Updates for Chrome 155 beta

[Elchi3]

The https://collector.openwebdocs.org/ project (v10.20.11) found new features shipping in Chromium 155 beta which was released this week. Currently, the collector covers about 90% of BCD, so the following list might not be exhaustive. Also, if a feature is in Canary/behind flags, it is not considered here. If a feature is missing, one reason can be that the IDL is not yet in a specification or in webref.

Chrome 155 stable releases on October 6, 2026. This PR needs to be merged before/with the BCD release on October 1, 2026.

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With this PR, BCD will consider the following features as shipping in Chromium 155:

Modern Crypto algos, https://chromestatus.com/feature/5198951632470016

• api.SubtleCrypto.decapsulateBits
• api.SubtleCrypto.decapsulateKey
• api.SubtleCrypto.encapsulateBits
• api.SubtleCrypto.encapsulateKey
• api.SubtleCrypto.getPublicKey
• api.SubtleCrypto.supports_static

CSS symbols(), https://chromestatus.com/feature/5146996093616128

• css.properties.list-style-type.symbols
• css.properties.list-style.symbols

CSS margin-trim, https://chromestatus.com/feature/5197863732772864

• css.properties.margin-trim
• css.properties.margin-trim.block
• css.properties.margin-trim.block-end
• css.properties.margin-trim.block-start
• css.properties.margin-trim.none

CSS text-decoration-skip-spaces, https://chromestatus.com/feature/4832783806627840

• css.properties.text-decoration-skip-spaces
• css.properties.text-decoration-skip-spaces.all
• css.properties.text-decoration-skip-spaces.end
• css.properties.text-decoration-skip-spaces.none
• css.properties.text-decoration-skip-spaces.start

These two features are not tested by the Collector, I mark them as shipping in a separate commit.

• JPEG XL, https://chromestatus.com/feature/5114042131808256
• import text modules, https://chromestatus.com/feature/5191512456560640

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From what I can tell in the current 155 beta, these features are not included:

• HTML streaming methods, https://chromestatus.com/feature/5054329641893888
• WebTransport responseHeaders, https://chromestatus.com/feature/5194104408506368
• Window controls, https://chromestatus.com/feature/5201832664629248

See also https://developer.chrome.com/blog/chrome-155-beta and https://chromestatus.com/roadmap

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