Move FileEnumerator to its own file, do some refactoring.

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"
 #include "base/file_util.h"
+#include "base/files/file_enumerator.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/path_service.h"
 #include "base/prefs/pref_registry_simple.h"
 #include "base/prefs/pref_service.h"
 #include "base/string_util.h"
 #include "base/stringprintf.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/threading/worker_pool.h"
@@ skipping 656 matching lines @@
   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)) {
-    file_util::FileEnumerator files(dir, false,
-                                    file_util::FileEnumerator::FILES);
+    base::FileEnumerator files(dir, false, base::FileEnumerator::FILES);
     for (base::FilePath current = files.Next(); !current.empty();
          current = files.Next()) {
       if (current != path)
         file_util::Delete(current, false);
     }
   }
 }
 
 void WallpaperManager::DeleteWallpaperInList(
     const std::vector<base::FilePath>& file_list) {
@@ skipping 408 matching lines @@
 
 void WallpaperManager::SystemResumed(const base::TimeDelta& sleep_duration) {
   BatchUpdateWallpaper();
 }
 
 void WallpaperManager::TimezoneChanged(const icu::TimeZone& timezone) {
   RestartTimer();
 }
 
 }  // chromeos