QUIC varz to track measured and predicted bandwidth and rtt histograms

net/quic/quic_sent_packet_manager.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_QUIC_QUIC_SENT_PACKET_MANAGER_H_
 #define NET_QUIC_QUIC_SENT_PACKET_MANAGER_H_
 
 #include <deque>
 #include <list>
 #include <map>
@@ skipping 147 matching lines @@
   // Returns the current delay for the retransmission timer, which may send
   // either a tail loss probe or do a full RTO.  Returns QuicTime::Zero() if
   // there are no retransmittable packets.
   const QuicTime GetRetransmissionTime() const;
 
   const RttStats* GetRttStats() const;
 
   // Returns the estimated bandwidth calculated by the congestion algorithm.
   QuicBandwidth BandwidthEstimate() const;
 
+  // Returns true if the current bandwidth estimate is reliable.
+  bool HasReliableBandwidthEstimate() const;
+
   // Returns the size of the current congestion window in bytes.  Note, this is
   // not the *available* window.  Some send algorithms may not use a congestion
   // window and will return 0.
   QuicByteCount GetCongestionWindow() const;
 
   // Enables pacing if it has not already been enabled, and if
   // FLAGS_enable_quic_pacing is set.
   void MaybeEnablePacing();
 
   bool using_pacing() const { return using_pacing_; }
@@ skipping 138 matching lines @@
   // Sets of packets acked and lost as a result of the last congestion event.
   SendAlgorithmInterface::CongestionMap packets_acked_;
   SendAlgorithmInterface::CongestionMap packets_lost_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicSentPacketManager);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_SENT_PACKET_MANAGER_H_