Chromium/Chrome policy templates doubt

I've been trying to find some more info about a directory variable that I see mentioned at this page -http://www.chromium.org/administrators/policy-list-3/user-data-directory-variables

The variable in question is ${program_files} - The "Program Files" folder for the current process. Depends on whether it is 32 or 64 bit process.
(example resolution : "C:\Program Files (x86)")

Unfortunately, I cannot find any more information about it, so how exactly does one use it? I can't see anything in this page -http://www.chromium.org/administrators/policy-list-3 that could possible point to any info, at all.

Has anyone used these policy templates, and made use of the variable ${program_files}? And, if so, how did you use it?

I wish there was more detailed information about it. Any search engine queries I've made always point to the same page, that I provided above, or some other website that doesn't say anything new.