The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/e5a1e98b7c79f9ee81bd9aa28762394073dc1c60

commit e5a1e98b7c79f9ee81bd9aa28762394073dc1c60
Author: Greg Thompson <grt@chromium.org>
Date: Wed Aug 08 11:37:53 2018

Do not show relaunch notifications early on dev and canary.

Previously, the UpgradeDetector notified observers that the "low"
annoyance level had been reached after only one hour for canary and dev
channels (the so-called "unstable" channels). This was to entice users
of such to relaunch earlier than is the case for beta and stable (the
so-called "stable" channels). This is all well and good for the color
changes to the app menu, but is a bit too aggressive when it also
triggers the relaunch recommended bubble or the relaunch required
dialog.

This change makes the relaunch notifications follow the beta and stable
schedule for all channels. This is accomplished by the following
modifications:

- A new "very low" annoyance level has been introduced to the
  UpgradeDetector's "update avisory system". This fires for desktop
  Chrome one hour after an update is detected. It is unused on Chrome
  OS, where the "low" annoyance level is fired the moment an update is
  detected.

- There is no longer any notion of "unstable" channels in the desktop
  implementation of UpgradeDetector (UpgradeDetectorImpl), so "very low"
  is always issued after one hour, and "low" is always issued after two
  days (again, desktop Chrome only; barring use of the
  RelaunchNotificationPeriod policy setting).

- AppMenuIconController now takes care of updating the menu when it
  observes "very low" or "low" based on Chrome's channel.

BUG= 869757 

Change-Id: I1deef28b3986de239df00fe1e806d4404f28fd11
Reviewed-on: https://chromium-review.googlesource.com/1162162
Commit-Queue: Greg Thompson <grt@chromium.org>
Reviewed-by: Brian White <bcwhite@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Sadrul Chowdhury <sadrul@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Reviewed-by: Peter Kasting <pkasting@chromium.org>
Cr-Commit-Position: refs/heads/master@{#581520}
[modify] https://crrev.com/e5a1e98b7c79f9ee81bd9aa28762394073dc1c60/ash/public/interfaces/update.mojom
[modify] https://crrev.com/e5a1e98b7c79f9ee81bd9aa28762394073dc1c60/ash/system/update/tray_update.cc
[modify] https://crrev.com/e5a1e98b7c79f9ee81bd9aa28762394073dc1c60/chrome/browser/metrics/upgrade_metrics_provider.cc
[modify] https://crrev.com/e5a1e98b7c79f9ee81bd9aa28762394073dc1c60/chrome/browser/metrics/upgrade_metrics_provider.h
[modify] https://crrev.com/e5a1e98b7c79f9ee81bd9aa28762394073dc1c60/chrome/browser/metrics/upgrade_metrics_provider_unittest.cc
[modify] https://crrev.com/e5a1e98b7c79f9ee81bd9aa28762394073dc1c60/chrome/browser/ui/ash/system_tray_client.cc
[modify] https://crrev.com/e5a1e98b7c79f9ee81bd9aa28762394073dc1c60/chrome/browser/ui/toolbar/app_menu_icon_controller.cc
[modify] https://crrev.com/e5a1e98b7c79f9ee81bd9aa28762394073dc1c60/chrome/browser/ui/toolbar/app_menu_icon_controller.h
[modify] https://crrev.com/e5a1e98b7c79f9ee81bd9aa28762394073dc1c60/chrome/browser/ui/views/relaunch_notification/relaunch_notification_controller.cc
[modify] https://crrev.com/e5a1e98b7c79f9ee81bd9aa28762394073dc1c60/chrome/browser/ui/views/relaunch_notification/relaunch_notification_controller.h
[modify] https://crrev.com/e5a1e98b7c79f9ee81bd9aa28762394073dc1c60/chrome/browser/ui/views/relaunch_notification/relaunch_notification_controller_unittest.cc
[modify] https://crrev.com/e5a1e98b7c79f9ee81bd9aa28762394073dc1c60/chrome/browser/upgrade_detector.cc
[modify] https://crrev.com/e5a1e98b7c79f9ee81bd9aa28762394073dc1c60/chrome/browser/upgrade_detector.h
[modify] https://crrev.com/e5a1e98b7c79f9ee81bd9aa28762394073dc1c60/chrome/browser/upgrade_detector_impl.cc
[modify] https://crrev.com/e5a1e98b7c79f9ee81bd9aa28762394073dc1c60/chrome/browser/upgrade_detector_impl.h
[modify] https://crrev.com/e5a1e98b7c79f9ee81bd9aa28762394073dc1c60/chrome/browser/upgrade_detector_impl_unittest.cc
[modify] https://crrev.com/e5a1e98b7c79f9ee81bd9aa28762394073dc1c60/tools/metrics/histograms/enums.xml