Adds an assert to confirm that QUIC's session flow control window is

net/quic/quic_protocol.h

 // Copyright (c) 2012 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_PROTOCOL_H_
 #define NET_QUIC_QUIC_PROTOCOL_H_
 
 #include <stddef.h>
 #include <limits>
 #include <list>
@@ skipping 39 matching lines @@
 
 // Default and initial maximum size in bytes of a QUIC packet.
 const QuicByteCount kDefaultMaxPacketSize = 1350;
 // Default initial maximum size in bytes of a QUIC packet for servers.
 const QuicByteCount kDefaultServerMaxPacketSize = 1000;
 // The maximum packet size of any QUIC packet, based on ethernet's max size,
 // minus the IP and UDP headers. IPv6 has a 40 byte header, UPD adds an
 // additional 8 bytes.  This is a total overhead of 48 bytes.  Ethernet's
 // max packet size is 1500 bytes,  1500 - 48 = 1452.
 const QuicByteCount kMaxPacketSize = 1452;
-// Default maximum packet size used in Linux TCP implementations.
+// Default maximum packet size used in the Linux TCP implementation.
+// Used in QUIC for congestion window computations in bytes.
 const QuicByteCount kDefaultTCPMSS = 1460;
 
 // We match SPDY's use of 32 when secure (since we'd compete with SPDY).
 const QuicPacketCount kInitialCongestionWindowSecure = 32;
 // Be conservative, and just use double a typical TCP ICWND for HTTP.
 const QuicPacketCount kInitialCongestionWindowInsecure = 20;
 
 // Minimum size of initial flow control window, for both stream and session.
 const uint32 kMinimumFlowControlSendWindow = 16 * 1024;  // 16 KB
 
@@ skipping 968 matching lines @@
   bool in_flight;
   // True if the packet can never be acked, so it can be removed.
   bool is_unackable;
   // True if the packet is an FEC packet.
   bool is_fec_packet;
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_PROTOCOL_H_