file_util: Convert the wstring version of IsDirectoryEmpty to FilePath.

base/file_util.cc

-// Copyright (c) 2006-2009 The Chromium Authors. All rights reserved.
+// Copyright (c) 2010 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>
 
@@ skipping 175 matching lines @@
   size_t len;
   while ((len = fread(buf, 1, sizeof(buf), file)) > 0) {
     if (contents)
       contents->append(buf, len);
   }
   CloseFile(file);
 
   return true;
 }
 
+bool IsDirectoryEmpty(const FilePath& dir_path) {
+  FileEnumerator files(dir_path, false,
+      static_cast<FileEnumerator::FILE_TYPE>(
+          FileEnumerator::FILES | FileEnumerator::DIRECTORIES));
+  if (files.Next().value().empty())
+    return true;
+  return false;
+}
+
 FILE* CreateAndOpenTemporaryFile(FilePath* path) {
   FilePath directory;
   if (!GetTempDir(&directory))
     return false;
 
   return CreateAndOpenTemporaryFileInDir(directory, path);
 }
 
 bool GetFileSize(const FilePath& file_path, int64* file_size) {
   FileInfo info;
@@ skipping 216 matching lines @@
 // FileEnumerator
 //
 // Note: the main logic is in file_util_<platform>.cc
 
 bool FileEnumerator::ShouldSkip(const FilePath& path) {
   FilePath::StringType basename = path.BaseName().value();
   return IsDot(path) || (IsDotDot(path) && !(INCLUDE_DOT_DOT & file_type_));
 }
 
 }  // namespace