Add recursive pattern matching for subfolders in file_enumerator.

base/files/file_enumerator.cc

Index: base/files/file_enumerator.cc
diff --git a/base/files/file_enumerator.cc b/base/files/file_enumerator.cc
index 974998036d3aeb3c766a16012eff9238001cf644..dfa277a2d1c7efe985fb931d8d5d5248e4822575 100644
--- a/base/files/file_enumerator.cc
+++ b/base/files/file_enumerator.cc
@@ -18,4 +18,9 @@ bool FileEnumerator::ShouldSkip(const FilePath& path) {
           !(INCLUDE_DOT_DOT & file_type_));
 }
 
+bool FileEnumerator::IsTypeMatched(bool is_dir) const {
+  return (file_type_ &
+          (is_dir ? FileEnumerator::DIRECTORIES : FileEnumerator::FILES)) != 0;
+}
+
 }  // namespace base