QUIC - added force_hol_blocking field trial param to enable forced HOL blocking.

net/quic/test_tools/quic_test_packet_maker.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.
 //
 // Provides a simple interface for QUIC tests to create a variety of packets.
 
 #ifndef NET_QUIC_TEST_TOOLS_QUIC_TEST_PACKET_MAKER_H_
 #define NET_QUIC_TEST_TOOLS_QUIC_TEST_PACKET_MAKER_H_
 
 #include <stddef.h>
@@ skipping 72 matching lines @@
       QuicPacketNumber ack_least_unacked,
       QuicPacketNumber stop_least_unacked,
       bool send_feedback);
   std::unique_ptr<QuicReceivedPacket> MakeDataPacket(
       QuicPacketNumber packet_number,
       QuicStreamId stream_id,
       bool should_include_version,
       bool fin,
       QuicStreamOffset offset,
       base::StringPiece data);
+  std::unique_ptr<QuicReceivedPacket> MakeForceHolDataPacket(
+      QuicPacketNumber packet_number,
+      QuicStreamId stream_id,
+      bool should_include_version,
+      bool fin,
+      QuicStreamOffset* offset,
+      base::StringPiece data);
   std::unique_ptr<QuicReceivedPacket> MakeMultipleDataFramesPacket(
       QuicPacketNumber packet_number,
       QuicStreamId stream_id,
       bool should_include_version,
       bool fin,
       QuicStreamOffset offset,
       const std::vector<std::string>& data_writes);
   std::unique_ptr<QuicReceivedPacket> MakeAckAndDataPacket(
       QuicPacketNumber packet_number,
       bool include_version,
@@ skipping 116 matching lines @@
   QuicPacketHeader header_;
   Perspective perspective_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicTestPacketMaker);
 };
 
 }  // namespace test
 }  // namespace net
 
 #endif  // NET_QUIC_TEST_TOOLS_QUIC_TEST_PACKET_MAKER_H_