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

content/browser/service_worker/service_worker_database.h

 // Copyright 2014 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_BROWSER_SERVICE_WORKER_SERVICE_WORKER_DATABASE_H_
 #define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_DATABASE_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 48 matching lines @@
     STATUS_ERROR_FAILED,
     STATUS_ERROR_NOT_SUPPORTED,
     STATUS_ERROR_MAX,
   };
   static const char* StatusToString(Status status);
 
   struct CONTENT_EXPORT RegistrationData {
     // These values are immutable for the life of a registration.
     int64_t registration_id;
     GURL scope;
+    bool use_cache;
 
     // Versions are first stored once they successfully install and become
     // the waiting version. Then transition to the active version. The stored
     // version may be in the ACTIVATED state or in the INSTALLED state.
     GURL script;
     int64_t version_id;
     bool is_active;
     bool has_fetch_handler;
     base::Time last_update_check;
     std::vector<GURL> foreign_fetch_scopes;
@@ skipping 322 matching lines @@
   FRIEND_TEST_ALL_PREFIXES(ServiceWorkerDatabaseTest,
                            UserData_UninitializedDatabase);
   FRIEND_TEST_ALL_PREFIXES(ServiceWorkerDatabaseTest, DestroyDatabase);
 
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerDatabase);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_DATABASE_H_