Move least_packet_awaited_by_peer_ from QuicReceivedPacketManager to

net/quic/quic_sent_packet_manager.h

Index: net/quic/quic_sent_packet_manager.h
diff --git a/net/quic/quic_sent_packet_manager.h b/net/quic/quic_sent_packet_manager.h
index f18b2db14ae22858f30a2734bdd842a6d974e287..8b7bcbd58f236c7741de23f31282bfb56220d4bd 100644
--- a/net/quic/quic_sent_packet_manager.h
+++ b/net/quic/quic_sent_packet_manager.h
@@ -226,6 +226,10 @@ class NET_EXPORT_PRIVATE QuicSentPacketManager {
     return largest_observed_;
   }
 
+  QuicPacketSequenceNumber least_packet_awaited_by_peer() {
+    return least_packet_awaited_by_peer_;
+  }
+
   void set_network_change_visitor(NetworkChangeVisitor* visitor) {
     DCHECK(!network_change_visitor_);
     DCHECK(visitor);
@@ -261,6 +265,9 @@ class NET_EXPORT_PRIVATE QuicSentPacketManager {
   typedef linked_hash_map<QuicPacketSequenceNumber,
                           TransmissionType> PendingRetransmissionMap;
 
+  // Updates the least_packet_awaited_by_peer.
+  void UpdatePacketInformationReceivedByPeer(const QuicAckFrame& ack_frame);
+
   // Process the incoming ack looking for newly ack'd data packets.
   void HandleAckForSentPackets(const QuicAckFrame& ack_frame);
 
@@ -355,6 +362,9 @@ class NET_EXPORT_PRIVATE QuicSentPacketManager {
   // from the peer.
   QuicPacketSequenceNumber largest_observed_;
 
+  // Least sequence number which the peer is still waiting for.
+  QuicPacketSequenceNumber least_packet_awaited_by_peer_;
+
   // Tracks the first RTO packet.  If any packet before that packet gets acked,
   // it indicates the RTO was spurious and should be reversed(F-RTO).
   QuicPacketSequenceNumber first_rto_transmission_;