Pass data saver pref value into embedded worker

content/common/service_worker/embedded_worker_settings.h

+// 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.
+
+#ifndef CONTENT_COMMON_SERVICE_WORKER_EMBEDDED_WORKER_SETTINGS_H_
+#define CONTENT_COMMON_SERVICE_WORKER_EMBEDDED_WORKER_SETTINGS_H_
+
+#include "content/public/common/web_preferences.h"
+
+namespace content {
+
+struct EmbeddedWorkerSettings {
+  content::V8CacheOptions v8_cache_options;
+  bool data_saver_enabled;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_COMMON_SERVICE_WORKER_EMBEDDED_WORKER_SETTINGS_H_