The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/b046099adcfa1192152a02d8106340a71bdb87b0

commit b046099adcfa1192152a02d8106340a71bdb87b0
Author: Tom Anderson <thomasanderson@chromium.org>
Date: Tue Aug 29 01:10:11 2017

Linux: Relayout tabstrip when frame button ordering changes

When the button ordering changes, a relayout got triggered only for
the OpaqueBrowserFrameView for the window, but not for the tabstrip.
This caused buttons to overlap with the tabstrip until you did
something to relayout the window (like a resize).  This CL always does
a relayout of the parent view (which includes the tabstrip).

R=pkasting@chromium.org
CC=​erg@chromium.org
BUG= 758422 

Change-Id: I18227d95092d68ede1bc4924f33e8ac9751f8b14
Reviewed-on: https://chromium-review.googlesource.com/630761
Reviewed-by: Peter Kasting <pkasting@chromium.org>
Commit-Queue: Thomas Anderson <thomasanderson@chromium.org>
Cr-Commit-Position: refs/heads/master@{#497969}
[modify] https://crrev.com/b046099adcfa1192152a02d8106340a71bdb87b0/chrome/browser/ui/views/frame/opaque_browser_frame_view_linux.cc

thomasanderson@,

Tried to change the order of buttons on Ubuntu 14.04 but we are unable to change in ubuntu settings.Could you please help us with clear steps to check this issue from TE end.

Thanks in advance..!!

The fix is unfortunately not available in Ubuntu 14.04.  It requires GTK3.14+, but 14.04 only has GTK3.10.