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

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 <stdint.h>
 
@@ skipping 168 matching lines @@
 // been opened which have neither been opened or reset. The limit on the number
 // of available streams is 10 times the limit on the number of open streams.
 const int kMaxAvailableStreamsMultiplier = 10;
 
 // Track the number of promises that are not yet claimed by a
 // corresponding get.  This must be smaller than
 // kMaxAvailableStreamsMultiplier, because RST on a promised stream my
 // create available streams entries.
 const int kMaxPromisedStreamsMultiplier = kMaxAvailableStreamsMultiplier - 1;
 
+// TCP RFC calls for 1 second RTO however Linux differs from this default and
+// define the minimum RTO to 200ms, we will use the same until we have data to
+// support a higher or lower value.
+static const int64_t kMinRetransmissionTimeMs = 200;
+
 // We define an unsigned 16-bit floating point value, inspired by IEEE floats
 // (http://en.wikipedia.org/wiki/Half_precision_floating-point_format),
 // with 5-bit exponent (bias 1), 11-bit mantissa (effective 12 with hidden
 // bit) and denormals, but without signs, transfinites or fractions. Wire format
 // 16 bits (little-endian byte order) are split into exponent (high 5) and
 // mantissa (low 11) and decoded as:
 //   uint64_t value;
 //   if (exponent == 0) value = mantissa;
 //   else value = (mantissa | 1 << 11) << (exponent - 1)
 const int kUFloat16ExponentBits = 5;
@@ skipping 1293 matching lines @@
       : iov(iov), iov_count(iov_count), total_length(total_length) {}
 
   const struct iovec* iov;
   const int iov_count;
   const size_t total_length;
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_PROTOCOL_H_