Change QuicFramer so it accepts a QuicDataWriter rather than allocating

net/quic/quic_framer.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_FRAMER_H_
 #define NET_QUIC_QUIC_FRAMER_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 288 matching lines @@
       const QuicEncryptedPacket& encrypted,
       QuicConnectionIdLength connection_id_length,
       bool includes_version,
       QuicSequenceNumberLength sequence_number_length);
 
   // Returns a QuicPacket* that is owned by the caller, is created from
   // |frames|.  Returns nullptr if the packet could not be created.
   // The packet must be of size |packet_size|.
   QuicPacket* BuildDataPacket(const QuicPacketHeader& header,
                               const QuicFrames& frames,
-                              size_t packet_size);
+                              char* buffer,
+                              size_t packet_length);
 
   // Returns a QuicPacket* that is owned by the caller, and is populated with
   // the fields in |header| and |fec|.  Returns nullptr if the packet could
   // not be created.
   QuicPacket* BuildFecPacket(const QuicPacketHeader& header,
                              const QuicFecData& fec);
 
   // Returns a new public reset packet, owned by the caller.
   static QuicEncryptedPacket* BuildPublicResetPacket(
       const QuicPublicResetPacket& packet);
@@ skipping 217 matching lines @@
   // The time delta computed for the last timestamp frame. This is relative to
   // the creation_time.
   QuicTime::Delta last_timestamp_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicFramer);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_FRAMER_H_