Get signals working in the EXTRA_DATA section of MHTML

components/offline_pages/core/offline_page_feature.cc

Index: components/offline_pages/core/offline_page_feature.cc
diff --git a/components/offline_pages/core/offline_page_feature.cc b/components/offline_pages/core/offline_page_feature.cc
index bfcc1fd2d70f9b209bdc2d4d013c2d847699dac9..9dfab58bfca43a20f3882786b7f5335974549cba 100644
--- a/components/offline_pages/core/offline_page_feature.cc
+++ b/components/offline_pages/core/offline_page_feature.cc
@@ -36,6 +36,9 @@ const base::Feature kOfflinePagesSharingFeature{
 const base::Feature kOfflinePagesSvelteConcurrentLoadingFeature{
     "OfflinePagesSvelteConcurrentLoading", base::FEATURE_DISABLED_BY_DEFAULT};
 
+const base::Feature kOfflinePagesLoadSignalCollectingFeature{
+    "OfflinePagesLoadSignalCollecting", base::FEATURE_DISABLED_BY_DEFAULT};
+
 const base::Feature kBackgroundLoaderForDownloadsFeature{
     "BackgroundLoadingForDownloads", base::FEATURE_ENABLED_BY_DEFAULT};
 
@@ -82,6 +85,10 @@ bool IsPrefetchingOfflinePagesEnabled() {
   return base::FeatureList::IsEnabled(kPrefetchingOfflinePagesFeature);
 }
 
+bool IsOfflinePagesLoadSignalCollectingEnabled() {
+  return base::FeatureList::IsEnabled(kOfflinePagesLoadSignalCollectingFeature);
+}
+
 bool ShouldUseNewBackgroundLoader() {
   return base::FeatureList::IsEnabled(kNewBackgroundLoaderFeature);
 }