Move directory creation functions to base namespace.

chrome/browser/sync_file_system/drive_backend_v1/fake_drive_service_helper.cc

 // Copyright 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 "chrome/browser/sync_file_system/drive_backend_v1/fake_drive_service_helper.h"
 
 #include "base/bind.h"
 #include "base/file_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
@@ skipping 261 matching lines @@
         CreateResultReceiver(&error, &list));
     base::RunLoop().RunUntilIdle();
     if (error != google_apis::HTTP_SUCCESS)
       return error;
   }
 }
 
 void FakeDriveServiceHelper::Initialize() {
   ASSERT_TRUE(base_dir_.CreateUniqueTempDir());
   temp_dir_ = base_dir_.path().Append(FPL("tmp"));
-  ASSERT_TRUE(file_util::CreateDirectory(temp_dir_));
+  ASSERT_TRUE(base::CreateDirectory(temp_dir_));
 }
 
 base::FilePath FakeDriveServiceHelper::WriteToTempFile(
     const std::string& content) {
   base::FilePath temp_file;
   EXPECT_TRUE(base::CreateTemporaryFileInDir(temp_dir_, &temp_file));
   EXPECT_EQ(static_cast<int>(content.size()),
             file_util::WriteFile(temp_file, content.data(), content.size()));
   return temp_file;
 }
 
 }  // namespace drive_backend
 }  // namespace sync_file_system