Simplify HTMLFastPathParser::scanEscapedAttributeValue()

[cdumez]

a740a0c

Simplify HTMLFastPathParser::scanEscapedAttributeValue()
https://bugs.webkit.org/show_bug.cgi?id=254929

Reviewed by Ryosuke Niwa.

Simplify HTMLFastPathParser::scanEscapedAttributeValue():
- Do an early return to avoid nesting
- Drop `result` & `start` variables as they were initialized but never used
- Merge 2 if conditions now that they're one after the other

* Source/WebCore/html/parser/HTMLDocumentParserFastPath.cpp:
(WebCore::HTMLFastPathParser::scanEscapedAttributeValue):

Canonical link: https://commits.webkit.org/262531@main

5d5d74e

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[webkit-early-warning-system]

EWS run on previous version of this PR (hash 3bc0f5d)

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	🛠 wpe	⏳ 🛠 wincairo
✅ 🧪 bindings	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	🧪 wpe-wk2
✅ 🧪 webkitperl	🧪 ios-wk2	🧪 api-mac	🛠 gtk
	🧪 api-ios	✅ 🧪 mac-wk1	🧪 gtk-wk2
⏳ 🛠 🧪 jsc	✅ 🛠 tv	🧪 mac-wk2	🧪 api-gtk
⏳ 🛠 🧪 jsc-arm64	⏳ 🛠 tv-sim	🧪 mac-AS-debug-wk2
	⏳ 🛠 watch	✅ 🧪 mac-wk2-stress
	✅ 🛠 watch-sim

[webkit-early-warning-system]

EWS run on previous version of this PR (hash 9bfc9fd)

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

[webkit-early-warning-system]

EWS run on previous version of this PR (hash ca37a88)

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

[webkit-early-warning-system]

EWS run on current version of this PR (hash 5d5d74e)

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

[webkit-commit-queue]

Committed 262531@main (a740a0c): https://commits.webkit.org/262531@main

Reviewed commits have been landed. Closing PR #12327 and removing active labels.