Move FileEnumerator to its own file, do some refactoring.

chrome/browser/profiles/profile_manager.cc

Index: chrome/browser/profiles/profile_manager.cc
diff --git a/chrome/browser/profiles/profile_manager.cc b/chrome/browser/profiles/profile_manager.cc
index c107156b5c6de1b3a40ac47c7218d0e5eff0c4b3..9833faba5a1e2f2ed075f8a5b5d1e3e34a1bdf7a 100644
--- a/chrome/browser/profiles/profile_manager.cc
+++ b/chrome/browser/profiles/profile_manager.cc
@@ -11,6 +11,7 @@
 #include "base/debug/trace_event.h"
 #include "base/deferred_sequenced_task_runner.h"
 #include "base/file_util.h"
+#include "base/files/file_enumerator.h"
 #include "base/files/file_path.h"
 #include "base/metrics/histogram.h"
 #include "base/prefs/pref_registry_simple.h"
@@ -96,14 +97,10 @@ std::vector<base::FilePath>& ProfilesToDelete() {
 int64 ComputeFilesSize(const base::FilePath& directory,
                        const base::FilePath::StringType& pattern) {
   int64 running_size = 0;
-  file_util::FileEnumerator iter(directory, false,
-                                 file_util::FileEnumerator::FILES,
-                                 pattern);
-  while (!iter.Next().empty()) {
-    file_util::FileEnumerator::FindInfo info;
-    iter.GetFindInfo(&info);
-    running_size += file_util::FileEnumerator::GetFilesize(info);
-  }
+  base::FileEnumerator iter(directory, false, base::FileEnumerator::FILES,
+                            pattern);
+  while (!iter.Next().empty())
+    running_size += iter.GetInfo().GetSize();
   return running_size;
 }