Move FileEnumerator to its own file, do some refactoring.

chrome/browser/importer/ie_importer.cc

 // Copyright (c) 2012 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/importer/ie_importer.h"
 
 #include <ole2.h>
 #include <intshcut.h>
 #include <shlobj.h>
 #include <urlhist.h>
 #include <wininet.h>
 
 #include <algorithm>
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/file_util.h"
+#include "base/files/file_enumerator.h"
 #include "base/files/file_path.h"
 #include "base/string16.h"
 #include "base/string_util.h"
 #include "base/strings/string_split.h"
 #include "base/time.h"
 #include "base/utf_string_conversions.h"
 #include "base/win/registry.h"
 #include "base/win/scoped_co_mem.h"
 #include "base/win/scoped_comptr.h"
 #include "base/win/scoped_handle.h"
@@ skipping 773 matching lines @@
 void IEImporter::ParseFavoritesFolder(
     const FavoritesInfo& info,
     BookmarkVector* bookmarks,
     std::vector<ImportedFaviconUsage>* favicons) {
   base::FilePath file;
   std::vector<base::FilePath::StringType> file_list;
   base::FilePath favorites_path(info.path);
   // Favorites path length.  Make sure it doesn't include the trailing \.
   size_t favorites_path_len =
       favorites_path.StripTrailingSeparators().value().size();
-  file_util::FileEnumerator file_enumerator(
-      favorites_path, true, file_util::FileEnumerator::FILES);
+  base::FileEnumerator file_enumerator(
+      favorites_path, true, base::FileEnumerator::FILES);
   while (!(file = file_enumerator.Next()).value().empty() && !cancelled())
     file_list.push_back(file.value());
 
   // Keep the bookmarks in alphabetical order.
   std::sort(file_list.begin(), file_list.end());
 
   // Map from favicon URLs to the favicon data (the binary image data and the
   // set of bookmark URLs referring to the favicon).
   typedef std::map<GURL, ImportedFaviconUsage> FaviconMap;
   FaviconMap favicon_map;
@@ skipping 61 matching lines @@
   static int version = -1;
   if (version < 0) {
     wchar_t buffer[128];
     DWORD buffer_length = sizeof(buffer);
     base::win::RegKey reg_key(HKEY_LOCAL_MACHINE, kIEVersionKey, KEY_READ);
     LONG result = reg_key.ReadValue(L"Version", buffer, &buffer_length, NULL);
     version = ((result == ERROR_SUCCESS)? _wtoi(buffer) : 0);
   }
   return version;
 }