Maintain backwards compatibility with wire format from 4.3.0#629

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Nemikolh wants to merge 7 commits intoGoogleChromeLabs:mainfrom Nemikolh:compat-4.3.0

+326-33

Commits on Mar 6, 2023

Maintain backwards compatibility with wire format from 4.3.0
Nemikolh
committed

Commits on Mar 7, 2023

Commits on Mar 8, 2023

Refactor V430* to Legacy* and isV430 to isLegacy
Nemikolh
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Commits on Mar 9, 2023

Simplify markLegacyPort logic and only mark them when needed
Nemikolh
committed

Commits on Mar 12, 2023

Add traversal as it's more useful than anticipated
Nemikolh
committed