Move FileEnumerator to its own file, do some refactoring.

chrome/browser/shell_integration_win.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/shell_integration.h"
 
 #include <windows.h>
 #include <shobjidl.h>
 #include <propkey.h>
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/file_util.h"
+#include "base/files/file_enumerator.h"
 #include "base/message_loop.h"
 #include "base/path_service.h"
 #include "base/string_util.h"
 #include "base/stringprintf.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/utf_string_conversions.h"
 #include "base/win/registry.h"
 #include "base/win/scoped_comptr.h"
 #include "base/win/scoped_propvariant.h"
 #include "base/win/shortcut.h"
@@ skipping 361 matching lines @@
       base::TimeDelta::FromSeconds(kMigrateChromiumShortcutsDelaySeconds));
 }
 
 int ShellIntegration::MigrateShortcutsInPathInternal(
     const base::FilePath& chrome_exe,
     const base::FilePath& path,
     bool check_dual_mode) {
   DCHECK(base::win::GetVersion() >= base::win::VERSION_WIN7);
 
   // Enumerate all pinned shortcuts in the given path directly.
-  file_util::FileEnumerator shortcuts_enum(
+  base::FileEnumerator shortcuts_enum(
       path, false,  // not recursive
-      file_util::FileEnumerator::FILES, FILE_PATH_LITERAL("*.lnk"));
+      base::FileEnumerator::FILES, FILE_PATH_LITERAL("*.lnk"));
 
   bool is_per_user_install =
       InstallUtil::IsPerUserInstall(chrome_exe.value().c_str());
 
   int shortcuts_migrated = 0;
   base::FilePath target_path;
   string16 arguments;
   base::win::ScopedPropVariant propvariant;
   for (base::FilePath shortcut = shortcuts_enum.Next(); !shortcut.empty();
        shortcut = shortcuts_enum.Next()) {
@@ skipping 117 matching lines @@
     }
 
     shortcut = shortcut.Append(shortcut_name).Append(shortcut_name +
                                                      installer::kLnkExt);
     if (file_util::PathExists(shortcut))
       return shortcut;
   }
 
   return base::FilePath();
 }