Move FileEnumerator to its own file, do some refactoring.

chrome/browser/component_updater/pepper_flash_component_installer.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/component_updater/flash_component_installer.h"
 
 #include <string.h>
 
 #include <vector>
 
 #include "base/base_paths.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/file_util.h"
+#include "base/files/file_enumerator.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
 #include "base/path_service.h"
 #include "base/string_util.h"
 #include "base/stringprintf.h"
 #include "base/strings/string_split.h"
 #include "base/utf_string_conversions.h"
 #include "base/values.h"
 #include "base/version.h"
 #include "build/build_config.h"
@@ skipping 62 matching lines @@
 // so we need to enumerate the directories to find the full path.
 // On success, |latest_dir| returns something like:
 // <profile>\AppData\Local\Google\Chrome\User Data\PepperFlash\10.3.44.555\.
 // |latest_version| returns the corresponding version number. |older_dirs|
 // returns directories of all older versions.
 bool GetPepperFlashDirectory(base::FilePath* latest_dir,
                              Version* latest_version,
                              std::vector<base::FilePath>* older_dirs) {
   base::FilePath base_dir = GetPepperFlashBaseDirectory();
   bool found = false;
-  file_util::FileEnumerator
-      file_enumerator(base_dir, false, file_util::FileEnumerator::DIRECTORIES);
+  base::FileEnumerator
+      file_enumerator(base_dir, false, base::FileEnumerator::DIRECTORIES);
   for (base::FilePath path = file_enumerator.Next(); !path.value().empty();
        path = file_enumerator.Next()) {
     Version version(path.BaseName().MaybeAsASCII());
     if (!version.IsValid())
       continue;
     if (found) {
       if (version.CompareTo(*latest_version) > 0) {
         older_dirs->push_back(*latest_dir);
         *latest_dir = path;
         *latest_version = version;
@@ skipping 277 matching lines @@
 #if defined(GOOGLE_CHROME_BUILD) && !defined(OS_LINUX)
   // Component updated flash supersedes bundled flash therefore if that one
   // is disabled then this one should never install.
   CommandLine* cmd_line = CommandLine::ForCurrentProcess();
   if (cmd_line->HasSwitch(switches::kDisableBundledPpapiFlash))
     return;
   BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE,
                           base::Bind(&StartPepperFlashUpdateRegistration, cus));
 #endif
 }