I remember this appearing, and I recall other contemporaneous threads asking how to make it go away, but I can't find the reference in the Chrome 55 release notes that this would show up: not in this friendly blog post [1], not in this release blog post [2], and the source control log [3] is still loading....

[1] https://developers.google.com/web/updates/2016/11/nic55 [2] https://chromereleases.googleblog.com/2016/12/stable-channel... [3] https://chromium.googlesource.com/chromium/src/+log/54.0.284...