Remove lastest_revived_packet from QuicAckFrame since FEC is gone. No functional change expected.

net/quic/quic_framer_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_framer.h"
 
 #include <stdint.h>
 #include <algorithm>
 #include <map>
 #include <string>
@@ skipping 2258 matching lines @@
 
   EXPECT_EQ(QUIC_NO_ERROR, framer_.error());
   ASSERT_TRUE(visitor_.header_.get());
   EXPECT_TRUE(CheckDecryption(encrypted, !kIncludeVersion, !kIncludePathId));
 
   EXPECT_EQ(0u, visitor_.stream_frames_.size());
   ASSERT_EQ(1u, visitor_.ack_frames_.size());
   QuicAckFrame* frame = visitor_.ack_frames_[0];
   EXPECT_EQ(0xBA, frame->entropy_hash);
   EXPECT_EQ(kLargestObserved, frame->largest_observed);
-  EXPECT_EQ(0u, frame->latest_revived_packet);
   ASSERT_EQ(500u, frame->missing_packets.NumPacketsSlow());
   EXPECT_EQ(kMissingPacket - 499, frame->missing_packets.Min());
   EXPECT_EQ(kMissingPacket, frame->missing_packets.Max());
 
   // Verify that the packet re-serializes identically.
   QuicFrames frames;
   frames.push_back(QuicFrame(frame));
   scoped_ptr<QuicPacket> data(BuildDataPacket(*visitor_.header_, frames));
   ASSERT_TRUE(data != nullptr);
 
@@ skipping 2336 matching lines @@
     'o',  ' ',  'w',  'o',
     'r',  'l',  'd',  '!',
   };
   // clang-format on
 
   QuicFramerFuzzFunc(packet, arraysize(packet));
 }
 
 }  // namespace test
 }  // namespace net