QUIC - did the plumbing to persist and restore crypto config's
CachedState to disk cache.

This code doesn't save/restore things to disk yet.

R=wtc@chromium.org

Review URL: https://codereview.chromium.org/146303002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247114 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 247114