Move FileEnumerator to its own file, do some refactoring.

base/file_util.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 "base/file_util.h"
 
 #if defined(OS_WIN)
 #include <io.h>
 #endif
 #include <stdio.h>
 
 #include <fstream>
 
+#include "base/files/file_enumerator.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
 #include "base/string_util.h"
 #include "base/stringprintf.h"
 #include "base/strings/string_piece.h"
 #include "base/utf_string_conversions.h"
 
+using base::FileEnumerator;
 using base::FilePath;
 
 namespace {
 
 const FilePath::CharType kExtensionSeparator = FILE_PATH_LITERAL('.');
 
 // The maximum number of 'uniquified' files we will try to create.
 // This is used when the filename we're trying to download is already in use,
 // so we create a new unique filename by appending " (nnn)" before the
 // extension, where 1 <= nnn <= kMaxUniqueFiles.
@@ skipping 127 matching lines @@
       contents->append(buf, len);
   }
   CloseFile(file);
 
   return true;
 }
 
 bool IsDirectoryEmpty(const FilePath& dir_path) {
   FileEnumerator files(dir_path, false,
       FileEnumerator::FILES | FileEnumerator::DIRECTORIES);
-  if (files.Next().value().empty())
+  if (files.Next().empty())
     return true;
   return false;
 }
 
 FILE* CreateAndOpenTemporaryFile(FilePath* path) {
   FilePath directory;
   if (!GetTempDir(&directory))
     return NULL;
 
   return CreateAndOpenTemporaryFileInDir(directory, path);
@@ skipping 76 matching lines @@
       return count;
     }
   }
 
   return -1;
 }
 
 int64 ComputeDirectorySize(const FilePath& root_path) {
   int64 running_size = 0;
   FileEnumerator file_iter(root_path, true, FileEnumerator::FILES);
-  for (FilePath current = file_iter.Next(); !current.empty();
-       current = file_iter.Next()) {
-    FileEnumerator::FindInfo info;
-    file_iter.GetFindInfo(&info);
-#if defined(OS_WIN)
-    LARGE_INTEGER li = { info.nFileSizeLow, info.nFileSizeHigh };
-    running_size += li.QuadPart;
-#else
-    running_size += info.stat.st_size;
-#endif
-  }
+  while (!file_iter.Next().empty())
+    running_size += file_iter.GetInfo().GetSize();
   return running_size;
 }
 
-///////////////////////////////////////////////
-// FileEnumerator
-//
-// Note: the main logic is in file_util_<platform>.cc
-
-bool FileEnumerator::ShouldSkip(const FilePath& path) {
-  FilePath::StringType basename = path.BaseName().value();
-  return basename == FILE_PATH_LITERAL(".") ||
-         (basename == FILE_PATH_LITERAL("..") &&
-          !(INCLUDE_DOT_DOT & file_type_));
-}
-
 }  // namespace