[macOS 26] TestWebKitAPI.FontManagerTests.ChangeAttributesWithFontEffectsBox fails due to changes in NSFontPanel

[whsieh]

114e809

[macOS 26] TestWebKitAPI.FontManagerTests.ChangeAttributesWithFontEffectsBox fails due to changes in NSFontPanel
https://bugs.webkit.org/show_bug.cgi?id=301352
rdar://163133860

Reviewed by Aditya Keerthi.

Since macOS 26, parts of the `NSFontPanel` UI have been reimplemented in Swift, or otherwise changed
so that styling options are now behind popovers and menus. As a result, all of the popup buttons
previously found by looking for `NSFontPanel*ToolbarItem` no longer exist.

This test currently tries (and fails) to interact with these nonexistent controls. Fix this by
changing how these tests work, such that they directly change the `_attributesToAdd` and
`_attributesToRemove` ivars that determine which text styles should be applied when calling into
`-changeAttributes:`.

* Tools/TestWebKitAPI/Tests/TestWebKitAPI/mac/AppKitSPI.h:
* Tools/TestWebKitAPI/Tests/mac/FontManagerTests.mm:
(TestWebKitAPI::TEST(FontManagerTests, ChangeAttributesWithFontEffectsBox)):
* Tools/TestWebKitAPI/mac/NSFontPanelTesting.h:
* Tools/TestWebKitAPI/mac/NSFontPanelTesting.mm:
(-[NSBox _addAttribute:value:]):
(-[NSBox _removeAttribute:]):
(-[NSBox _clearAttributes]):

Add helpers to directly add or remove text styling attributes.

(-[NSFontPanel fontEffectsBox]):
(-[NSFontPanel setUnderlineStyle:]):
(-[NSFontPanel setStrikethroughStyle:]):
(-[NSFontPanel setTextShadow:]):
(-[NSFontPanel commitAttributeChanges]):
(findMenuItemWithTitle): Deleted.
(-[NSFontPanel chooseUnderlineMenuItemWithTitle:]): Deleted.
(-[NSFontPanel chooseStrikeThroughMenuItemWithTitle:]): Deleted.
(-[NSFontPanel toggleShadow]): Deleted.

Canonical link: https://commits.webkit.org/302033@main

eb2286e

Misc	iOS, visionOS, tvOS & watchOS	macOS	Linux	Windows	Apple Internal
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	✅ 🛠 win	✅ 🛠 ios-apple
✅ 🧪 bindings	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🧪 wpe-wk2	❌ 🧪 win-tests	✅ 🛠 mac-apple
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🧪 api-mac	❌ 🧪 api-wpe		✅ 🛠 vision-apple
	🧪 ios-wk2-wpt	✅ 🧪 mac-wk1	✅ 🛠 wpe-cairo
	✅ 🧪 api-ios	✅ 🧪 mac-wk2	✅ 🛠 gtk
	✅ 🛠 vision	✅ 🧪 mac-AS-debug-wk2	✅ 🧪 gtk-wk2
	✅ 🛠 vision-sim	✅ 🧪 mac-wk2-stress	✅ 🧪 api-gtk
✅ 🛠 🧪 merge	✅ 🧪 vision-wk2	✅ 🧪 mac-intel-wk2	✅ 🛠 playstation
	✅ 🛠 tv		⏳ 🛠 jsc-armv7
	✅ 🛠 tv-sim		⏳ 🧪 jsc-armv7-tests
	✅ 🛠 watch
	✅ 🛠 watch-sim

[webkit-early-warning-system]

EWS run on current version of this PR (hash eb2286e)

Details

Misc	iOS, visionOS, tvOS & watchOS	macOS	Linux	Windows	Apple Internal
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	✅ 🛠 win	✅ 🛠 ios-apple
✅ 🧪 bindings	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🧪 wpe-wk2	❌ 🧪 win-tests	✅ 🛠 mac-apple
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🧪 api-mac	❌ 🧪 api-wpe		✅ 🛠 vision-apple
	🧪 ios-wk2-wpt	✅ 🧪 mac-wk1	✅ 🛠 wpe-cairo
	✅ 🧪 api-ios	✅ 🧪 mac-wk2	✅ 🛠 gtk
	✅ 🛠 vision	✅ 🧪 mac-AS-debug-wk2	✅ 🧪 gtk-wk2
	✅ 🛠 vision-sim	✅ 🧪 mac-wk2-stress	✅ 🧪 api-gtk
✅ 🛠 🧪 merge	✅ 🧪 vision-wk2	✅ 🧪 mac-intel-wk2	✅ 🛠 playstation
	✅ 🛠 tv		⏳ 🛠 jsc-armv7
	✅ 🛠 tv-sim		⏳ 🧪 jsc-armv7-tests
	✅ 🛠 watch
	✅ 🛠 watch-sim

[whsieh]

Thanks for the review!

[webkit-commit-queue]

Committed 302033@main (114e809): https://commits.webkit.org/302033@main

Reviewed commits have been landed. Closing PR #52886 and removing active labels.