Move FileEnumerator to its own file, do some refactoring.

chrome/browser/chromeos/policy/app_pack_updater.cc

Index: chrome/browser/chromeos/policy/app_pack_updater.cc
diff --git a/chrome/browser/chromeos/policy/app_pack_updater.cc b/chrome/browser/chromeos/policy/app_pack_updater.cc
index 26478531c39a15805f1c457610b58422d832f791..f1559e173d20de9bb1915505674fa2b5224084ac 100644
--- a/chrome/browser/chromeos/policy/app_pack_updater.cc
+++ b/chrome/browser/chromeos/policy/app_pack_updater.cc
@@ -7,6 +7,7 @@
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/file_util.h"
+#include "base/files/file_enumerator.h"
 #include "base/location.h"
 #include "base/stl_util.h"
 #include "base/string_util.h"
@@ -29,7 +30,6 @@
 #include "content/public/browser/notification_source.h"
 
 using content::BrowserThread;
-using file_util::FileEnumerator;
 
 namespace policy {
 
@@ -250,18 +250,16 @@ void AppPackUpdater::BlockingCheckCacheInternal(
 
   // Enumerate all the files in the cache |dir|, including directories
   // and symlinks. Each unrecognized file will be erased.
-  int types = FileEnumerator::FILES | FileEnumerator::DIRECTORIES |
-      FileEnumerator::SHOW_SYM_LINKS;
-  FileEnumerator enumerator(dir, false /* recursive */, types);
+  int types = base::FileEnumerator::FILES | base::FileEnumerator::DIRECTORIES |
+      base::FileEnumerator::SHOW_SYM_LINKS;
+  base::FileEnumerator enumerator(dir, false /* recursive */, types);
 
   for (base::FilePath path = enumerator.Next();
        !path.empty(); path = enumerator.Next()) {
-    FileEnumerator::FindInfo info;
-    enumerator.GetFindInfo(&info);
+    base::FileEnumerator::FileInfo info = enumerator.GetInfo();
     std::string basename = path.BaseName().value();
 
-    if (FileEnumerator::IsDirectory(info) ||
-        file_util::IsLink(FileEnumerator::GetFilename(info))) {
+    if (info.IsDirectory() || file_util::IsLink(info.GetName())) {
       LOG(ERROR) << "Erasing bad file in AppPack directory: " << basename;
       file_util::Delete(path, true /* recursive */);
       continue;