Move network fuzzers from //testing/libfuzzer/fuzzers to //net

testing/libfuzzer/fuzzers/ftp_directory_listing_fuzzer.cc

-// Copyright 2015 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 <stddef.h>
-#include <stdint.h>
-
-#include <string>
-#include <vector>
-
-#include "base/at_exit.h"
-#include "base/i18n/icu_util.h"
-#include "base/time/time.h"
-#include "net/ftp/ftp_directory_listing_parser.h"
-
-struct TestCase {
-  TestCase() {
-    CHECK(base::i18n::InitializeICU());
-  }
-
-  // used by ICU integration.
-  base::AtExitManager at_exit_manager;
-};
-
-TestCase* test_case = new TestCase();
-
-
-// Entry point for LibFuzzer.
-extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
-  std::string buffer(reinterpret_cast<const char*>(data), size);
-  std::vector<net::FtpDirectoryListingEntry> entries;
-  net::ParseFtpDirectoryListing(buffer, base::Time::Now(), &entries);
-  return 0;
-}