src/: Update the remaining include paths of string_split.h to its new location.

net/ftp/ftp_directory_listing_parser_unittest.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/ftp/ftp_directory_listing_parser.h"
 
 #include "base/file_util.h"
 #include "base/format_macros.h"
 #include "base/path_service.h"
+#include "base/string_number_conversions.h"
 #include "base/stringprintf.h"
-#include "base/string_number_conversions.h"
-#include "base/string_split.h"
+#include "base/strings/string_split.h"
 #include "base/utf_string_conversions.h"
 #include "net/base/net_errors.h"
 #include "net/ftp/ftp_directory_listing_parser.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace net {
 
 namespace {
 
 class FtpDirectoryListingParserTest
@@ skipping 134 matching lines @@
   "dir-listing-windows-1",
   "dir-listing-windows-2",
 };
 
 INSTANTIATE_TEST_CASE_P(, FtpDirectoryListingParserTest,
                         testing::ValuesIn(kTestFiles));
 
 }  // namespace
 
 }  // namespace net