Permissions-Policy: gamepad - probably experimental

[hamishwillee]

Permissions-Policy: gamepad appears to have been removed in #23470 for the reasons given in #23470 (comment)

The data is definitely wierd and needs to be looked at again.

Specifically,

• That issues says the permission was added in 62, but in my PR of Firefox 91 gamepad permission policy #11770 it went in at 86 behind a preference.
• The comment is that the feature was only supported "on the allow iframe attribute" based on a note that applied only to FF, so would not affect Chrome.
• Chrome indicate it was shipped in 103 but I can't find confirmation https://chromium-review.googlesource.com/c/chromium/src/+/3566388
• Safari asserts to have supported this in tech preview 186 https://webkit.org/blog/14916/release-notes-for-safari-technology-preview-186/ but I can't see it in https://webkit.org/blog/14205/news-from-wwdc23-webkit-features-in-safari-17-beta/
• Not supported in FF, because FF only supports Feature-Policy

@marcoscaceres Do you know if this actually did release in Chrome/Safari, and if so, in what versions

This falls out of the post mdn/content#42544

[hamishwillee]

Probably 103 according to https://chromium-review.googlesource.com/c/chromium/src/+/3566388

Suggested change

	"version_added": "86",
	"flags": [
	{
	"type": "preference",
	"name": "#restrict-gamepad-access",
	"value_to_set": "Enabled"
	}
	]
	"version_added": "103"

[github-actions]

Tip: Review these changes grouped by change (recommended for most PRs), or grouped by feature (for large PRs).

[hamishwillee]

Maybe 17.4 according to https://webkit.org/blog/14916/release-notes-for-safari-technology-preview-186/ (and assuming it then went into what I believe is the corresponding release)

Suggested change

	"version_added": false
	"version_added": "17.4"

[bban160]

FYI @hamishwillee, I am planning to eventually comb through the Permissions Policy compatibility data alongside the docs updates (mdn/content#42534). At a minimum, there are currently many omissions, and I think some features inadvertently got lost in the conversion from Feature Policy to Permissions Policy.

(Sorry for not noticing this PR until you were already on vacation)