Maybe this happened on Retina after fixing  issue 602393  for Non-Retina?

Thanks - that might be the case.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/90b73afb789c6a84ce25579c08bb4ac55164c768

commit 90b73afb789c6a84ce25579c08bb4ac55164c768
Author: shrike <shrike@chromium.org>
Date: Mon May 09 18:41:34 2016

[Mac][Material Design] Fix toolbar height on Retina.

A recent change to center the toolbar's buttons and textfield on
Retina displays throws them off-center on Retina when in Material
Design. This change bypasses the adjustment in this case.

Note that on Retina there is an odd number of pixels between the top
and bottom edges of the toolbar, which means that the location bar's
contents cannot be exactly centered. This is per spec (it also
occurs on ChromeOS).

Lastly, this cl makes the location bar shadow color transparent.

R=avi@chromium.org
BUG= 605140 

Review-Url: https://codereview.chromium.org/1948963002
Cr-Commit-Position: refs/heads/master@{#392379}

[modify] https://crrev.com/90b73afb789c6a84ce25579c08bb4ac55164c768/chrome/browser/ui/cocoa/bookmarks/bookmark_bar_controller.mm
[modify] https://crrev.com/90b73afb789c6a84ce25579c08bb4ac55164c768/chrome/browser/ui/cocoa/location_bar/autocomplete_text_field.mm
[modify] https://crrev.com/90b73afb789c6a84ce25579c08bb4ac55164c768/chrome/browser/ui/cocoa/toolbar/toolbar_controller.mm