tree 16cdbfc9f8a2c87b1453a63b882b28ec2c733c72
parent 5da1ea29be0d5f4e8fc03c3c509f0474b53affd2
author Hiroshi Yamauchi <yamauchi@google.com> 1442268650 -0700
committer Hiroshi Yamauchi <yamauchi@google.com> 1442338383 -0700

Expect null referent in DequeuePendingReference().

Following up on CL 170735.

It's possible that the referent may potentially be cleared which would
cause a check failure. Avoid that.

Bug: 12687968
Bug: 23896462
Change-Id: I8ccc5936b61ceacf250624681e65307f23ce0405