Add recursive pattern matching for subfolders in file_enumerator.

base/files/file_enumerator.cc

 // Copyright (c) 2013 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/files/file_enumerator.h"
 
 #include "base/files/file_util.h"
 
 namespace base {
 
 FileEnumerator::FileInfo::~FileInfo() {
 }
 
 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_));
 }
 
+bool FileEnumerator::IsTypeMatched(bool is_dir) const {
+  return (file_type_ &
+          (is_dir ? FileEnumerator::DIRECTORIES : FileEnumerator::FILES)) != 0;
+}
+
 }  // namespace base