Add a feature for not compositing small scrollers

content/public/common/content_features.cc

Index: content/public/common/content_features.cc
diff --git a/content/public/common/content_features.cc b/content/public/common/content_features.cc
index 8f8da66f206ed17578b12cdd5ab93f43e3b7b283..10c71d7f42134dd5c7a6779902b5c812feefd4a2 100644
--- a/content/public/common/content_features.cc
+++ b/content/public/common/content_features.cc
@@ -234,6 +234,10 @@ const base::Feature kServiceWorkerNavigationPreload{
 const base::Feature kSharedArrayBuffer{"SharedArrayBuffer",
                                        base::FEATURE_ENABLED_BY_DEFAULT};
 
+// An experiment for skipping compositing small scrollers.
+const base::Feature kSkipCompositingSmallScrollers{
+    "SkipCompositingSmallScrollers", base::FEATURE_DISABLED_BY_DEFAULT};
+
 // Paint invalidation based on slimming paint. See https://goo.gl/eQczQW
 const base::Feature kSlimmingPaintInvalidation{
     "SlimmingPaintInvalidation", base::FEATURE_ENABLED_BY_DEFAULT};