A service to make some AddonManager functionality available to C++ callers.
Javascript callers should still use AddonManager.jsm directly.
Synchronously map a URI to the corresponding Addon ID.
Mappable URIs are limited to in-application resources belonging to the
add-on, such as Javascript compartments, XUL windows, XBL bindings, etc.
but do not include URIs from meta data, such as the add-on homepage.
| aURI | The nsIURI to map |
| true if the URI has been mapped successfully to an Addon ID |