Using the per-revision bisect providing the bisect results,
Good Build -- 58.0.3018.0 (revision : 451537)
Bad Build  -- 58.0.3019.0 (revision : 451676)

You are probably looking for a change made after 451671 (known good), but no later than 451672 (first known bad).
CHANGELOG URL:
  https://chromium.googlesource.com/chromium/src/+log/2cf716e4b8cecd7600fa3740a28fedb5269ab195..fb579cdb6aa334f44e57072a3c1fd803aa2cb082

Review URL -- https://codereview.chromium.org/2674883004

@tkent -- Could you please look into the issue, kindly re-assign if this is not related to your changes.
Assuming this might be an intentional change, please change the status to Won't Fix if it is intentional.
Thank You.

This is intentional behavior of Blink.

I'm not sure if this is acceptable in error pages.
Defer to edwardjung@, who introduced <abbr> to this message.
https://codereview.chromium.org/1583693005

Thanks for raising, my personal thought is this is acceptable as otherwise users have no way of knowing there is extra info here.

I'll double check with our visual designer on look and feel.

@bettes, what do you think of the abbreviation dotted line?

@bettes could you please respond to the comment #3.

Thank You...

Able to reproduce the issue on mac os 10.12.2 using chrome canary M59 #59.0.3046.0 .

@Could someone please provide us an update on this issue.

Thanks!

Communicated with bettes and it's working as intended. 

As mentioned previously in #3 if there isn't any styling, users don't know there is a tooltip there.

 Issue 705943  has been merged into this issue.