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

content/browser/service_worker/service_worker_database.cc

Index: content/browser/service_worker/service_worker_database.cc
diff --git a/content/browser/service_worker/service_worker_database.cc b/content/browser/service_worker/service_worker_database.cc
index 9f1bc46069a7bd360b55c7390bd5a971127f5610..a1b48dfb33dbab5f52586dac83caf55c825c146b 100644
--- a/content/browser/service_worker/service_worker_database.cc
+++ b/content/browser/service_worker/service_worker_database.cc
@@ -277,11 +277,11 @@ const char* ServiceWorkerDatabase::StatusToString(
 
 ServiceWorkerDatabase::RegistrationData::RegistrationData()
     : registration_id(kInvalidServiceWorkerRegistrationId),
+      update_via_cache(blink::WebServiceWorkerUpdateViaCache::kImports),
       version_id(kInvalidServiceWorkerVersionId),
       is_active(false),
       has_fetch_handler(false),
-      resources_total_size_bytes(0) {
-}
+      resources_total_size_bytes(0) {}
 
 ServiceWorkerDatabase::RegistrationData::RegistrationData(
     const RegistrationData& other) = default;
@@ -1403,6 +1403,10 @@ ServiceWorkerDatabase::Status ServiceWorkerDatabase::ParseRegistrationData(
   for (uint32_t feature : data.used_features())
     out->used_features.insert(feature);
 
+  if (data.has_update_via_cache())
+    out->update_via_cache = static_cast<blink::WebServiceWorkerUpdateViaCache>(
+        data.update_via_cache());
+
   return ServiceWorkerDatabase::STATUS_OK;
 }
 
@@ -1452,6 +1456,9 @@ void ServiceWorkerDatabase::WriteRegistrationDataInBatch(
   for (uint32_t feature : registration.used_features)
     data.add_used_features(feature);
 
+  data.set_update_via_cache(
+      static_cast<uint32_t>(registration.update_via_cache));
+
   std::string value;
   bool success = data.SerializeToString(&value);
   DCHECK(success);