Add QuicSentPacketManagerInterface, and QuicSentPacketManager implements it. No functional change e…

net/quic/test_tools/quic_test_utils.cc

Index: net/quic/test_tools/quic_test_utils.cc
diff --git a/net/quic/test_tools/quic_test_utils.cc b/net/quic/test_tools/quic_test_utils.cc
index e292e2f5123fdf5e50b7e29de23ce9245c241724..cae2840c7394b51d89d025a5f5edff6c94e91b6f 100644
--- a/net/quic/test_tools/quic_test_utils.cc
+++ b/net/quic/test_tools/quic_test_utils.cc
@@ -337,9 +337,9 @@ void PacketSavingConnection::SendOrQueuePacket(SerializedPacket* packet) {
       QuicUtils::CopyBuffer(*packet), packet->encrypted_length, true));
   // Transfer ownership of the packet to the SentPacketManager and the
   // ack notifier to the AckNotifierManager.
-  sent_packet_manager_.OnPacketSent(packet, kInvalidPathId, 0, QuicTime::Zero(),
-                                    NOT_RETRANSMISSION,
-                                    HAS_RETRANSMITTABLE_DATA);
+  sent_packet_manager_->OnPacketSent(packet, kInvalidPathId, 0,
+                                     QuicTime::Zero(), NOT_RETRANSMISSION,
+                                     HAS_RETRANSMITTABLE_DATA);
 }
 
 MockQuicSession::MockQuicSession(QuicConnection* connection)