This doesn't actually do much more checking of the permissions, but it should wire it up everywhere we'll need it. It will also at least only return public interfaces via GetInterface in the proxy now unless other bits are supplied.
Review URL: https://codereview.chromium.org/10984094
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@159729 0039d316-1c4b-4281-b951-d872f2087c98