Normally chromium hides the normal window borders/buttons/titlebar from your window manager because it shows it's own custom decorations. Since chromium 36, it is showing both the custom and the standard window decorations from my Xfce environment. I looked at Settings -> Appearance -> "Use system title bar and borders" and saw it selected which I don't think is normal, but even after deselecting it and restarting chromium the double window decorations remain. This is more of an annoyance and a slight waste of screen space, not really a usability issue.
over to chromium team
What happens if you select the GTK+ theme (middle button just above the "use system title bar and windwos" checkbox)?
I can switch between Classic theme and GTK+ theme but all that changes is the color/style of the native chromium decorations. Hey cool, I always wondered why the titlebar was more blue than I remember on some computers :) But the standard window decorations from Xfce remain.
I can confirm this bug when running under gnome2-lite as well. Double set of minimise-maximise-close buttons.
Ah, on Xfce clicking the "use GTK+ theme" button works once, but if I restart Chromium afterwards it shows double bars again (for the classic theme at least).
I'm getting the same problem on chromium-37.0.2062.94. If I select and unselect use system title bar and borders it goes away, but restarting chrome has the double window decorations again.
This does not seem to be a problem any more and has not for a while. closing