During upgrade to the Chromium 61 we have switched from GTK2 to GTK3
and now we have a few warnings about stuff being deprecated in GTK3.
Check any Linux build to get a list of them.

/cc @zcbenz 
atom/browser/ui/views/menu_bar.cc
UpdateMenuBarColor();
}
void MenuBar::UpdateMenuBarColor() {
#if defined(OS_WIN)
  background_color_ = color_utils::GetSysSkColor(COLOR_MENUBAR);
#elif defined(USE_X11)
  GetMenuBarColor(&enabled_color_, &disabled_color_, &highlight_color_,
                  &hover_color_, &background_color_);
#endif
  SetBackground(views::CreateSolidBackground(background_color_));
}
}