This is the last of many cls adding explicit logging in all our domain
mutation flows to facilitate transaction reporting.
The transfer process is as follows:
GAINING sends a TransferRequest to LOSING
LOSING either acks (TransferApprove), nacks (TransferReject) or does nothing
(auto approve). For acks and autoapproves, we produce a +1 counter for GAINING
and LOSING for domain-gaining/losing-successful for each registrar, to be
reported on the approve date + the transfer grace period. For nacks, we produce
a +1 counter for domain-gaining/losing-nacked for each registrar.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=166535579
16e8286dca