Show window size while resizing or moving

Show window size while resizing or moving

In other desktop environments, it was possible to display the window size
(and position) while resizing (or moving) the window. In Xubuntu (Ubuntu
12.04.2 LTS, running Xfce), this feature was terminated.
There are at least two use cases where this is quite useful:
Resizing the web browser to specific dimensions (1024x768).
Comparing two PDFs where the content is scaled to fit page width.
The first can be resolved using a plug-in for Chrome or Firefox. The
second could be resolved using the wmctrl app. The convenience of having
the location and dimensions always shown while moving or resizing is quite
handy. Rather than having multiple solutions, or having to run a command,
it'd be nice to have a solution integrated with the window manager.
Ensuring exact window sizes is more than obtuse pedantry.
How would you get this functionality back?