Automated tests for the below commit have been missing. Would it be possible to add test coverage to avoid regressions in future?

CL: 
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https://chromium.googlesource.com/chromium/src/+/fd1a229953c88865883c118bbd4e446d4c88b2a7

Ref Bug: 
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https://bugs.chromium.org/p/chromium/issues/detail?id=466083

Thank you.