Cache the value of GetMaxPlaintextSize in QuicPacketCreator. No functional change.

net/quic/quic_packet_generator_test.cc

 // 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.
 
 #include "net/quic/quic_packet_generator.h"
 
 #include <string>
 
 #include "net/quic/crypto/crypto_protocol.h"
 #include "net/quic/crypto/null_encrypter.h"
@@ skipping 607 matching lines @@
   size_t length =
       NullEncrypter().GetCiphertextSize(0) +
       GetPacketHeaderSize(
           creator_->connection_id_length(), true,
           QuicPacketCreatorPeer::NextSequenceNumberLength(creator_),
           NOT_IN_FEC_GROUP) +
       // Add an extra 3 bytes for the payload and 1 byte so BytesFree is larger
       // than the GetMinStreamFrameSize.
       QuicFramer::GetMinStreamFrameSize(1, 0, false, NOT_IN_FEC_GROUP) + 3 +
       QuicFramer::GetMinStreamFrameSize(1, 0, true, NOT_IN_FEC_GROUP) + 1;
-  creator_->set_max_packet_length(length);
+  creator_->SetMaxPacketLength(length);
   delegate_.SetCanWriteAnything();
   {
      InSequence dummy;
      EXPECT_CALL(delegate_, OnSerializedPacket(_)).WillOnce(
          SaveArg<0>(&packet_));
      EXPECT_CALL(delegate_, OnSerializedPacket(_)).WillOnce(
          SaveArg<0>(&packet2_));
   }
   generator_.StartBatchOperations();
   // Queue enough data to prevent a stream frame with a non-zero offset from
@@ skipping 461 matching lines @@
   generator_.SetConnectionIdLength(7);
   EXPECT_EQ(PACKET_8BYTE_CONNECTION_ID, creator_->connection_id_length());
   generator_.SetConnectionIdLength(8);
   EXPECT_EQ(PACKET_8BYTE_CONNECTION_ID, creator_->connection_id_length());
   generator_.SetConnectionIdLength(9);
   EXPECT_EQ(PACKET_8BYTE_CONNECTION_ID, creator_->connection_id_length());
 }
 
 }  // namespace test
 }  // namespace net