The HTML fast parser may not parse HTML entities correctly

[cdumez]

609c58e

The HTML fast parser may not parse HTML entities correctly
https://bugs.webkit.org/show_bug.cgi?id=254370

Reviewed by Ryosuke Niwa.

The code was assuming consumeHTMLEntity() consumes all the input, which is not
necessarily the case. This fixes cases where the reference is only part of the
text.

This is a cherry-pick from Blink:
- https://chromium-review.googlesource.com/c/chromium/src/+/4305159

* LayoutTests/fast/parser/fast-html-parser-consume-entity-expected.txt: Added.
* LayoutTests/fast/parser/fast-html-parser-consume-entity.html: Added.
* Source/WebCore/html/parser/HTMLDocumentParserFastPath.cpp:
(WebCore::HTMLFastPathParser::scanHTMLCharacterReference):

Canonical link: https://commits.webkit.org/262050@main

eb44a9e

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-early-warning-system]

EWS run on current version of this PR (hash eb44a9e)

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 262050@main (609c58e): https://commits.webkit.org/262050@main

Reviewed commits have been landed. Closing PR #11888 and removing active labels.