Move PathIsWritable, DirectoryExists, ContentsEqual, and TextContentsEqual to the base namespace.

chrome/browser/component_updater/component_patcher_operation.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/component_updater/component_patcher_operation.h"
 
 #include <string>
 #include <vector>
 
 #include "base/file_util.h"
@@ skipping 54 matching lines @@
     return ComponentUnpacker::kDeltaBadCommands;
 
   output_abs_path_ = unpack_dir.Append(
       base::FilePath::FromUTF8Unsafe(output_rel_path));
   ComponentUnpacker::Error parse_result = DoParseArguments(
       command_args, input_dir, installer);
   if (parse_result != ComponentUnpacker::kNone)
     return parse_result;
 
   const base::FilePath parent = output_abs_path_.DirName();
-  if (!file_util::DirectoryExists(parent)) {
+  if (!base::DirectoryExists(parent)) {
     if (!file_util::CreateDirectory(parent))
       return ComponentUnpacker::kIoError;
   }
 
   ComponentUnpacker::Error run_result = DoRun(patcher, error);
   if (run_result != ComponentUnpacker::kNone)
     return run_result;
 
   return CheckHash();
 }
@@ skipping 127 matching lines @@
     ComponentPatcher* patcher,
     int* error) {
   *error = 0;
   return patcher->Patch(ComponentPatcher::kPatchTypeCourgette,
                         input_abs_path_,
                         patch_abs_path_,
                         output_abs_path_,
                         error);
 }