Add a new QuicFlagSaver class for saving/restoring the values of QUIC flags in tests.

net/tools/quic/quic_dispatcher_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/tools/quic/quic_dispatcher.h"
 
 #include <memory>
 #include <ostream>
 #include <string>
 
@@ skipping 23 matching lines @@
 #include "testing/gmock_mutant.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using base::IntToString;
 using base::StringPiece;
 using net::EpollServer;
 using net::test::ConstructEncryptedPacket;
 using net::test::CryptoTestUtils;
 using net::test::MockQuicConnection;
 using net::test::MockQuicConnectionHelper;
-using net::test::ValueRestore;
 using std::ostream;
 using std::string;
 using std::vector;
 using testing::CreateFunctor;
 using testing::DoAll;
 using testing::InSequence;
 using testing::Invoke;
 using testing::WithoutArgs;
 using testing::_;
 
@@ skipping 1222 matching lines @@
   // New arrived CHLO will be dropped because this connection is in time wait
   // list.
   ASSERT_TRUE(time_wait_list_manager_->IsConnectionIdInTimeWait(conn_id));
   EXPECT_CALL(*time_wait_list_manager_, ProcessPacket(_, _, conn_id, _, _));
   ProcessPacket(client_address, conn_id, true, false, SerializeFullCHLO());
 }
 
 }  // namespace
 }  // namespace test
 }  // namespace net