Move directory creation functions to base namespace.

tools/gn/generate_test_gn_data.cc

 // Copyright (c) 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.
 
 #include <fstream>
 #include <iostream>
 
 #include "base/file_util.h"
 #include "base/files/file_path.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 64 matching lines @@
                 int spread,
                 int max_depth,
                 int targets_per_level,
                 int files_per_target) {
   base::FilePath dirname = RepoPathToPathName(repo_path);
   base::FilePath filename = dirname.AppendASCII("BUILD.gn");
   std::cout << "Writing " << FilePathToUTF8(filename) << "\n";
 
   // Don't keep the file open while recursing.
   {
-    file_util::CreateDirectory(dirname);
+    base::CreateDirectory(dirname);
 
     std::ofstream file;
     file.open(FilePathToUTF8(filename).c_str(),
               std::ios_base::out | std::ios_base::binary);
     files_written++;
 
     for (int i = 0; i < targets_per_level; i++) {
       targets_written++;
       file << "executable(\"" << RepoPathToTargetName(repo_path, i)
            << "\") {\n";
@@ skipping 24 matching lines @@
   }
 }
 
 int main() {
   WriteLevel(std::vector<int>(), 5, 4, 3, 50);  // 781 files, 2343 targets
   //WriteLevel(std::vector<int>(), 6, 4, 2, 50);
   std::cout << "Wrote " << files_written << " files and "
             << targets_written << " targets.\n";
   return 0;
 }