Chrome Version: 59.0.3043.0 (Official Build) canary (64-bit)
aka the first canary that contains https://codereview.chromium.org/2719993004

I attached 2 screenshots:
-One with the window focused.
-One with the window unfocused (where the problem is).

Notice that the horizontal line in the tab strip is black when the window is unfocused.
I believe this is a bug, but I may be wrong.
 

Deleted: Screen Shot 2017-03-16 at 10.47.57 AM.png 120 KB

	Screen Shot 2017-03-16 at 10.47.57 AM.png 120 KB View Download

Deleted: Screen Shot 2017-03-16 at 10.48.00 AM.png 114 KB

	Screen Shot 2017-03-16 at 10.48.00 AM.png 114 KB View Download