am ac19e876: am 03b08986: Allow a pubkeyRef to be null
am ac19e876: am 03b08986: Allow a pubkeyRef to be null

* commit 'ac19e8762045ea08ff97a0e6207c8c2f2223a2e0':
  Allow a pubkeyRef to be null

google/conscrypt,google/conscrypt,google/conscrypt,google/conscrypt,google/conscrypt,google/conscrypt