Update from https://crrev.com/304418

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 42 matching lines @@
 const QuicByteCount kDefaultMaxPacketSize = 1350;
 // 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.
 const QuicByteCount kDefaultTCPMSS = 1460;
 
 // Maximum size of the initial congestion window in packets.
-const QuicPacketCount kDefaultInitialWindow = 10;
 const QuicPacketCount kMaxInitialWindow = 100;
+// 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;
 
 // Default size of initial flow control window, for both stream and session.
 const uint32 kDefaultFlowControlSendWindow = 16 * 1024;  // 16 KB
 
 // Maximum size of the congestion window, in packets, for TCP congestion control
 // algorithms.
 const size_t kMaxTcpCongestionWindow = 200;
 
 // Default size of the socket receive buffer in bytes.
 const QuicByteCount kDefaultSocketReceiveBuffer = 256 * 1024;
@@ skipping 1019 matching lines @@
   SequenceNumberList* all_transmissions;
   // In flight packets have not been abandoned or lost.
   bool in_flight;
   // True if the packet can never be acked, so it can be removed.
   bool is_unackable;
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_PROTOCOL_H_