relnote: Allow individual QUIC writers to limit the maximum packet size.

net/quic/quic_default_packet_writer.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_DEFAULT_PACKET_WRITER_H_
 #define NET_QUIC_QUIC_DEFAULT_PACKET_WRITER_H_
 
 #include "base/basictypes.h"
 #include "base/memory/weak_ptr.h"
 #include "net/base/ip_endpoint.h"
@@ skipping 14 matching lines @@
   ~QuicDefaultPacketWriter() override;
 
   // QuicPacketWriter
   WriteResult WritePacket(const char* buffer,
                           size_t buf_len,
                           const IPAddressNumber& self_address,
                           const IPEndPoint& peer_address) override;
   bool IsWriteBlockedDataBuffered() const override;
   bool IsWriteBlocked() const override;
   void SetWritable() override;
+  QuicByteCount GetMaxPacketSize(const IPEndPoint& peer_address) const override;
 
   void OnWriteComplete(int rv);
   void SetConnection(QuicConnection* connection) {
     connection_ = connection;
   }
 
  protected:
   void set_write_blocked(bool is_blocked) {
     write_blocked_ = is_blocked;
   }
 
  private:
   Socket* socket_;
   QuicConnection* connection_;
 
   // Whether a write is currently in flight.
   bool write_blocked_;
 
   base::WeakPtrFactory<QuicDefaultPacketWriter> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicDefaultPacketWriter);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_DEFAULT_PACKET_WRITER_H_