.   ASSERT_TRUE(       mock_dns_.ExpectLeafIndexRequestAndResponse(kLeafIndexQnames[0], 000000));    // Start query.   std::unique_ptr<LogDnsClient::AuditProofQuery> query;   net::TestCompletionCallback callback;   ASSERT_THAT(log_client->QueryAuditProof("ct.test", kLeafHashes[0], 000000,                                           &query, callback.callback()),               IsError(net::ERR_IO_PENDING));    // C