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

chrome/browser/chromeos/login/wallpaper_manager.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 "chrome/browser/chromeos/login/wallpaper_manager.h"
 
 #include <vector>
 
 #include "ash/shell.h"
 #include "base/command_line.h"
@@ skipping 653 matching lines @@
   PrefService* prefs = g_browser_process->local_state();
   DictionaryPrefUpdate wallpaper_properties_pref(prefs,
       kUserWallpapersProperties);
   wallpaper_properties_pref->Clear();
   DictionaryPrefUpdate wallpapers_pref(prefs, kUserWallpapers);
   wallpapers_pref->Clear();
 }
 
 void WallpaperManager::DeleteAllExcept(const base::FilePath& path) {
   base::FilePath dir = path.DirName();
-  if (file_util::DirectoryExists(dir)) {
+  if (base::DirectoryExists(dir)) {
     base::FileEnumerator files(dir, false, base::FileEnumerator::FILES);
     for (base::FilePath current = files.Next(); !current.empty();
          current = files.Next()) {
       if (current != path)
         base::Delete(current, false);
     }
   }
 }
 
 void WallpaperManager::DeleteWallpaperInList(
@@ skipping 413 matching lines @@
 
 void WallpaperManager::SystemResumed(const base::TimeDelta& sleep_duration) {
   BatchUpdateWallpaper();
 }
 
 void WallpaperManager::TimezoneChanged(const icu::TimeZone& timezone) {
   RestartTimer();
 }
 
 }  // namespace chromeos