Clean-up inline members of nested classes (webkit/)

webkit/fileapi/file_system_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 "webkit/fileapi/file_system_file_util.h"
+
+namespace fileapi {
+
+FilePath FileSystemFileUtil::EmptyFileEnumerator::Next() {
+  return FilePath();
+}
+
+int64 FileSystemFileUtil::EmptyFileEnumerator::Size() {
+  return 0;
+}
+
+base::Time FileSystemFileUtil::EmptyFileEnumerator::LastModifiedTime() {
+  return base::Time();
+}
+
+bool FileSystemFileUtil::EmptyFileEnumerator::IsDirectory() {
+  return false;
+}
+
+}  // namespace fileapi