[sync] Add constexpr to EnumSet

components/reading_list/core/reading_list_switches.cc

Index: components/reading_list/core/reading_list_switches.cc
diff --git a/components/reading_list/core/reading_list_switches.cc b/components/reading_list/core/reading_list_switches.cc
deleted file mode 100644
index d6aba34c584cd88aaa4551c640e662bd7fea6737..0000000000000000000000000000000000000000
--- a/components/reading_list/core/reading_list_switches.cc
+++ /dev/null
@@ -1,17 +0,0 @@
-// Copyright 2016 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 "components/reading_list/core/reading_list_switches.h"
-
-#include "build/build_config.h"
-#include "base/command_line.h"
-#include "components/reading_list/core/reading_list_enable_flags.h"
-
-namespace reading_list {
-namespace switches {
-bool IsReadingListEnabled() {
-  return BUILDFLAG(ENABLE_READING_LIST);
-}
-}  // namespace switches
-}  // namespace reading_list