Automated tests for the below commit have been missing.Please add test coverage ASAP to avoid regressions in future.

CL: 
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https://chromium.googlesource.com/chromium/src.git/+/426e47187f129a742e3c38200b4ff071e861e262

Ref Bug: 
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https://bugs.chromium.org/p/chromium/issues/detail?id=771987

Thank you...!!