[Offline Pages] Feature flag to allow concurrent background loading on svelte

components/offline_pages/offline_page_feature.cc

Index: components/offline_pages/offline_page_feature.cc
diff --git a/components/offline_pages/offline_page_feature.cc b/components/offline_pages/offline_page_feature.cc
index e64dea3fd763d9abfaf9aa5128c121c740eef419..f8aeaf030a25afa5deb491b217f791802d752234 100644
--- a/components/offline_pages/offline_page_feature.cc
+++ b/components/offline_pages/offline_page_feature.cc
@@ -25,6 +25,9 @@ const base::Feature kOfflinePagesCTFeature {
 const base::Feature kOfflinePagesSharingFeature{
     "OfflinePagesSharing", base::FEATURE_DISABLED_BY_DEFAULT};
 
+const base::Feature kOfflinePagesSvelteConcurrentLoadingFeature{
+    "OfflinePagesSvelteConcurrentLoading", base::FEATURE_DISABLED_BY_DEFAULT};
+
 const base::Feature kBackgroundLoaderForDownloadsFeature{
     "BackgroundLoadingForDownloads", base::FEATURE_ENABLED_BY_DEFAULT};
 
@@ -40,6 +43,11 @@ bool IsOffliningRecentPagesEnabled() {
   return  base::FeatureList::IsEnabled(kOffliningRecentPagesFeature);
 }
 
+bool IsOfflinePagesSvelteConcurrentLoadingEnabled() {
+  return base::FeatureList::IsEnabled(
+      kOfflinePagesSvelteConcurrentLoadingFeature);
+}
+
 bool IsOfflinePagesCTEnabled() {
   return base::FeatureList::IsEnabled(kOfflinePagesCTFeature);
 }