Remove the unnecessary HDRMediaCapabilitiesEnabled feature flag

[brentfulgham]

49dfaed

Remove the unnecessary HDRMediaCapabilitiesEnabled feature flag
https://bugs.webkit.org/show_bug.cgi?id=248436
<rdar://problem/102738537>

Reviewed by Eric Carlson.

Modern WebKit always enables HDRMediaCapabilitiesEnabled, and we no longer need
to toggle this option for A/B testing. We should remove it to reduce the cluttered
set of experimental features.

* LayoutTests/fast/media/mq-highdynamicrange-live-update.html: Remove call to set the
removed enablement flag. No change in behavior since the flag was always turned on,
and the feature is now always enabled.
* LayoutTests/media/mediacapabilities/mock-decodingInfo-hdr-expected.txt: Ditto.
* LayoutTests/media/mediacapabilities/mock-decodingInfo-hdr.html: Ditto.
* LayoutTests/platform/mac/media/mediacapabilities/hevc-decodingInfo-hdr-expected.txt: Ditto.
* LayoutTests/platform/mac/media/mediacapabilities/hevc-decodingInfo-hdr.html: Ditto.
* Source/WTF/Scripts/Preferences/WebPreferencesExperimental.yaml:
* Source/WebCore/Modules/mediacapabilities/VideoConfiguration.idl:
* Source/WebCore/css/LegacyMediaQueryEvaluator.cpp:
(WebCore::dynamicRangeEvaluate):
* Source/WebCore/css/query/MediaQueryFeatures.cpp:
(WebCore::MQ::Features::dynamicRange):

Canonical link: https://commits.webkit.org/257200@main

a4ba1dc

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	✅ 🛠 🧪 win
✅ 🧪 bindings	✅ 🛠 ios-sim	✅ 🛠 mac-debug	✅ 🛠 gtk	💥 🛠 wincairo
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🛠 mac-AS-debug	✅ 🧪 gtk-wk2
	✅ 🧪 api-ios	✅ 🧪 api-mac	🧪 api-gtk
✅ 🛠 🧪 jsc	✅ 🛠 tv	🧪 mac-wk1	✅ 🛠 jsc-armv7
	✅ 🛠 tv-sim	✅ 🧪 mac-wk2	✅ 🧪 jsc-armv7-tests
✅ 🛠 🧪 merge	✅ 🛠 watch	❌ 🧪 mac-AS-debug-wk2	✅ 🛠 jsc-mips
	✅ 🛠 watch-sim	✅ 🧪 mac-wk2-stress	✅ 🧪 jsc-mips-tests

[webkit-early-warning-system]

EWS run on previous version of this PR (hash 7540165)

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	✅ 🛠 🧪 win
✅ 🧪 bindings	✅ 🛠 ios-sim	✅ 🛠 mac-debug	✅ 🛠 gtk	✅ 🛠 wincairo
✅ 🧪 webkitperl	❌ 🧪 ios-wk2	✅ 🛠 mac-AS-debug	✅ 🧪 gtk-wk2
	✅ 🧪 api-ios	✅ 🧪 api-mac	🧪 api-gtk
✅ 🛠 🧪 jsc	✅ 🛠 tv	🧪 mac-wk1	✅ 🛠 jsc-armv7
	✅ 🛠 tv-sim	🧪 mac-wk2	✅ 🧪 jsc-armv7-tests
	✅ 🛠 watch	🧪 mac-AS-debug-wk2	✅ 🛠 jsc-mips
	✅ 🛠 watch-sim	✅ 🧪 mac-wk2-stress	✅ 🧪 jsc-mips-tests

[eric-carlson]

r=me

[webkit-early-warning-system]

EWS run on current version of this PR (hash a4ba1dc)

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	✅ 🛠 🧪 win
✅ 🧪 bindings	✅ 🛠 ios-sim	✅ 🛠 mac-debug	✅ 🛠 gtk	💥 🛠 wincairo
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🛠 mac-AS-debug	✅ 🧪 gtk-wk2
	✅ 🧪 api-ios	✅ 🧪 api-mac	🧪 api-gtk
✅ 🛠 🧪 jsc	✅ 🛠 tv	🧪 mac-wk1	✅ 🛠 jsc-armv7
	✅ 🛠 tv-sim	✅ 🧪 mac-wk2	✅ 🧪 jsc-armv7-tests
✅ 🛠 🧪 merge	✅ 🛠 watch	❌ 🧪 mac-AS-debug-wk2	✅ 🛠 jsc-mips
	✅ 🛠 watch-sim	✅ 🧪 mac-wk2-stress	✅ 🧪 jsc-mips-tests

[brentfulgham]

I am unable to reproduce the crash in Mac-AS-debug-wk2 on my M1 Pro machine. I've run the directory in a loop a few dozen times (in debug build), and a set of image tests in a loop 100's of times without seeing a crash.

Since the bot does not capture a crash trace, I'm going to proceed with landing and watch the bots.

[webkit-commit-queue]

Committed 257200@main (49dfaed): https://commits.webkit.org/257200@main

Reviewed commits have been landed. Closing PR #6900 and removing active labels.