Move FileEnumerator to its own file, do some refactoring.

chrome/installer/setup/setup_util.cc

Index: chrome/installer/setup/setup_util.cc
diff --git a/chrome/installer/setup/setup_util.cc b/chrome/installer/setup/setup_util.cc
index 55a4a8b1bdf8353e614e181b7603d2dc03a8af74..768755a7f2cb98d1270d7a2225ab781d293eefec 100644
--- a/chrome/installer/setup/setup_util.cc
+++ b/chrome/installer/setup/setup_util.cc
@@ -10,6 +10,7 @@
 
 #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/process_util.h"
@@ -125,8 +126,8 @@ int ApplyDiffPatch(const base::FilePath& src,
 Version* GetMaxVersionFromArchiveDir(const base::FilePath& chrome_path) {
   VLOG(1) << "Looking for Chrome version folder under " << chrome_path.value();
   Version* version = NULL;
-  file_util::FileEnumerator version_enum(chrome_path, false,
-      file_util::FileEnumerator::DIRECTORIES);
+  base::FileEnumerator version_enum(chrome_path, false,
+      base::FileEnumerator::DIRECTORIES);
   // TODO(tommi): The version directory really should match the version of
   // setup.exe.  To begin with, we should at least DCHECK that that's true.
 
@@ -134,12 +135,11 @@ Version* GetMaxVersionFromArchiveDir(const base::FilePath& chrome_path) {
   bool version_found = false;
 
   while (!version_enum.Next().empty()) {
-    file_util::FileEnumerator::FindInfo find_data = {0};
-    version_enum.GetFindInfo(&find_data);
-    VLOG(1) << "directory found: " << find_data.cFileName;
+    base::FileEnumerator::FileInfo find_data = version_enum.GetInfo();
+    VLOG(1) << "directory found: " << find_data.GetName().value();
 
     scoped_ptr<Version> found_version(
-        new Version(WideToASCII(find_data.cFileName)));
+        new Version(WideToASCII(find_data.GetName().value())));
     if (found_version->IsValid() &&
         found_version->CompareTo(*max_version.get()) > 0) {
       max_version.reset(found_version.release());