Various themes have vertical alignment problems of the background tabs against the frame.
Fixing this is in a couple pieces:
(1) Eliminate conditional positioning of the imagery, just so the code is more sane.
(2) Adjust the positioning to actually match refresh layout.
(3) If possible, for backwards compat, paint the frame as if it always has 16 DIP above the tabs, no matter how much space it actually has.
Comment 1 by pkasting@chromium.org
, Jul 23