commit b37a4c8219404240614ef11bb1ef25aeaed488ac
author Victor Tan <victortan@chromium.org> Thu Jun 08 16:18:28 2023
committer Chromium LUCI CQ <chromium-scoped@luci-project-accounts.iam.gserviceaccount.com> Thu Jun 08 16:18:28 2023
tree 49ada302169424daf8dfa5662079d5fdf0c36024
parent 9e192b57aec12a7142c39034e7e7b85947fb125d

Remove OT client hints and UA reduction OT for embed requests

In order to enabled the UA Reduction/Deprecation origin trial for embed requests (both first-party and third-party), we introduced two client hints: Sec-CH-UA-Reduced/Sec-CH-UA-Full. We accomplished this by persisting Sec-CH-UA-Reduced/Sec-CH-UA-Full from an embed response headers if a valid Origin Trial token is present.

As we completed the UA reduction origin trials, Sec-CH-UA-Reduced and Sec-CH-UA-Full are no longer be persisted in any context, they should be removed and be simplified. For all future similar origin trials, we prefer to use Persistent Origin Trials.

This CL remove the two origin trial client hints: Sec-CH-UA-Reduced and Sec-CH-UA-Full and simplify the client hints logics when parsing
ACCEPT-CH headers. It also refactors corresponding tests to make the user-agent reduction behavior depending on the UA reduction phases' features.


The following up cls will:
 * Remove UA reduction origin trial for service worker
 * Remove UA reduction origin trial for all requests

Change-Id: I474122a36ec633d5589e8dfc5f11f31916a40863
Bug: 1258063
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4551662
Reviewed-by: Ari Chivukula <arichiv@chromium.org>
Reviewed-by: Bo Liu <boliu@chromium.org>
Reviewed-by: Colin Blundell <blundell@chromium.org>
Commit-Queue: Victor Tan <victortan@chromium.org>
Reviewed-by: Arthur Sonzogni <arthursonzogni@chromium.org>
Reviewed-by: Luc Nguyen <lucnguyen@google.com>
Reviewed-by: Yoav Weiss <yoavweiss@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1154936}