There needs to be a way for users to see and remove EME/CDM data on a per domain basis, similar to the way users can see and remove cookies, local storage, database storage, etc. The latter are currently viewed (and optionally removed) using the "Cookies and site data" dialog (chrome://settings/cookies).
Issue 418195 allows users to clear all media licenses by selecting "Media licenses" in the "Clear Browsing Data" dialog to clear the EME/CDM data for all domains, if it exists. So this would add a "Media license" node to any domain that has a media license saved in the "Cookies and site data" dialog.
Selecting the media license should display origin, size on disk, and last modified time, the same as is done for other storage types. The data for the media license is encrypted, so there is no need to display the contents of the license.
Comment 1 by bugdroid1@chromium.org
, Oct 13 2016