Move directory creation functions to base namespace.

tools/gn/ninja_target_writer.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 "tools/gn/ninja_target_writer.h"
 
 #include <fstream>
 #include <sstream>
 
 #include "base/file_util.h"
@@ skipping 33 matching lines @@
                     target->label().GetUserVisibleName(false));
   trace.SetToolchain(settings->toolchain_label());
 
   base::FilePath ninja_file(settings->build_settings()->GetFullPath(
       helper.GetNinjaFileForTarget(target).GetSourceFile(
           settings->build_settings())));
 
   if (g_scheduler->verbose_logging())
     g_scheduler->Log("Writing", FilePathToUTF8(ninja_file));
 
-  file_util::CreateDirectory(ninja_file.DirName());
+  base::CreateDirectory(ninja_file.DirName());
 
   // It's rediculously faster to write to a string and then write that to
   // disk in one operation than to use an fstream here.
   std::stringstream file;
 
   // Call out to the correct sub-type of writer.
   if (target->output_type() == Target::COPY_FILES) {
     NinjaCopyTargetWriter writer(target, toolchain, file);
     writer.Run();
   } else if (target->output_type() == Target::CUSTOM) {
@@ skipping 48 matching lines @@
   const Target::FileList& outputs = target_->script_values().outputs();
   std::vector<std::string> output_template_args;
   for (size_t i = 0; i < outputs.size(); i++) {
     // All outputs should be in the output dir.
     output_template_args.push_back(
         RemovePrefix(outputs[i].value(),
                      settings_->build_settings()->build_dir().value()));
   }
   return FileTemplate(output_template_args);
 }