[ServiceWorker] Fetch event should return integrity value

content/common/resource_request.h

Index: content/common/resource_request.h
diff --git a/content/common/resource_request.h b/content/common/resource_request.h
index 21219fbd007cc16bb8a79277dc5666d2cd7fa313..ab67d5ed77115a4968faa83f2021fd809cb19cc8 100644
--- a/content/common/resource_request.h
+++ b/content/common/resource_request.h
@@ -115,6 +115,9 @@ struct CONTENT_EXPORT ResourceRequest {
   // The redirect mode used in Fetch API.
   FetchRedirectMode fetch_redirect_mode = FetchRedirectMode::FOLLOW_MODE;
 
+  // The integrity used in Fetch API.
+  std::string fetch_integrity;
+
   // The request context passed to the ServiceWorker.
   RequestContextType fetch_request_context_type =
       REQUEST_CONTEXT_TYPE_UNSPECIFIED;