commit 36ba217c0f1808e1b72be2798a50f0e815fc1a9e
author Xinyi Ji <xinyiji@google.com> Fri Jan 10 21:08:16 2025
committer Chromium LUCI CQ <chromium-scoped@luci-project-accounts.iam.gserviceaccount.com> Fri Jan 10 21:08:16 2025
tree e6e8a8e77a19ce575ca1652c86a4669784a8eedc
parent d452131e99c0576c9cceb8b7d5e44047c0e049d0

[EducationalTip] Implement trigger scenarios for quick delete promo card

This CL implements the trigger scenarios for the quick delete promo
card:

1. The quick delete promo card in the educational tip module only
appears when a user clears their history without using the Quick Delete
feature or never clears their history in the past 30 days. Two signals,
"count_of_clearing_browsing_data" and
"count_of_clearing_browsing_data_through_quick_delete," track this. The
signals' values are the logging times of the
"Privacy.DeleteBrowsingData.Action" histogram with different enums.


2.The quick delete promo card in the educational tip module will only
appear if it has not been shown to the user in more than 10 total
sessions. A session is defined as each time Chrome is launched. If the
promo card is displayed for the first time in the session, the
preference flag "ephemeral_pref_counter.quick_delete_promo_counter" is
incremented to register one impression.

3. If the user clicks on the quick delete promo card, it will be
permanently disabled. A new preference flag,
"ephemeral_pref_interacted.quick_delete_promo_interacted", is introduced
to track user interaction with the card. Once the card is clicked, the
flag is set to true, and the promo card will no longer be displayed.

4. The quick delete promo card in the educational tip module will appear
only when the card has not been displayed to the user more than 3 times
in 24 hours. To support this, a signal called "quick_delete_shown_count"
and the uma histogram
"MagicStack.Clank.NewTabPage.Module.TopImpressionV2" are introduced to
handle this criteria.

Bug: 355015904
Change-Id: Ied7871863fcb6616effd1b131a5a61c3daaa3075
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6129129
Reviewed-by: Xi Han <hanxi@chromium.org>
Reviewed-by: Siddhartha S <ssid@chromium.org>
Commit-Queue: Xinyi Ji <xinyiji@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1404975}