GitLab

This change implements the Set Storage Access command for TestDriver in
Blink and content_shell:
https://privacycg.github.io/storage-access/#automation

This is needed to support more in-depth WPT tests for the Storage
Access API. The current WPT tests for this feature cover basic IDL
behavior, but are not able to verify that the requestStorageAccess API
itself is functional because the browser must first be put into a state
where third-party cookies are blocked.

A new set_storage_access method has been added to testdriver.js. It
functions similarly to the existing set_permission method. This calls a
Blink-internal method that forwards the passed in arguments to the
content shell via Mojo. A new WebTestStorageAccessManager class in the
content shell converts the arguments into ContentSettingsPatterns and
passes these settings to the CookieManager. The
WebTestStorageAccessManager also enables third-party cookie blocking so
that these rules will take effect.

Bug: 1096803
Change-Id: I635687e7d00cf95fa2cf54fb86e1f65a0fe85f3f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2253280Reviewed-by: Martin Šrámek <msramek@chromium.org>
Reviewed-by: Mike West <mkwst@chromium.org>
Commit-Queue: Brandon Walderman <brwalder@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#790441}