QUIC: Only send a new SCUP if enough packets have been sent since the

net/quic/quic_connection.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.
 //
 // The entity that handles framing writes for a Quic client or server.
 // Each QuicSession will have a connection associated with it.
 //
 // On the server side, the Dispatcher handles the raw reads, and hands off
 // packets via ProcessUdpPacket for framing and processing.
 //
@@ skipping 508 matching lines @@
     // an ACK frame is opportunistically bundled with the first
     // outgoing packet.
     ScopedPacketBundler(QuicConnection* connection, AckBundling send_ack);
     ~ScopedPacketBundler();
 
    private:
     QuicConnection* connection_;
     bool already_in_batch_mode_;
   };
 
+  QuicPacketSequenceNumber sequence_number_of_last_sent_packet() const {
+    return sequence_number_of_last_sent_packet_;
+  }
+
  protected:
   // Packets which have not been written to the wire.
   // Owns the QuicPacket* packet.
   struct QueuedPacket {
     QueuedPacket(SerializedPacket packet,
                  EncryptionLevel level);
     QueuedPacket(SerializedPacket packet,
                  EncryptionLevel level,
                  TransmissionType transmission_type,
                  QuicPacketSequenceNumber original_sequence_number);
@@ skipping 20 matching lines @@
   // Selects and updates the version of the protocol being used by selecting a
   // version from |available_versions| which is also supported. Returns true if
   // such a version exists, false otherwise.
   bool SelectMutualVersion(const QuicVersionVector& available_versions);
 
   QuicPacketWriter* writer() { return writer_; }
   const QuicPacketWriter* writer() const { return writer_; }
 
   bool peer_port_changed() const { return peer_port_changed_; }
 
-  QuicPacketSequenceNumber sequence_number_of_last_sent_packet() const {
-    return sequence_number_of_last_sent_packet_;
-  }
-
  private:
   friend class test::QuicConnectionPeer;
   friend class test::PacketSavingConnection;
 
   typedef std::list<QueuedPacket> QueuedPacketList;
   typedef std::map<QuicFecGroupNumber, QuicFecGroup*> FecGroupMap;
 
   // Writes the given packet to socket, encrypted with packet's
   // encryption_level. Returns true on successful write, and false if the writer
   // was blocked and the write needs to be tried again. Notifies the
@@ skipping 252 matching lines @@
   // If non-empty this contains the set of versions received in a
   // version negotiation packet.
   QuicVersionVector server_supported_versions_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicConnection);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_CONNECTION_H_