Chrome Version       : 69.0.3444.0
OS Version: OS X 10.13.4

What steps will reproduce the problem?
1. MouseDown on the profile switcher button and hold

What is the expected result?

Popup has a shadow.

What happens instead of that?

It doesn't get a shadow until mouse release.


Other bubbles - bookmark bubble, etc. are not affected. Seems to just be the profile switcher :/


Bisected to
You are probably looking for a change made after 550418 (known good), but no later than 550433 (first known bad).
CHANGELOG URL:
  https://chromium.googlesource.com/chromium/src/+log/34eeb9e1f4b7345ffac7788d9c22054190693c12..1b363a6abf4cba3870aaa47a9b44476edad5226b

likely

r9d18ebb6 Delete an (expensive) unused code path to draw window backgrounds. by Sidney San Martín · 7 weeks ago r550429


I only started noticing this after upgrading to 10.13.4, but I've been doing a lot of CrOS lately, so that could be a red herring.