JSPrincipals
use js_holdprincipals and js_dropprincipals.
...use the js_holdprincipals to increment refcount, and use js_dropprincipals to decrement refcount.
... see also mxr id search for jsprincipals js_newglobalobject js_holdprincipals js_dropprincipals bug 715417 - removed getprincipalarray and globalprivilegesenabled bug 728250 - added dump method, removed codebase, destroy, and subsume properties bug 884676 - changed refcount type to mozilla::atomic ...