Move WriteFile and WriteFileDescriptor from file_util to base namespace.

chrome/browser/extensions/api/image_writer_private/test_utils.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/extensions/api/image_writer_private/test_utils.h"
 
 #if defined(OS_CHROMEOS)
 #include "chromeos/dbus/dbus_thread_manager.h"
 #include "chromeos/dbus/fake_dbus_thread_manager.h"
 #include "chromeos/dbus/fake_image_burner_client.h"
@@ skipping 149 matching lines @@
 
   return memcmp(image_buffer.get(), device_buffer.get(), image_bytes_read) == 0;
 }
 
 bool ImageWriterUnitTestBase::FillFile(const base::FilePath& file,
                                        const int pattern,
                                        const int length) {
   scoped_ptr<char[]> buffer(new char[length]);
   memset(buffer.get(), pattern, length);
 
-  return file_util::WriteFile(file, buffer.get(), length) == length;
+  return base::WriteFile(file, buffer.get(), length) == length;
 }
 
 }  // namespace image_writer
 }  // namespace extensions