Support DataSaver for SharedWorker

content/public/common/web_preferences.h

Index: content/public/common/web_preferences.h
diff --git a/content/public/common/web_preferences.h b/content/public/common/web_preferences.h
index bcceb6b29e3b441f67e053ac7543cc51b4fa7676..00f619c26cdb7e634d632c0017a79317148ed93c 100644
--- a/content/public/common/web_preferences.h
+++ b/content/public/common/web_preferences.h
@@ -13,6 +13,7 @@
 #include "base/time/time.h"
 #include "build/build_config.h"
 #include "content/common/content_export.h"
+#include "third_party/WebKit/public/web/WebDataSaverFlag.h"
 #include "ui/base/touch/touch_device.h"
 #include "url/gurl.h"
 
@@ -120,7 +121,7 @@ struct CONTENT_EXPORT WebPreferences {
   bool dns_prefetching_enabled;
   // Preference to save data. When enabled, requests will contain the header
   // 'Save-Data: on'.
-  bool data_saver_enabled;
+  blink::WebDataSaverFlag data_saver_flag;
   bool local_storage_enabled;
   bool databases_enabled;
   bool application_cache_enabled;