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

CL: https://chromium.googlesource.com/chromium/src.git/+/66e6a51773c74189058e55c8b7e63353b4f469f8

Ref Bug: https://bugs.chromium.org/p/chromium/issues/detail?id=708475

Thank you!