we will also be able to properly deprecate the generic 'Sites' notification channel when the feature flag is gone.

The NextAction date has arrived: 2017-10-04

Updating NextAction date to one week after stable release of M62.

The NextAction date has arrived: 2017-10-24

Kill switch was just triggered for 62 so we should let this settle for another release or two.

Updating next action date accordingly.

The NextAction date has arrived: 2018-01-11

Hi Anita, please can you comment on whether the Kill switch was triggered after your comment of Nov 13th? If not, we can remove this flag and code now. Thanks!

Thanks for the ping.

Indeed the kill switch has not been triggered since #6 in either 63 or 64 so we can and should delete this code for 65+.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/ab5b237fab7d5fa83b50601ff58bd4c6eec94234

commit ab5b237fab7d5fa83b50601ff58bd4c6eec94234
Author: Anita Woodruff <awdf@chromium.org>
Date: Wed May 30 16:10:35 2018

[Android Notifications] Remove kill switch for site channels

- This feature flag enabled separate notification channels for
notifications from different origins on Android O. (It had no effect on
other platforms because notification channels only exist on Android O+).

- Since the feature flag has now been enabled by default for two beta
releases and one stable release (M63) with no reported issues, we can
be reasonably confident that we no longer require a kill switch for this
feature, so the flag and 'unmigration' code can now be removed.

Bug:  758553 
Change-Id: Icfacc58ed30db2c0ee7ad220411b5cf9af3c3237
Reviewed-on: https://chromium-review.googlesource.com/868654
Reviewed-by: Bernhard Bauer <bauerb@chromium.org>
Reviewed-by: Finnur Thorarinsson <finnur@chromium.org>
Reviewed-by: Peter Beverloo <peter@chromium.org>
Commit-Queue: Anita Woodruff <awdf@chromium.org>
Cr-Commit-Position: refs/heads/master@{#562858}
[modify] https://crrev.com/ab5b237fab7d5fa83b50601ff58bd4c6eec94234/chrome/android/java/src/org/chromium/chrome/browser/ChromeFeatureList.java
[modify] https://crrev.com/ab5b237fab7d5fa83b50601ff58bd4c6eec94234/chrome/android/java/src/org/chromium/chrome/browser/notifications/NotificationPlatformBridge.java
[modify] https://crrev.com/ab5b237fab7d5fa83b50601ff58bd4c6eec94234/chrome/android/java/src/org/chromium/chrome/browser/notifications/channels/ChannelDefinitions.java
[modify] https://crrev.com/ab5b237fab7d5fa83b50601ff58bd4c6eec94234/chrome/android/java/src/org/chromium/chrome/browser/notifications/channels/SiteChannelsManager.java
[modify] https://crrev.com/ab5b237fab7d5fa83b50601ff58bd4c6eec94234/chrome/android/java/src/org/chromium/chrome/browser/preferences/website/SingleWebsitePreferences.java
[modify] https://crrev.com/ab5b237fab7d5fa83b50601ff58bd4c6eec94234/chrome/android/javatests/src/org/chromium/chrome/browser/notifications/channels/ChannelsInitializerTest.java
[modify] https://crrev.com/ab5b237fab7d5fa83b50601ff58bd4c6eec94234/chrome/android/javatests/src/org/chromium/chrome/browser/notifications/channels/ChannelsUpdaterTest.java
[modify] https://crrev.com/ab5b237fab7d5fa83b50601ff58bd4c6eec94234/chrome/android/junit/src/org/chromium/chrome/browser/notifications/channels/ChannelDefinitionsTest.java
[modify] https://crrev.com/ab5b237fab7d5fa83b50601ff58bd4c6eec94234/chrome/browser/android/chrome_feature_list.cc
[modify] https://crrev.com/ab5b237fab7d5fa83b50601ff58bd4c6eec94234/chrome/browser/content_settings/host_content_settings_map_factory.cc
[modify] https://crrev.com/ab5b237fab7d5fa83b50601ff58bd4c6eec94234/chrome/browser/notifications/notification_channels_provider_android.cc
[modify] https://crrev.com/ab5b237fab7d5fa83b50601ff58bd4c6eec94234/chrome/browser/notifications/notification_channels_provider_android.h
[modify] https://crrev.com/ab5b237fab7d5fa83b50601ff58bd4c6eec94234/chrome/browser/notifications/notification_channels_provider_android_unittest.cc
[modify] https://crrev.com/ab5b237fab7d5fa83b50601ff58bd4c6eec94234/chrome/common/chrome_features.cc
[modify] https://crrev.com/ab5b237fab7d5fa83b50601ff58bd4c6eec94234/chrome/common/chrome_features.h