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/+/07131e1caad858f9037fadc83a45a1894170d095

Ref Bug: 
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https://bugs.chromium.org/p/chromium/issues/detail?id=794572

calamity@ Could you please take a look in to it.

Thanks!