Implement updateViaCache flag and no-cache by default for main service worker scripts

content/common/service_worker/service_worker_types.h

Index: content/common/service_worker/service_worker_types.h
diff --git a/content/common/service_worker/service_worker_types.h b/content/common/service_worker/service_worker_types.h
index a2ace940c6361a298c66b92a0eb8387033ae633b..48a6722df666794f519b41444c6abdfe462196cb 100644
--- a/content/common/service_worker/service_worker_types.h
+++ b/content/common/service_worker/service_worker_types.h
@@ -219,10 +219,21 @@ struct CONTENT_EXPORT ServiceWorkerObjectInfo {
   int64_t version_id;
 };
 
+struct CONTENT_EXPORT ServiceWorkerRegistrationOptions {
+  enum class UseCache { DontUse, Use, Last = Use };
+
+  ServiceWorkerRegistrationOptions();
+  // Initialize |scope| with the specified value and the rest with defaults
+  explicit ServiceWorkerRegistrationOptions(const GURL& scope);
+  ServiceWorkerRegistrationOptions(const GURL& scope, UseCache use_cache);
+  GURL scope;
+  UseCache use_cache;
+};
+
 struct CONTENT_EXPORT ServiceWorkerRegistrationObjectInfo {
   ServiceWorkerRegistrationObjectInfo();
   int handle_id;
-  GURL scope;
+  ServiceWorkerRegistrationOptions options;
   int64_t registration_id;
 };