Update to the new definitions of CKM_NSS_CHACHA20_POLY1305 and
struct CK_NSS_AEAD_PARAMS.

This updates code added in https://codereview.chromium.org/23619044.

R=agl@chromium.org
BUG=310768
TEST=none

Review URL: https://codereview.chromium.org/36073014

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@230713 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 230713