I would like to know the answer to this as well. I have a CSS including font files but fonts require a CORS header to work properly across domains in some browser (like Firefox and IE). This is an issue because a number of firewalls block various headers (including CORS) from coming though. I need a way to get the default URL path without the converting to the CDN domain. Any way to do this?
plugins_url() and get_template_directory_uri() both convert to the CDN domain. Is there another function that will do the same without passing back the CDN domain?