <isherman@chromium.org>
Reviewed-by: Peter Lee <pkl@chromium.org>
Commit-Queue: Gauthier Ambard <gambard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#617770}
[modify] https://crrev.com/50a84a885d0a54cfb1b72884ea9a1bfc5ec7ad81/ios/chrome/browser/ui/activity_services/activity_service_controller.mm
[modify] https://crrev.com/50a84a885d0a54cfb1b72884ea9a1bfc5ec7ad81/ios/chrome/browser/ui/activity_services/activity_type_util.mm
[modify] https://crrev.com/50a84a885d0a54cfb1b72884ea9a1bfc5ec7ad81/tools/metrics/actions/actions.xml

Asking for merge request. This is only fixing the way metrics are collected so it is low risk. It is also hard to test on canary as there is no user visible changes.

This bug requires manual review: M72 has already been promoted to the beta branch, so this requires manual review
Please contact the milestone owner if you have questions.
Owners: govind@(Android), kariahda@(iOS), djmm@(ChromeOS), abdulsyed@(Desktop)

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

Approved. Please merge asap.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/8e595abb3b366e5df1d5b4b8ed2f4c384a66abff

commit 8e595abb3b366e5df1d5b4b8ed2f4c384a66abff
Author: Gauthier Ambard <gambard@chromium.org>
Date: Mon Jan 07 10:35:25 2019

[iOS] Fix ShareMenu metrics

This CL fixes the reporting the metrics of the share menu.
Previously GOOGLE_UNKNOWN was taking precedence over the ReadLater
and RequestDesktopMobile.
It also adds a metrics when the user is cancelling the share menu.

Bug:  915654 
Change-Id: Ief8580866f16ce3ce68c3f197bf1a013ff0bd282
Reviewed-on: https://chromium-review.googlesource.com/c/1379895
Reviewed-by: Ilya Sherman <isherman@chromium.org>
Reviewed-by: Peter Lee <pkl@chromium.org>
Commit-Queue: Gauthier Ambard <gambard@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#617770}(cherry picked from commit 50a84a885d0a54cfb1b72884ea9a1bfc5ec7ad81)
Reviewed-on: https://chromium-review.googlesource.com/c/1397630
Reviewed-by: Gauthier Ambard <gambard@chromium.org>
Cr-Commit-Position: refs/branch-heads/3626@{#582}
Cr-Branched-From: d897fb137fbaaa9355c0c93124cc048824eb1e65-refs/heads/master@{#612437}
[modify] https://crrev.com/8e595abb3b366e5df1d5b4b8ed2f4c384a66abff/ios/chrome/browser/ui/activity_services/activity_service_controller.mm
[modify] https://crrev.com/8e595abb3b366e5df1d5b4b8ed2f4c384a66abff/ios/chrome/browser/ui/activity_services/activity_type_util.mm
[modify] https://crrev.com/8e595abb3b366e5df1d5b4b8ed2f4c384a66abff/tools/metrics/actions/actions.xml

The following revision refers to this bug: 
https://chromium.googlesource.com/chromium/src.git/+/8e595abb3b366e5df1d5b4b8ed2f4c384a66abff

Commit: 8e595abb3b366e5df1d5b4b8ed2f4c384a66abff
Author: gambard@chromium.org
Commiter: gambard@chromium.org
Date: 2019-01-07 10:35:25 +0000 UTC

[iOS] Fix ShareMenu metrics

This CL fixes the reporting the metrics of the share menu.
Previously GOOGLE_UNKNOWN was taking precedence over the ReadLater
and RequestDesktopMobile.
It also adds a metrics when the user is cancelling the share menu.

Bug:  915654 
Change-Id: Ief8580866f16ce3ce68c3f197bf1a013ff0bd282
Reviewed-on: https://chromium-review.googlesource.com/c/1379895
Reviewed-by: Ilya Sherman <isherman@chromium.org>
Reviewed-by: Peter Lee <pkl@chromium.org>
Commit-Queue: Gauthier Ambard <gambard@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#617770}(cherry picked from commit 50a84a885d0a54cfb1b72884ea9a1bfc5ec7ad81)
Reviewed-on: https://chromium-review.googlesource.com/c/1397630
Reviewed-by: Gauthier Ambard <gambard@chromium.org>
Cr-Commit-Position: refs/branch-heads/3626@{#582}
Cr-Branched-From: d897fb137fbaaa9355c0c93124cc048824eb1e65-refs/heads/master@{#612437}